Homemade Micro Milling Spindle
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- čas přidán 11. 09. 2024
- This project is inspired by this post: www.metallmodel...
For a futur project I need a small milling spindle. Inspired by the article above I started to build my own one. I used an ER-11 collet extension, 7200 angular contact bearings, a piece of 40mm ground C45 round steel for the spindle housing and an Escap 32V motor for the drive. Unfortunately I could only find the servo version of this motor which has some extra encoder stuff mounted on the rear side. I removed all this but it seems that this was not the best thing for the motor. After the modification it ran not as smooth as before. So if someone has the normal Escap 35NT for me, don't hesitate to contact me :)
After the first tests the spindle seems to work quite fine. I just have to make the poly-V pulleys a little bit smaller as the belt rubs against the inside of the belt cover.
This spindle might also be used as a toolpost grinder. I guess it is not that big of a difference.
I hope you enjoy the build and the video. It is a little bit on the long side.
Let me know what you think about it.
If you have questions or suggestions feel free to comment below.
If you are interested in more DIY toolmaking and machining stuff with budget equipment, consider subscribing to the channel. I really do appreciate your support.
Thanks.
Patreon: www.patreon.com/wecandothatbetter
Ooof, ripped the encoder off!
That spindle encoder would have saved you some grief later - common to use one on small spindles because keeping the right RPM means keeping chip load correct, and those little spindle bog down pretty easily.
This leads to the chip load getting out of hand, and soon you're deflecting your little miller too much and breaking them all the time, despite using a really slow feed: Too slow and you're rubbing, and not enough heat is taken away because the chip is too small. There's a narrow optimal chip load which is as thick as you can do, given the situation, limited by tool deflection upwards, and keeping this requires the spindle speed to not change as the cutter engages and disengages... which changes load on the motor, and without speed feedback, WILL cause the speed to dip, or else be too high when the chip is thin.
Best you can do is get the speeds and feeds right for the cut, there are calculators for this specficially super useful for small spindles, because the small bits are so easy to break.
But yeah - should have left the encoder on, because using it for feedback to keep the spindle at the programmed RPM is absolutely something you'll later miss.
Which speeds and feeds are optimal seems to be something this machinist isn't aware of - just going a little faster can in some cases fix chatter and lead to a better surface finish: What you're doing is avoiding a mechanical resonance. It's counterintuitive that cutting faster and deeper would do this, but it does. And this matters even more for ER11's.
never read a more condescending comment. your tone sucks.
A very useful little gizmo, the comments show how this could be improved in detail, thanks for publishing the video which provides inspiration for those of us who would like something similar 😊
That little brass insert in the lock nut was genius.
Thanks! I think this is common practice. Without the brass insert you would emediately damage the thread when locking the nut. So a little bit more work but it is worth the effort :)
@@WeCanDoThatBetter yes, exactly. As I was watching the video, and saw you drilling and tapping the hole for the grub screw, I immediately thought "that's gonna damage the threads". But then saw you make the insert and even cut the threads into it, and I was amazed, because I've never seen something like this. If I ever find myself having to make anything similar, I'll be sure to use this trick.
@@Bloodray19 Thanks again my friend :)
@@Bloodray19 You can make it even simpler. Cut a small disc from copper sheet metal. The “thread profile” forms on its own. This works sufficiently for smaller threads.
Years back in taking my first lathe apart I discovered something similar & thought "Ah that's how they do that!".
One of the nicest diy spindle builds I've seen but some of the workholding on the lathe was terrifying.
illustrate me.... i think it was pretty well
He will learn or he will lose an eye... hopefully the former.
I saw a lot of places where deflection may have happened.
@@deepbloo580 Yeah, I noticed a lot of odd subtle movements.
I think that drill attachment needs a sturdier mount.
Those 4 jaw chuck set ups work ok at low speed, far more secure than a lot of wood turning fixtures!
Nice unit but you missed one thing that would make it better. You should drill the motor pulley so that you can access the motor tension adjustment bolt so you can adjust the belt tension easier. As it stands you have to remove the pulley to adjust the motors position which makes it a crap shoot when adjusting belt tension.
Ich finde das faszinierend wie du die Teile bearbeitest, auf diesen kleinen Maschinen .
👍🏽👍🏽👍🏽👍🏽
Höchsten Respekt
Vielen Dank! Freut mich sehr, wenn es gefällt!
Oh, I love this site and his milling spindle. I spent most the time collecting that specificity escap [bldc] motor on eBay and have collected 7, so far. You did just as good an awesome job as the originator of this spindle..
Hi and thanks a lot for your comment! You lucky guy have lots of these motors :) Just in case you have one over, I guess I could need one ;)
I am always impressed by what you do with your little machines 👌👍
Thank you very much! Happy to hear, you like my work. I really do appreciate that!
Exelente trabajo felicitaciones.. Me compre un mini torno hace muy poco y tus videos son muy motivadores para mi que me estoy iniciando en este mundo de la metalmecanica .Saludos! desde Argentina,
Somebody get this poor boy a spindle lock.
:D Hehe, I assume I have to make it myself.. :/ Just dong't have the right idea yet.
@@WeCanDoThatBetter guess what i have the same solution, keep it simple, if it works it works!! and i have done much more heavy milling on it
Spindles (Workshop Practice Series) Paperback - January 1, 1998
by Harprit S. Sandhu (Author)
Publisher : Special Interest Model Books; UK ed. edition (January 1, 1998)
Language : English
Paperback : 144 pages
ISBN-10 : 1854861492
ISBN-13 : 978-1854861498
Hi and thank you very much for the hint on some background informations! I really do appreciate that. Have to check if it is available in Germany.
Thanks for sharing the details
@@WeCanDoThatBetter It is available on Amazon. It's a good book and it's quite cheap.
you dont need a specific book to understand spindle designs.
it DOES help to at least refer to SKF or other manufacturer recommendations... they tell you all you need to know...
a quick , yuk, online search...plenty of information. a diagram is enough.
traditionally, for something like this... two opposing angular contacts in the nose, and a floating third, radial bearing at the end. with a crush tube, to clamp all three inner races to the spindle. have to cater for thermal expansion, most of all.
only a small modification to the design...
Great spindle build. We shared this video on our homemade tool forum last week 😎
Every Time you making a Video i am Impressed. Good Work
Thank you very much for your kind comment! I really do appreciate that! Happy to hear, you like my work :)
@@WeCanDoThatBetter How is the Emco CNC Projekt going?
@@VanFlausch I disassembled the lathe partially during the last weeks and added a lubrication system and new gibs for the bedslide and did some other little improvements. The machine is now assembled back again and ready for the first parts. There will be a video soon on bringing the machine back to life. But before I release a video on making a small collet chuck for the Emco and a sheetmetal bedway protection.
@@WeCanDoThatBetter Great News!
Nice work. I think the bearing fit may have needed to be a bit tighter to meet the recommendations for that type of application. But probably fit for purpose. I reckon direct driving the spindle would have been a good option unless for some reason you needed that arrangement.
Hi and thanks for your comment and feedback! I chose a sliding fit for the bearings as I use angular contact bearings. The can only handle load in one direction. When I have to assemble and disassemble the spindle in the build process several times the bearings may be destroyed when trying to push them out again because in this direction they are pretty weak. The front steel cap and the rear aluminium motor plate both press against the outer race of the bearings and secure the bearings tightly in place. I machined the bearing seats that the outer race of the bearing is just a few hundreths "too high" so that the caps press against when screwed on. I hope that makes sense :)
Direct drive would be cool too, yes. I thought about this but for my first spindle build I chose the design linked in the video description. perhaps my next spindel will be direct drive. I guess this is a little bit more complicated. You have to have probably two parts: one spindle part and one motor part which gets screwed together in the middle.
@@WeCanDoThatBetterRemember that a milling spindle has quite a lot of side force. Even worse, it is vibratory. Any clearance you have in the spindle shaft will cause it to slop around in the bearing, even if it is just 0.01 mm. This will cause fretting and wear. Ok to have a press fit. When pressing the shaft out, you should never be pressing on the balls of the bearings. Always only on the inner or outer race. So it doesnt matter the bearings are weaker in one direction. That said, you could not press them apart in that weak direction. Even if the bottom bearing only was a press fit and the top a running fit as the top has much less side force. For a direct drive, there are heaps of little flexible couplings available on aliexpress. Then just need to mount the motor in line. Keep up the great work. I really appreciate your videos.
Yeah agreed @ashesman1 it even sounds kind of loose.
This is awesome, i started design work on something very similar a few years ago. I still have the fbx files. Main difference was I planned on casting it in zamak, and using annular contact bearings. proposed power TP power bldc motor, using a timing belt setup.
holy shit you finally got a band saw
Then promptly ignores it, hops back to using a cut off tool and nearly breaks the belt from a jam, and resorts to a handsaw lol xD
Do you follow Artisan Makes? Maybe you confused channels.
@@ShinehighCH UR right ,I watch them too much
@@ShinehighCH My thoughts as well!
You missed a lot of videos or you confused me with another channel. I got the bandsaw quite some time ago and I'm really happy to have it.
It's not a Saccardo, but it works, it can be improved by using angular contact bearings and a labyrinth seal, but still a usefull tool for a mill or a lathe
Sweet drill attachment!!
Thanks!
Also, doesn't seem like those bearings have the right arrangement and preload either. What's the Total Indicated Runout? Go read SKF's documents on spindle arrangement and preload, it would be easy to get those things right - everything else about this work seems pretty good otherwise, and it's a shame to hear it perform so poorly - it just doesn't sound right, although that could also be the tragically ruined motor.
I agree, and I appreciate that no aircraft parts are manufactured in this filming studio. 😊
"doesnt seem like"...
no, i assure you, its ABSOLUTELY NOT how they should be arranged...
look at the linked design in the description... firstly, radials, and secondly, the designer has chosen NOT to refer to SKF or other manufacturers about proper bearing placement...
channel creator has simply substituted with angular contacts. off the shelf, unmatched. sealed is very unusual... and definitely not a good idea if high speeds are the order of the day...
no allowance for thermal expansion. which will be insane with sealed, grease packed bearings...
no crush tube...
the preload, if one uses properly matched bearings, will be automatic.
just need a third bearing (radial) and a crush tube...
What's a crush tube? Just guessing but is it a tube that's placed over the spindle, so you can push the inner bearing races against each other?
@@ferriswhitehouse1476yes and the length determines the preload
This thread is full of “Um actually” “engineers” who have never made anything.
Though, I would’ve never modified an escap motor, itself. They come precision as it is.
Yes, you're right. Afterwards I know better... ;) Fortunately it was relative cheap. I didn't know that this motor is that different from the normal version. I thought "underneath" it is just the normal motor.
Well I think you did it indeed better.
Very nice work sir
Thank you very much for your kind comment! I really do appreciate that!
@@WeCanDoThatBetter I don’t mind giving compliments, especially where deserving
I suggest using less rpm's for the drilling with the proxxon as for steel this is way to fast you magnetized the metal.
Hi and thanks for your feedback! You might be right. I think the proxxon is too weak at low rpms. Have to try this next. But in the future I have a milling spindle for such tasks ;) Just have to find a way to mount it on my lathe. Or I make an even smaller one in the future.
It seems to me the motor would have been better mounted above the drive housing so you could have more clearance around the spindle nose ?... 🤔
Looking at how its mounted in the machine, it probably doesnt matter though...
Nice build !..
😎👍☘️🍻
I like to direct drive these things with outrunner motors. Pop the bearings out of the stator and mount it around the shaft. Widen out the hole in the rotor to fit the shaft. Put a thin concentric tube around the shaft between the rotor and spindle bearing to transfer the axial load. Make an adapter that screws to the rotor and has a set screw to grip the shaft. It can also have threads in the bore like the locking nut you made.
Zen atmosphere at the beginning...
Zen atmosphere gone at 1:06
😂
There seem to be a lot of experts in the comments.
Anyway, I find this VERY impressive!!! Thank you for sharing!! ❤🎉❤🎉
Thank you very much for your kind comment! I really do appreciate that! Yes that project raised some critic.
@@WeCanDoThatBetter I don't recall another video about a DIY small milling spindle, so...
Also, I didn't know that Mini Lathes with a lead screw are available, which one do you have?
Amazing work, I really admire your patience and resilience. I would like to know why you do some operations, such as internal cylindrical turning, by turning the chuck in reverse.
Congratulations and thanks for sharing.
Working with what you have, awesome work 👏 👍
Thank you very much for your kind comment! I really do appreciate that!
Nice video and presentation.
Page 11:00 yes I saw this before and no more. This parting tool abuses much lathe swing range (can’t part large diameter), also bite hard and self district. The flexible jaws can’t prevent rolling twisting and often sag under load. Once sag below centerline, the turning force pulls the blade off into the work and overloading the motor. I’ve switched to 250-007 with a T style blade (relieves on each side). If blade overhang is too far out off tool post, plus carriage plays, blade also sag below center line.
Nice work.🎉
Then try not to loose beating seats, distant bushing between bearings, and of course - try to make belt tension adjustments more easier, than bolts under the pulley 😅😉
Very neat and precise work! It is not clear why such an engine was chosen? To then radically redesign it? Probably it was easier to choose a more suitable one.
Hi and thanks for your comment! I wanted to use the same motor as in the article. Unfortunately on the used market there was only the servo version of this motor available. I thought that should be no problem not knowing that this motor is build differently. I noticed this afterwards when it was too late.
Amazing skills Sir. You just earned a new subscriber. As entertaining as instructive.
Im sure you have but id consider mounting that dang lathe a little more solidly in a heavier table/bench
Oh yes, I have to do definitely something to this problem! ;)
Great work dude 👍👍
Thank you!
From the sound of the spindle when running it seems there is play in the spindle somewhere. You didn't seem to put any preload into the bearings so that maybe where the vibration is coming from. Other than that this is a pretty nice build considering it is using small hobby grade machines.
Great build!
Thank you!
Bravo maistre apreciez modul de lucru
Why is the belt shredding at 28:59 ?
What seems like the belt is shredding are actually just the hairs from the white carpet on which I ran the motor earlier in the video. The belt collected the hairs somehow. At first I thought too that it's the belt itself but fortunately it's not :)
You need to add a little change belt guides. Maybe a little chamfer? Capsule the motor, Won't that prevent the engine from cooling properly?
probably because he can't make parts worth a shit lmao
Nice job mate 👍
Thanks my friend!
Good build. now much preload did you put on that shaft? lookled like 'finger tight' which isn't really enough. Also that escap motor is a bit slow for the size of cutters you are useing, consider a brushless in-runner at >10krpm
Hi and thanks for your comment! Good question. I put just a very light preload on the bearings. To be honest I'm not sure how much preload the bearings need to have and how to properly adjust it. I guess it is very hard to measure. If you have experience with it, I would be happy if you share it with me.
I thought about a brushless motor too but given the fact that it needs a special controller it seemed like a more complicated solution so I decided to got with a normal dc motor.
@@WeCanDoThatBetter if you get super high end bearings there is probably some formula from the manufacturer to calculate preload. with this sort of level and size though you are probably best with just a couple of aproperately sized wave-washers squished up with that nice locking nut you made to keep it under tension. if it's free-running for ages when you spin it by hand it's too loose. for the motor yes, the brishless driver is annoying, but you can use hobby ESCs with a servo tester knob for a cheap solution. alternitivly to keep it super simple if you want to use a dc motor you could use a ratio on that belt drive to step up the spindle speed a bit.
Amazing work mate!!
Thank you very much my friend!
@@WeCanDoThatBetter 3:30 AD QKAIhieod
Really nice videography. Do you mind sharing what you are using for a camera and lighting setup?
Hi and thanks for your kind feedback! The camera I use is a Canon 80d. Since I have led panels on the ceiling I most of the time use no additional video light.
Nicely done! Should make your mill all the more useful, being able to spin small end mills and drill bits much faster. What's the max RPM of the spindle? Did you check the runout?
At 28:34, is the spindle moving axially in and out of the housing, or is that just the camera?
Where did you get the collet chuck? Chinese ones always have terrible runout. I got a decent one from Shars, but it's 1/2" shank so I can't use angular contact bearings (none available that I've found). Two R8 bearings at each end of the shaft works well enough, but they wear out relatively quickly (couple years or so). I may try regrinding the taper on a Chinese ER11.
Hi, I just ordered them from Aliexpress. Actually I havent checked for runout yet. Have to do that. But with the endmill installed I saw a visible wobble which is not a good sign. But don't know if this was the collet or the taper itself. Have to check that. I assume all these chucks are the same. Don't know if there are higher and lower quality ones.
@@WeCanDoThatBetter Likely both the collet and chuck are bad (which can actually cancel eachother out sometimes). I bought high quality 1/8" and 1/4" collets, which cover a good range of tooling without breaking the bank. 1/8" shank PCB drills come in a wide range of sizes including larger than the shank (I have a set that goes up to 1/4"). But carbide drills chip really easily, especially if there's runout, so don't buy any until you get that taper ground to at least .002" TIR and preferably under .001".
@@WeCanDoThatBetter There are definitely good and bad, but no real way to be sure what you're getting until you receive it and can measure. Worth checking before putting work in to modify them. 1st one I bought was excellent, 2nd was awful, 3rd was OK (different sellers on A.E.).
Building tools. Very nice.
Thank you!
ya know they make spindles like these that can handle higher rpms at pretty impressive power for like under 200 bucks now
Off course I just could have bought one but that would be too boring. No need for a video and nothing to show how to make it for you ;)
excellent video.Can you tell me please what kind of tool post do you use and what size of turning tools?Thank you.
Thank you very much! The tool post is a multifix type from German manufacturer AXA. I made a video on the installation and showed it in detail. The tool post size I have is called Aa. I use 10mm tools with it.
@@WeCanDoThatBetter Thank you for your answer.Very kind of you.
Okay, love the tool, great work. Just one teeeeeeeeensy thing that bugs me in the vid i need to ask about.
How come you're abusing the Lathe to cut bores in the rectangular sheets of derlin/plate, rather than using a much nicer and safer boring head on your milling machine? I cringe so hard when seeing you doing it (okay, maybe i've nearly hit myself in the face doign it the lathe way that gives me a spec of fear/bias lol)
His mill is tiny. I suspect he doesn't have a boring head, or even the capability to hold some of the larger endmills.
abusing the lathe? lol... you think the bearings are gonna disintegrate or something from a piece of light material spinning slightly off balance? have you seen how eccentric steel shafts are turned? its ok to take care of your tools, but your way of thinking is like buying a car and keeping it inside your garage so the tires dont get worn out... tools are meant to be used and (slightly) abused, they are not museum pieces
@@TheMadJoker87 😂😂 You have no idea how I'm thinking. It's doable with a small lathe sure, as I've done myself, but its not the most secure work holding and when you've got a milling machine... That's the point I'm raising, not whatever insanity you're ranting at lol
@@qwertyface I've an even smaller one, n use a mt2 boring head on it comfortably. idk if you've seen his other videos, but he's made a custom boring head to high standard not that long ago too :)
@noviceartisan nothing wrong with using the lathe this way, it's only ali and acetal. I've done die bolsters out of flame cut steel for press tooling much larger than this on much larger machines, bur sometimes you don't have the capacity to balance it accordingly. I hardly call it "abuse"
Well done.
Thanks!
Will the rest of the milling machine be built from that attached article? That would be pretty neat.
Pretty much no ;)
I like it!
Thanks for sharing 🇨🇦
very good job.Thanks for sharing your ideea.
Thanks for your comment! I really do appreciate that!
Ich bewundere deine Arbeiten mit den kleinen Maschinen schon seit längerer Zeit. Auch diese kleine Frässpindel mit Eurohals. Immer wieder sieht man auch die Gleichstrommotoren, wobei ich mich frage, ob die in der Leistung wirklich genügend durchziehen? Ich würde gerne eine Supportschleifmaschine bauen, wobei die DC-Motoren natürlich vom Gewicht und der Größe ideal wären. Wie ist deine Erfahrung mit der Durchzugskraft des Motors? Danke und viel Spaß weiterhin.
Good job
Thanks!
Beautiful work as always.
Thank you very much!
Какое счастье, что живут идиоты с руками и смекалкой и дарят нам радость от просмотра 😂
thanks for the video, was the test on steel or alluminium?
Thanks! The test was in aluminium. Have to test the spindle in steel in the future.
as a change of pace, could you show the final assembly first, then show the milling, turning... then show the final assembly again... sort of a lincoln approach... tell them what you want to tell them, tell them it, then tell them what you told them?
Hi and thanks for your feedback! I will consider that. See this a lot on youtube. Maybe I should do it too :)
Well done for trying. It’s good to push your self to make new things. I think you were using the wrong cutting tips at the start of the video. Those are designed for soft metals.
Hi and thanks for your feedback. I really do appreciate that. I sometimes use the polished inserts for aluminium on steel too. As they are really sharp they have a really low cutting pressure. The part in the beginning had a really high stickout from the chuck making it very unstable to machine on my small machine. Therefore I used the polished inserts for minimum cutting forces to reduce vibration and chattering. They don't last very long in steel but sometimes I have no other choice.
@@WeCanDoThatBetter use the tail stock and a live centre to stabilise it and then you can use the correct tip.
@@crawlstockrc That's normally how I do it. But when machining internal bores it can't be done as such. I thing, you are referring to machining the bearing seats.
@@WeCanDoThatBetterright at the start when turning the OD and you commented the finish was rough.
Look nice, but what is profit in compare to small VFD spindle ? Like 300W BLDC or 800W 24.000 ?
zero hahaha.. even for small brushless spindle
wooow amazing kawan,,,kerja bagus 👍
Your spindle moves in and out of the housing when you rotate it? @27:27
Nice work as always
Thanks my friend!
What is the system you have that seems to retract the crosslide when you were threading? Looks like it could be really useful
It's just quick hands
What is special about escap motors? Why they are so expensive?
They are swiss made highest quality standard motors. I think that explains the high price. But yes, new they are insanely expensive.
@@WeCanDoThatBetter thank you, and what makes them worth the money for spindle motor?
Man, I feel bad for that servo motor. That was like modifying a nail gun to be used as a hammer.
Yeah, I could have done that better. Didn't know how the motor was put together so I just tried to seperate the bare motor but that was not my best idea ;)
Nicely put😅
@@WeCanDoThatBetter I was not commenting on the way you went about it. My critique was that you downgraded the motor, for an application that would really benefit from the closed loop control.
why did you remove the optical encoder? you could have had proper speed control with that! as in constant speed and it not changing based on the load D:
The encoder also needs a more complicated electronic to work. That's nothing I have on hand. Would be cool but I am not that experienced in electronics and I think this would be overkill.
@@WeCanDoThatBetter
arduino + pid controller (arduino project)+ opto encoder library, thats all you need. you give the two inputs to the arduino, you get one pwm output for the mosfet for the speed control. Then just calibrate the pid values to get a stable speed (not oscillating much) .
its really simple to make, you should totally learn how to do it, its not overkill and its not too complicated to do, and its totally worth it :P
good job
Thanks!
Awesome!
Thanks!
I think you ruined one or two bearings when modifying the motor. The sound is not good unfortunately. Nice work although the setup in the lathe when turning the rectangular parts made me scared... Why not use a boring head in the mill? Much safer to do so. Best! Job
Hi and thanks for your comment! You are right, removing the back part of the motor with the bearing was a bad idea. The sound now is really not very promising. But I will keep the motor as long as it runs and will use the spindle as it is at first. Perhaps I change the motor later. My milling machine takes only tools to 6mm shank diameter. It is not possible to use a boring head on this machine. So I have to be creative using the lathe as much as I can. In plastic I'm not that worried but you're right never forget how potentially dangerous this type of work can be. Using my selfmade boring head in the lathe chuck and the part stationary on the cross slide would be an option too for next time.
@@WeCanDoThatBetter The boring head in the spindle of your lathe combined with an additional z-axis would be a safe upgrade to do this kind of work. Thank you! Best! Job
and why we are using ball bearings for SPINDLE... forces while cutting will destroy them in no time
also why we are using aluminium while rest of spindle is steel?
He said they were angular contact bearings, what else would you use in a spindle? Sure lathes usually have tapered roller bearings but they run at relatively low speeds, high speed spindles are usually angular contact ball bearings.
They're not deep groove single race ball bearings; they're angular contact bearings.
They're able to take both radial and axial forces perfectly well enough, especially given that WCDTB is not going to be hogging out chunks of Ti with that spindle.
Probably better to not have commented than to have exposed your ignorance.
However, he didn't mention anything about preload. I don't know, but the omission from the video makes me worry that setting the preload correctly was omitted, period.
Wow
O
A
H
Impressive
Thanks ;)
Nice work. Wouldn't an 895 24v engine be enough?
Hi and thanks! I don't know which motor you have in mind but probably yes. The Escap motor is a high end quality motor which normally runs super smooth and quiet. If you can choose it is probably the better choice than the cheap standard ones. But I assume both would work.
Fancy and Nicely Done...!!! Thank You for sharing .. Cheers :)
Thank you very much for your comment! I really do appreciate that!
Wow. That's a VERY neat design.
It's slightly similar to a grinding attachment I made a few years back for my little lathe, but that's....... NOT such a neat design. In fact, using the thing terrifies me. This is due to my idea of building it around a little sewing machine motor I had (that has air vents on it that suck fine metal dust in, and deposits that all around the brushes that are carrying 240vac !), a toothed belt that always sounds like it's about to shred (And I never thought to design in any way for me to fit a belt cover), and a output spindle speed that tops out at around 30 to 35,000 rpm so I can run little Dremel die grinder accessories.
It works reasonably well, but usually I'd rather not bother with a ground finish on anything if it means risking electrocution, losing fingers to an unguarded and, maybe one day shredded belt, and/or taking shrapnel from an exploding baby grinding wheel. :D
the bearings are arranged all wrong...
did a TP grinder a while back, i chose to buy a 1/4 HP 2 pole motor, or 3000rpm... and round belt pulleys instead... im happy with the... 10K or so, most of my grinding wheels are for more like 5K, and with no guard on the thing yet... i havent used the "fast" set of pulleys yet?
a little dremel type stone is nothing... just stay out of its line? a 4-5" wheel is another story altogether...
the brushed universal motors are ok, but i really cant handle the sound they make.
i wouldnt use toothed belts for grinding... the round belts are intended for the high speeds and if you sink in too deep... they slip. happily.
@@paradiselost9946 Very few aspects of my grinder attachment are ideal. It was mainly made out of stuff I already had kicking about. The toothed belt and pullies were ones I'd bought in error when making a dumb electric feed for my little old lathe (Dumb as in, no stepper motor or anything fancy, just a variable speed controller, some brackets, a PSU, and a slightly undersized drive motor. It works fine for what it is). The sewing machine motor actually did come out of a broken sewing machine that a friend was throwing out, and the (IIRC) ER16 spindle was the only part I specifically bought to put this together, and even that was just a cheap one from China. It's all held together with a piece of really thick walled 100x100 angle iron that I welded gussets into.
If I had any serious use for a TP grinder I'd probably have put a bit more thought into building this (Or I might have even planned the build beforehand rather than just winging it. :D), but it was just something I made when I needed to grind in my chuck jaws, and it's probably only been used 10 or 15 times since then....... Not only because I know it could cause me serious damage if it suffered a "Sudden spontaneous self disassembly", but also because it actually looks and sounds like it is plotting to k!ll me every time I've had it fitted to my lathe ! :D
If I ever do build another, I think it would need to be a significantly more substantial design, and be a multi functional unit, so it could grind and (with a change of gear ratio) horizontal drill when on the tool post, but also be usable as a basic light duty mill with it mounted to a height adjustable post on the back of the lathe bed, then I could use the lathes T slotted cross slide as small milling machine table. I may be lucky enough to have a home workshop shed, but it's a tiny one, so any double duties a machine can pull that doesn't eat into my very limited space is a serious bonus.
@@Reman1975 lol, dont worry... often a tool has to be remade several times before you iron out the bugs... workflow... stupid mistakes on last passes...
i had three attempts at this TP grinder, four if you include the bronze bushes and MT3 taper for a bit of deep groove sawing years ago... five if you include the housing bored oversize...
then there was the chamfer episode... the last step...
'its left hand thread, its left hand thread, its left hand thread... run it backwards".
ZIP. guess who didnt run it backwards? lol. nothing ruined, but there is a nice nick in the locking ring, work got wacked out of line... and that was that, i wasnt about to reclock the whole piece for a mere chamfer!
and i sort of want to go back and do the housing again...
except i also found a 20K rated spindle from a coborn (top of the line?) at the scrapyard... that needs mounting one day. lol, the lump of casting its attached to almost weighs as much as my lathe itself!
thing is... i havent figured out how to disassemble it yet... theres no obvious locking rings or fasteners...
Demonstration of the finished item at 28:35
Very nice.
Thanks!
Another great video. I miss your narration though.
Thank you very much! Yes, this time I decided against narration. Makes it easier for me with editing. But narrated videos will come again.
Less is more!
To what are you referring to?
@@WeCanDoThatBetter I mean this project is a Minimalism artwork for me, sorry for my poor English skill, may cuz some Misunderstand
That's alu inserts?
I use sometimes polished inserts for aluminium on steel as they have a really low cutting force.
Практичнее было бы двигатель установить выше шпинделя (перевернуть).
Idk if u know wht Facebook marketplace is or not but if u do id look on there for someone selling a air compressor decently cheap… make it way faster and easier for u to clean the chips off parts, chuck, tool holder… and if u only want a certain amount of air coming out the blow gun u can put a regular on it…
I actually already got a small silent compressor. But for blowing chips away I haven't used it much. Mainly for cleaning parts.
....well... I wish you sell some :)
bfb2000 FTW
Wow, this drew out some constructive criticism! Well, much of it was constructive. Small victories for the win!
Люфт километровый в подшипниках отсюда слышно.
I've watched a quarter of this and can't stand any more. TALK through the work on your videos again or lose a subscriber
The last videos were narrated. Future videos will be. Sometimes I make non narrated videos as it is way easier in editing for me being a non native english speaker. But I invite you to watch the remaining 3/4 of the video as well;)
Success!
Nice looking unit, but your video is lacking important details of the spindle design. For instance: arrangement of the bearing shoulders, provision for preload, use of bearing retainer compound (or not), and so on. Drawings or sketches would help to illuminate your approach. Lacking all this I'm sorry to say: Rather disappointing!
You certainly can do that better… but take my like anyway. :)
Thank you very much! Highly appreciated ;)
nice workmanship, but seriously, bearings need to be a very light interference/press fit.... only the rear bearing should be a slip fit. it has to have some axial play to allow for thermal expansion.
that 'smooth" surface very quickly wears down and from there its all downhill as the outer races start to creep and yeah...
to mount angular contacts separated by a gap with no crush tube between? big no-no!
as you only copied someones design... that is a really bad spindle bearing layout. as it warms up, youll find it starts getting sloppy... nip it up again, and when it cools, the bearings will overload... races brinell, its even possible to shatter balls...
traditionally, its a pair of AC's back to back (front to front?) at the nose, outer races pressed, and clamped. then a crush tube, to clamp up the three inner races to the spindle. three? yes, there is the third bearing at the rear and that only has to be a plain radial (6200 in this case) as the thrust is already accommodated by the AC's... its just there to support the end of the shaft and the pulley.
as it is, its really only a small amount of work to improve on the design and do it so its bulletproof...
as your channel name states... YOU CAN DO IT BETTER!
if you buy the proper precision bearings, they come in pairs, pre-ground to give the required preload.
get rid of the seals, they just create excess heat, friction, have far too much grease in them anyway... if anything, use slideway/hydraulic oil and an oiling ring... high speed bearings do not appreciate being packed with grease. the design should have labyrinths so no gunk can get into the races, anyway. that is, "non-contact" seals...
Ну и нахер это было нужно? Жужжалка сверлилка на 20 ватт? Ни датчика оборотов, ни тензо датчтка...
Please 😅
Next time again ;)
Narrate!
Again I don’t watch if you don’t talk.🇦🇺
I can't force you but would be happy you watch it too even if this one is without narration. Can't make every video with narration.
If they care so much about human life, why are thousands of people dying in Gaza?
What's that hot to do with the price of bread?
What has this to do with the subject of my video?
@WeCanDoThatBetter ignore them mate..keep up the great video's...
No one should care about terrorists.
@@3d8d Yes, you are right, no state cares about the massacre committed by the terrorist state of Israel.
Yikes 😬
Have watched your channel for a while. I notice you have a tendency to overcomplicate solutions. Any ideas why you don't try to keep things simple?
Hi and thanks for your feedback! You might be right. I want the things to be of high quality standard so that's what seems like overcomplicating things I guess. What do you think is overcomplicated on this milling spindle build?
@@WeCanDoThatBetter mostly just the over complicated setups and how hacks the jobs feel. Complexity doesn’t equal better. Maybe because there’s no real use case behind the form or function?
@@porroapp It's a CZcams channel where he is making stuff he decides is useful for him and also that makes a good video to watch, it's not like he's running thousands of parts for a production job that needs to be as efficient as possible.
What did you find complicated about this build? It's a spindle, a motor and a belt in between?
@@GeorgeAlex-j6k see my earlier reply
I don't really see the point of making this, the work you put it to in your example could be done with average vertical mill.
He doesn't have an average vertical mill. He has a Proxxon kinda mill thing.
This is all just wrong bro lol sorry nice video though
All just wrong? Why?
@@WeCanDoThatBetterthat dividing head of yours is worthless. You're just eyeballing the wholes. Being a supposed to be pressed and preloaded. I pretty much stopped watching after that but seems like other people says it didn't even work which is what I expected