How to sharpen end mills on a surface grinder Part 2
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- čas přidán 20. 08. 2024
- I going to show you how to sharpen the flutes on a end mill using a Weldon end mill sharping gig on my surface grinder.
Link to part 1 • How to Sharpen End Mil...
To buy the weldon end mill sharpened $200 plus shipping email me
dalederry@gmail.com
I love to watch you work and explain the whys and wherefores of what you are doing, reminds me of a machinist that I use to visit when I was a boy.
Молодец, не лишён артистизма. Подписался.
There is supposed to be a based that adjusted the angle with the finger on the center line of the spindle.your finger assembly is on backwards.Weldon makes a chart for the first and second back off angle and land width.you will need a dust collector system eventually
I have sharpened thousands of endmills with a Weldon fixture it is great tool.I also made carbide tipped fingers.
I really enjoy your videos
HI Mike. Great comments. yes I know the finger was on backwards I did it so I could photograph it better, what I should have done was put the fixture on a riser block so I would have had more room to just the knob. Keep up the great comments. :-)
a rule of thumb is the first land should be 1/32 wide and drop off ..005 on an indicator and the second drop off .01 in the same distance.
Silver solder a piece of carbide on a thicker finger and stoning the sharpness off will give a smoother action.
To grind a tapered mill you need a cutter grinder and adjustable angle
cutter head.
Set the head 5 degrees for example and traverse the table to get the grinding motion.
The finger needs to be mounted
on the wheel head as close to the wheel as possible.
The flute will not be parrell to the cutter center line giving you an error on the finish ground flute.
I believe the finger should be almost touching the wheel on all mills.
cheers.
t.o.m.
Hi Dale,
It's worth mentioning that reground endmills are undersize.
Blindingly obvious you'd think, but I've heard of quite a few people being caught out and moving over half the tool diameter as marked on the shank!
I wouldn't always trust the marked size on a new cutter if it really mattered to what I was doing.
On practice I've heard of is to grind a fine ring on the shank every time you sharpen.
Hi Paul, You are right I should of said somthing. I like your Idea about grinding a mark on it. to show how many times it has been sharpen.
Thanks for your commet :-)
@@BuildSomthingCool I think when he said grinding a fine ring he wasn't mean to show how many times it has been sharpen but to measure exact diameter after being gound
First time I ground an end mill was done on a Weldon Air bearing fixture.
I did tour the Weldon factory when I sold tooling. Every 3/16" shank end mill they sold was hand ground on an air bearing fixture.
HI Ray, Wow that is crazy. that is a lot of work.
Dale I liked these videos about end mill sharping. Can you also show how to sharpen end mills if you don't have a surface grinder. Some of us are hobby machinist with just a mill a lathe and a saw. keep up the good work your are doing with these videos.
Great videos on end mill sharpening. Thanks.
Thanks My friend
The Weldon fixture costs about 500-1000 dollars on ebay by the way, and you STILL need a surface grinder (or a properly rigged milling machine with a wheel attached to it) in order to use it. For that much you might as well buy the Shars Tool and Cutter grinder... it's about 800 dollars and it does ends, flutes, etc. in that one machine.
The end grinding fixture is good if your flutes are in a reasonably good condition (most the time you aren't using past the first .05" of the flutes) and it will do the job. It's also cheap too. The spindex fixture is also fairly cheap too and can work reasonably well too.
Buying endmills get expensive very fast and some import end mills are not properly sharpened out of the box.
Also my end mill grinding fixture (made by Shars) does not say "made in China" anywhere... so you might want to tell the viewers which side to use (one side is wider than another)
fuck yes! thank you Dale!
I just bought a tool cutter sharpener with an air spindle for sharpening flutes without the foggiest of clues on how to use it.
what perfect timing.. open up youtube to try and look for some more videos and bam on my front page from metal tips and tricks
Hi Dale, interesting instructions on basic sharpening, after this clever ones can adapt.... This should push me to put my Clarkson back in service...
Cheers, Pierre
HI Pierre. Yes you should get your grinder up and running. What are you waiting for? LOL
Hi Dale,
Those hammers took ALL of our available time lately, soon back to our regular programming... ;)
Put cutter rest on level centerline of endmill, raise air fixture up on its pivot that's better than lowering tooth rest each time . Make a block that raises fixture 6 degrees for primary and 20 for secondary
If you want to use your spindexer, you can loosen the collar locking screws and the spindle will slide in and out, no need to use the x travel of the table. Making a finger, for alignment, should be no problem to someone who has a need for sharp end mills.
HI Chris. Interesting idea. My concern it the finish on the spindle is not smooth enough to give you a good grind, but give it a try and let me know how it works out.
I think it is smooth enough, well on mine the ring kept slipping when used for normal mill work. Don't old your breath, but if I do I'll let you know.
Was watching this when my wife walked by and watched for second....she was wondering why you are able to wear your wedding ring when I tell I can't wear mine to work because of safety reasons....thanks
Dale's not being very helpful with this video is he?
I'd say because Dale pays his own check while someone else pays yours. But that's not very helpful either ...
Each person can take safety as far as they want to. My wife and I are not silly about these things and do not wear our rings unless we go "out". They are never on at home for anything, work or play.
HI Steve, Sorry! I did mean to get you into trouble.
Dale is a good looking guy, Women are always currious weather he is engaged or not.
I've watched hundreds of machine shop videos, and in every video I wonder how da fuck does everyone keep their shop so fucking clean!!!
These guys are married.
Nice use of sound blankets.
Hey, you were not supposed to see that. LOL
Excellent tips.
Thanks a lot.
Regards
Well done silver fox!
Hey bud! DoRite Fabrication just mentioned you and asked us to greet and subscribe to you (shout out) and we're here to welcome and subscribed and liked your video & channel. He is an awesome CZcamsr and we're glad to know that you have contributed enough to be mentioned on his channel. Congratulations to you and hope to see you again soon my friend! :D
Very nice job 👍!
My question what kind of the grinder machine is?
great vid! Do you stick your tongue out to the left or the right when you are sharpening?
Two thumbs up!!! Awesome
As usual very informative. Sharpening end mills is not easy even with the Weldon fixture. Good on the huge mills most people use. Will it sharpen a 3mm end mill? (I should say that anybody can sharpen an endmill. Whether the mill will cut after you sharpened it is another matter entirely.) For example my little Proxxon end mills can be plunged; they are what the UK calls "slot drills". Inspired by your last video I took a good look under magnification, and it, too, has more angles than a politician. My advice to beginners would be to read up on sharpening and understand what the terms mean. In my case I must also consult the German literature because Proxxon is in Germany. And I would never try to do it at all without a fixtrure. And preferably a dedicated T & C grinder such as Stefan Gotteswinter's.
nice video Dale. I'm guessing you probably couldn't do that to many times otherwise you would end up with a slightly smaller cutter
I use a Darex end mill sharpener that seems to work really well for my needs. What's your opinion on Darex sharpeners?
This will mess up my manicure.
Great video!
LOL
Hey Dale, I love this method of grinding endmill OD’s. Unfortunately I don’t have a fixture like this. I sharpen all my diameters on a Brown and Sharpe No.10 in between centers. I noticed the collet you’re using utilizes a set screw. Does this cause any runout on the O.D? The reason I ask this is if the set screw were to push the endmill to one side of your collet. Great video, informative content. As a tool and cutter grinder in my youth I always look up to the older generation (no offense) for counsel and knowledge.
Dale that flute stop would seem to be way to flexible...and the holder for it looks to have been modified?
I'd be thinking a small round pin with a tapered, radiused end would be more rigid and able to better handle the necessary force to keep the flute on the stop.
I'd love to have a way to touch up endmills in the shop. I have a nice Niagara 3/4" cobalt rougher that's just dull from use and would love to give it some edge. Ever try to grind the front flute face of a rougher? :-)
I think you're right about the stylus it would work better if it was round. I have not tried to sharpen a roughing mill.
How to grind helical?
Hey Dale, you are not the first one to say "sharpen the secondary cutting angle" This get me every time because wouldn't it actually be relieve the secondary angle?
Paldies, labas idejas 😎
I thought it sounded like it was cutting heavy on one side at the start and heavy on the other at the end . Like it was bent or mounted in the collet at an angle. OR, could have been a bad previous grind.
Hi Cheerto4493. It was a bad previous grind.
The proof is in the eating, right? Somewhat disappointing that you did not show the endmill working in the end. Otherwise quite enjoyable and informative.
Keep up the good work.
Hi neistridlar, Sorry about that :-(
Can you sharpen higher flute counts with a setup like this? 4? 6?
wouldn't doing this very slightly change the cutting diameter of the end mill? so if you were doing a precision hole and using the end mill in a plunge cut fashion your going to want to use a reamer afterwards right?
Hi John, You're correct that sharpening always reduces the end mill diameter. In the example you stated a nominal size reamer would be needed to bring the hole up to size.
you are going to sale the two of the can you tell me how much you are asking.
Ok I got one for you. How do you cut a taper on an end mill? I need 2.8 degrees
Hey dale just curiously wondering if you have ever worked with pcd or sharpened it at all. I work with ceramics and use it all the time just wondering if you have ever used it and what your thoughts were about PCD
Will this work with a tapered spiral reamer?
Do you not feed the end mill in from the outside, because of the corner of the flute may break or is it just your own way to do it?
How user, It's was the way I learned it.
I don't see how you cut any relief without angling the wheel. Whenever I lower the stylist it just rotates the endmill. Am I missing something?
Im sorry but I dont have time to watch this video all the way through, however I noticed your foute index finger is bending and flexing all over the place. Not sure if you addresed this but it should be very solid for accurate flute positioning.
HI Andre, Yes, flexing is a problem on those fixture. I kind of address it on how one center it up on the flute, but I should have gone into more detail.
Thanks for the comment. :-)
and the diameter?
Where did you get that aprin?
that's wrong methed mr..
Any reason with your channel is exploding lately in terms of subs and views ? I think somehow CZcams is favoring certain kind of contents and fading away other, but I can't really tell..
Not a really practical or useful video.......Weldon devices are as rare as hen's teeth and not many people even have a surface grinder........I had one that was fitted to an old KO Lee cutter grinder, and it was an air bearing type.
At least tell is where to find the formulas... ffs...