Congratulations on making a very nice looking tool. Glad you got it working how you want it to. I also appreciate how you included your "developmental research" in your video. So many people don't understand that sometimes it can take longer to make the tool than what it does to do the whole job.
+Leon Kitshoff Leon, hi. Thanks for the nice comment and for the support. Yes, it is exactly like what you wrote. Thanks. I actually did this tool because I needed to make several dovetail cuts for quick changing tool holders for lathe... and I enjoy a lot to make the useful tools helping me working better. Of course I could buy the tool at eBay or somewhere else, but it's just not the same! And since I had already the inserts for my lathe tools I decided to use them also for this tool, that can be useful for a long time... instead of the regular HSS cutter... But in the middle of the process I actually didn't know how it will work at the end. I didn't make any plans for it, I didn't make any calculations to spoil the fun. I was just hoping to be like it is now, and that it's working well. But of course because it was for the first time I made some mistakes and together with them I have learned something useful and all of this I wanted to share with all of CZcams users and to help someone to not make the same mistakes. And now I'm learning even more with some useful tips and some bad critics from all others. But like you said some of them don't know or just don't want to accept the opportunity of this video, and some of them are just rude... That's why I'm thanking you again for the supportive comment. Best regards, Zmago
(A) Drill bits undo itself is also popular with some cordless drills equipped with mechanical spindle stopper. The impulse at stop cause the chuck sleeve to unwind at the chuck, causing release of drill. In this case each round the insert bites the work transmits a blow to chuck sleeve in an unwind direction. (B) To reduce cutting impact force/fatigue? (1) Use a lead angle < 0 to axis, so insert upper corner meets with work before second corner. (2) Use an effective rake angle > 0, to reduce work force. (3) Use a radial angle > 0, to avoid 2nd edge wear. (4) Use insert recess angle =/> 7degree. (5) Use smallest insert matching work depth.
Nice Job! I did notice that there is no support for the inside margin of the insert other than the cutting edge touching the insert pocket. I would recommend to either add a small step at the back of the insert pockets or angle the back of the pockets to provide clearance for the insert's relief angle that is near the center of the head. Doing so will preserve the unused edges.
Yea it has a cutting edge as for a directional lathe, Climb millings not going to work lol. Look at your insert where it disintegrated on the seated area. But nice tool for a manual, just back it off the cut.
Not bad.... Will you be doing a build video like the apmt milling cutter? Btw, commercial dovetail cutters work exceptionally well both climb and conventional milling, i have also pushed doc to the max at around 4mm. Mines a hss cobalt. You will find the tpmr insert better suited due to its 11 degree relief angle. not too certain if its got a screw hole though. I have used the same tcmt inserts to make a large flycutter, and it performed poorly due to the same reason, too little relief angle.
Naren, hi Thanks for watching and for a nice comment. I'll try my best to do a build video as well (some day), just need to find some spare time... Thanks for the tip of the TPMR insert, I will search for it. Best regards, Zmago
Δημήτρης Hi. Thanks for the comment and for watching. Yes, what can you do. I wasn't expecting the cutter to fall down, but until it doesn't hurts me, it's ok. It could damage the piece and the cutter, destroy a few working hours, but yes, in that case it was all fine. I was lucky and calm... Ha ha ha. Be well, Zmago
Hi. Thanks for watching and for the question. Well, I have been buying all these over eBay. Right now I can't exactly find with which seller did I bought it, but I have checked and it offered me this: Hi! I found this on eBay and thought you might like it! Check it out now! 20pcs Insert Torx Screw for Carbide Inserts Lathe Tool Screwdriver M1.6 to M4: r.ebay.com/ElAqXY Please check which size of the thread do you need and what type of the head do you need for the insert. And then search for it. I think this is the easiest and the cheapest way... Best regards, Zmago
+ROGER HOUSTON Hi. Yes I'm planning to do a Dovetail cutter of 55° angle. So I will than record the whole process. Thanks for watching and for the comment. Regards; Zmago
+Перспективный Hi. Sorry for late answer. Here is the direct link. rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F292414420152
I think that dovetail cutter is awesome and it looks great! good job. I have to wonder though why so much rpm and feed you're going to kill the insert imo.
+Micscience Hi. Thanks for watching and for the comment. I have tried to go with slower speed -1400rpm-, but actually the sound of the machine was not so good. It sounded that machine would take apart... I don't know, maybe my machine doesn't have enough torque at that speed... So I tried with higher speed and it was so much better. And since these are the carbide inserts for machining the hard steel it is normal to have higher operating speed... it's like 3 times higher than ordinary HSS cutting tools. So if you don't have enough speed you will actually destroy the insert faster than with the proper speed. My machine has the highest speed 2900rpm, but I believe that if I could go faster than this it would be even better... Again, if you don't feed enough fast with high (rpm) speed, than the cutter is just sliding too much on to the material which is not good. You can easily damage the cutting edges of the inserts because the friction is too high and becomes too hot... And the surface is a mess. Zmago
Sc Patent I learned that higher rpm creates heat which destroys tools however I am aware of higher feed rates help the bit relative to the rpm. Where I have heard of high rpms when cutting is through cnc our using routers and stuff like that but I am no expert so carry on as usual. I said that because that is what I learned from other machinists on YT to be honest.
Micscience Hi. Yes, I agree about the high rpm related to higher heat, but with this carbide cutters is now all changed and hard to believe... I just follow some pointers I have read about the specification of materials and my feeling. I'm also not a professional machinist (my profession is an Prosthetist and orthotist...), but I like to try different varieties... sometime also risk a lot... That's how I like to learn on my own... Thanks for the comment. Be well. Zmago
because his machine is flimsy so he has to take lighter faster cuts than the intended load and speed for that insert. It would be okay if the inserts he used were the very sharp type. Like the K10 geometry for aluminium.
+Philipp Danz Hi. Since I already had a pack of these "triangle - 60° angle and with 7° relief angle" TCMT inserts, I've used them of course. And with these triangle inserts there is only one side wall which is sitting at the tool, and yes it is always some movement present with such force while machining... I agree, the TDMT with 15° relief angle would be better choice if I could get them... You gave me an idea to make and try with DCMT. Thanks. Regards, Zmago
Phil, I've had good luck with a TCMT, I did have to move the insert cutting edge slightly in front of centerline to achieve clearance but I'm seem to get good finishes from it. You can check it out plus.google.com/u/0/photos/109048975510143432172/album/6445973300341939841?authkey=CMOZz-i6z5CT2QE
2:30 There is no reason to continue the cut if the tool is slipping. Stop the machine and re-tighten the chuck. The tool got stuck several times while the chuck was still spinning, marring the tool and the chuck jaws.
yea .. don't try to show off your tool in aluminium. go for the hardest material if you wanna show it off, because milling in aluminium can hide when your tool is rubbing, and smear that soft buttery aluminium. and you still got rubbing marks after sanding it. You have to test it in a CADCAM program for the desired feed. Then give 50% more allowance for chip packing.
+meocats Hi. That is cold rolled steel machining... I have toxicated my self with aluminium, so I don't want to work with aluminium any more... I don't understand your meaning about "showing off". Please explain. Thanks for watching. Zmago
+Slave2Outdoors Hi. These are the carbide inserts and they can stand even much more pressure and speed. If I could I would try it with 5000 RPM... But my machine doesn't have enough rigidity, so when I go with slower speed, than it sounds like motor and gears would collapse. So this 2900 RPM with this machine is the optimum. The sound the feeling, the cutting surface. All is much smoother with this speed... With HSS cutters I go much slower... Thanks for watching and for the comment. Regards, Zmago
MadHatter123456 Hi. This machine has not enough torque, and it is also not rigid enough. So with more speed I get less vibration and the surface is better. And the carbide insert cutter can stand up to this speed and also the heat with no insignificant damage. (I'm talking about when using just carbide insert cutters), with normal HSS end mills, I go more slowly - with proper speed regarding to different metal. But I wish to have a better - more rigid machine, to try with lower speeds... someday soon I hope.! Otherwise I agree with you. Thanks for watching. Regards; Zmago
Sc Patent Not enough torque? Then why go to max feed rate? Slow the feed rate and you will get better surface and the cutter will not cut in the horisontal surface( dig in)
Benjamin Harris Hi. Yes I agree. That's why "the wrong position..." in the title. And if you've seen the whole video, there is also the graphic reposition of the inserts how it should be. Thanks for the comment and for watching. Best regards; Zmago - SC Patent
sorry for my English:-( If you move the insert as a graphic demonstration the corner will be wrong. I tried and I lost one day to understand why the angle was greater than 30 degrees.
Yes, you are right. At that time I didn't know that the original relief of 11° would not be enough if the cutting edge is placed at the center, so later I sanded for the relief a little bit more. You could see it at the end of the video... Didn't you see it at 7:21 ? Thank you for watching and for the comment.
I could have happily watched all of this video if it weren't for the silly music blaring. I don't get why anyone thinks music improves an informative engineering video. Nice cutter, very good result but please leave the bloody music out.
Yes, I agree. This was several years ago when I thought music is necessary. Of course over the time I have stopped adding music to the videos. Unfortunately music is still there on some videos and I will not go editing videos again to put it off. Sorry about that. Nevertheless, thanks for the comment and for watching. Regards, Zmago
i subscribed but i want you to put more effort into your next design. It looks like you drew this on a napkin and then 15 minutes later started milling the tool. all the best.
CMAenergy Thank you for your comment. I agree with you. Everyone needs some experience and after a while, after several videos, after trying to mage a good video with some educational purposes... I have also came to a point, where I totaly agree with you. I don't put music to my videos anymore... Sorry for this one. I apologize to you. But you could be nicer as well to all of us, who makes something interesting on CZcams. We all are just learning from our mistakes. And time makes us better. Anyway thanks for watching... Zmago
Congratulations on making a very nice looking tool. Glad you got it working how you want it to. I also appreciate how you included your "developmental research" in your video. So many people don't understand that sometimes it can take longer to make the tool than what it does to do the whole job.
+Leon Kitshoff
Leon, hi.
Thanks for the nice comment and for the support. Yes, it is exactly like what you wrote.
Thanks.
I actually did this tool because I needed to make several dovetail cuts for quick changing tool holders for lathe... and I enjoy a lot to make the useful tools helping me working better. Of course I could buy the tool at eBay or somewhere else, but it's just not the same! And since I had already the inserts for my lathe tools I decided to use them also for this tool, that can be useful for a long time... instead of the regular HSS cutter...
But in the middle of the process I actually didn't know how it will work at the end. I didn't make any plans for it, I didn't make any calculations to spoil the fun. I was just hoping to be like it is now, and that it's working well. But of course because it was for the first time I made some mistakes and together with them I have learned something useful and all of this I wanted to share with all of CZcams users and to help someone to not make the same mistakes. And now I'm learning even more with some useful tips and some bad critics from all others. But like you said some of them don't know or just don't want to accept the opportunity of this video, and some of them are just rude...
That's why I'm thanking you again for the supportive comment.
Best regards, Zmago
Great job! You and I both learned a few things and you didn't give up!
Well done! It's a capable tool and gets the job done! Very nice work!
WOW MAN!!! IS AN AMAZING TOOL, EASY TO MAKE, AND LOW COST, CONGRATULATIONS FROM ARGENTINA
+Marcelo Rondan
Marcelo, hi.
Thanks.
Exactly like you said, and it last forever...
Best regards from Slovenia. Zmago
That is what is nice about a Weldon shank they never spin. Good job on the cutter.
Muchas gracias por tu instrucción....por compartir tus conocimientos....hice uno similar pero con cuatro pastillas triangulares.......
(A) Drill bits undo itself is also popular with some cordless drills equipped with mechanical spindle stopper. The impulse at stop cause the chuck sleeve to unwind at the chuck, causing release of drill. In this case each round the insert bites the work transmits a blow to chuck sleeve in an unwind direction.
(B) To reduce cutting impact force/fatigue?
(1) Use a lead angle < 0 to axis, so insert upper corner meets with work before second corner.
(2) Use an effective rake angle > 0, to reduce work force.
(3) Use a radial angle > 0, to avoid 2nd edge wear.
(4) Use insert recess angle =/> 7degree.
(5) Use smallest insert matching work depth.
good job,
Very enlightening I was able to understand why make an exit with your practice hehehe
great job.
Good job! Very nice tool.
Shortribs Longbow
Hi.
Thanks.
Nice one mate
Nice Job! I did notice that there is no support for the inside margin of the insert other than the cutting edge touching the insert pocket. I would recommend to either add a small step at the back of the insert pockets or angle the back of the pockets to provide clearance for the insert's relief angle that is near the center of the head. Doing so will preserve the unused edges.
Hi.
Yes, that is also necessary to do with the new cutter that I will make...
Thanks for watching and for the comment.
Zmago
Good idea!
very nice job on the tool !
+Rob M
Thanks, Rob
Adorei, vou tentar fazer um pra mim, valeu.
Perfect Usinagem tools
Хорошая работа!
I belive that the insert TPMT have a very aplication, because the insert exit 11 deg
Yea it has a cutting edge as for a directional lathe, Climb millings not going to work lol. Look at your insert where it disintegrated on the seated area. But nice tool for a manual, just back it off the cut.
Not bad.... Will you be doing a build video like the apmt milling cutter? Btw, commercial dovetail cutters work exceptionally well both climb and conventional milling, i have also pushed doc to the max at around 4mm. Mines a hss cobalt. You will find the tpmr insert better suited due to its 11 degree relief angle. not too certain if its got a screw hole though. I have used the same tcmt inserts to make a large flycutter, and it performed poorly due to the same reason, too little relief angle.
Naren, hi
Thanks for watching and for a nice comment.
I'll try my best to do a build video as well (some day), just need to find some spare time...
Thanks for the tip of the TPMR insert, I will search for it.
Best regards, Zmago
Thanks
Sc Patent Thank you for this comprehensive video 😁
Manda aqui para Brasil muito top gostei demais
SHOWWW ARTESÃO DE MÃOS CHEIAS ! PERFECT
+eduardo pinto
Hi.
Thanks.
Regards; Zmago
I loved how calm you were....i will be like "God...damn...m%$((%...f$(*#$(".
Δημήτρης
Hi. Thanks for the comment and for watching.
Yes, what can you do. I wasn't expecting the cutter to fall down, but until it doesn't hurts me, it's ok. It could damage the piece and the cutter, destroy a few working hours, but yes, in that case it was all fine. I was lucky and calm... Ha ha ha.
Be well, Zmago
hey , where the best place to buy screws at,,, the good one's that hold carbide inserts on,,, thanks for video
Hi. Thanks for watching and for the question.
Well, I have been buying all these over eBay.
Right now I can't exactly find with which seller did I bought it, but I have checked and it offered me this:
Hi! I found this on eBay and thought you might like it! Check it out now! 20pcs Insert Torx Screw for Carbide Inserts Lathe Tool Screwdriver M1.6 to M4:
r.ebay.com/ElAqXY
Please check which size of the thread do you need and what type of the head do you need for the insert. And then search for it. I think this is the easiest and the cheapest way...
Best regards, Zmago
Good job...
Maybe coolant would help?
How about making a t slot cutter with the same method
HEY CAN YOU SHOW US HOW YOU MADE YOUR BIT FROM THE START THANKS ROGER HERE
+ROGER HOUSTON
Hi. Yes I'm planning to do a Dovetail cutter of 55° angle. So I will than record the whole process.
Thanks for watching and for the comment. Regards; Zmago
and where you can buy inserts? Please give a link to insert.
+Перспективный
Hi.
Sorry for late answer.
Here is the direct link.
rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F292414420152
I think that dovetail cutter is awesome and it looks great! good job. I have to wonder though why so much rpm and feed you're going to kill the insert imo.
+Micscience
Hi. Thanks for watching and for the comment.
I have tried to go with slower speed -1400rpm-, but actually the sound of the machine was not so good. It sounded that machine would take apart... I don't know, maybe my machine doesn't have enough torque at that speed... So I tried with higher speed and it was so much better. And since these are the carbide inserts for machining the hard steel it is normal to have higher operating speed... it's like 3 times higher than ordinary HSS cutting tools. So if you don't have enough speed you will actually destroy the insert faster than with the proper speed. My machine has the highest speed 2900rpm, but I believe that if I could go faster than this it would be even better...
Again, if you don't feed enough fast with high (rpm) speed, than the cutter is just sliding too much on to the material which is not good. You can easily damage the cutting edges of the inserts because the friction is too high and becomes too hot... And the surface is a mess.
Zmago
Sc Patent
I learned that higher rpm creates heat which destroys tools however I am aware of higher feed rates help the bit relative to the rpm. Where I have heard of high rpms when cutting is through cnc our using routers and stuff like that but I am no expert so carry on as usual. I said that because that is what I learned from other machinists on YT to be honest.
Micscience
Hi.
Yes, I agree about the high rpm related to higher heat, but with this carbide cutters is now all changed and hard to believe... I just follow some pointers I have read about the specification of materials and my feeling. I'm also not a professional machinist (my profession is an Prosthetist and orthotist...), but I like to try different varieties... sometime also risk a lot... That's how I like to learn on my own...
Thanks for the comment.
Be well. Zmago
because his machine is flimsy so he has to take lighter faster cuts than the intended load and speed for that insert. It would be okay if the inserts he used were the very sharp type. Like the K10 geometry for aluminium.
+meocats
Hi.
True.
Regard; Zmago
You have any for sale?
The insert seat is'n sable enough. You must tilt the insert and/ ore you take a TPMT... instead a TCMT...But it's better to take a DCMT.
+Philipp Danz
Hi.
Since I already had a pack of these "triangle - 60° angle and with 7° relief angle" TCMT inserts, I've used them of course. And with these triangle inserts there is only one side wall which is sitting at the tool, and yes it is always some movement present with such force while machining...
I agree, the TDMT with 15° relief angle would be better choice if I could get them...
You gave me an idea to make and try with DCMT. Thanks.
Regards, Zmago
Phil, I've had good luck with a TCMT, I did have to move the insert cutting edge slightly in front of centerline to achieve clearance but I'm seem to get good finishes from it. You can check it out plus.google.com/u/0/photos/109048975510143432172/album/6445973300341939841?authkey=CMOZz-i6z5CT2QE
I made this type and one using a DCMT insert, the DCMT inset one worked significantly better. Finish on the bottom surface was a lot better.
2:30 There is no reason to continue the cut if the tool is slipping. Stop the machine and re-tighten the chuck. The tool got stuck several times while the chuck was still spinning, marring the tool and the chuck jaws.
yea .. don't try to show off your tool in aluminium. go for the hardest material if you wanna show it off, because milling in aluminium can hide when your tool is rubbing, and smear that soft buttery aluminium. and you still got rubbing marks after sanding it. You have to test it in a CADCAM program for the desired feed. Then give 50% more allowance for chip packing.
+meocats
Hi.
That is cold rolled steel machining...
I have toxicated my self with aluminium, so I don't want to work with aluminium any more...
I don't understand your meaning about "showing off". Please explain.
Thanks for watching.
Zmago
Why are you doing 2900 rpm?
+Slave2Outdoors
Hi.
These are the carbide inserts and they can stand even much more pressure and speed. If I could I would try it with 5000 RPM...
But my machine doesn't have enough rigidity, so when I go with slower speed, than it sounds like motor and gears would collapse. So this 2900 RPM with this machine is the optimum. The sound the feeling, the cutting surface. All is much smoother with this speed...
With HSS cutters I go much slower...
Thanks for watching and for the comment.
Regards, Zmago
Sc Patent
Yeah, but the steel is the problem here, not carbide. Steel will not accept such speed and feedrate .
Hi,can you send me this cutters drawing?
Hello. I did this without any prior drawings or plans. I'm sorry, but I have nothing to send you. It was an idea and implemented quickly.
Apa nama pisaunya
I see tool has allot of runout which causes distortion of angle and finish..better go one flute then.
where is the "how to" part ?
Use weldorn holder
As always with when you're at the machine: LESS SPEED! You're killing your cutters, drill bits and inserts all the time!
MadHatter123456
Hi.
This machine has not enough torque, and it is also not rigid enough. So with more speed I get less vibration and the surface is better. And the carbide insert cutter can stand up to this speed and also the heat with no insignificant damage. (I'm talking about when using just carbide insert cutters), with normal HSS end mills, I go more slowly - with proper speed regarding to different metal. But I wish to have a better - more rigid machine, to try with lower speeds... someday soon I hope.!
Otherwise I agree with you.
Thanks for watching.
Regards; Zmago
Sc Patent
Not enough torque? Then why go to max feed rate? Slow the feed rate and you will get better surface and the cutter will not cut in the horisontal surface( dig in)
Holy shit, why are you machining in dry ?
need relief angles mate
Benjamin Harris
Hi.
Yes I agree. That's why "the wrong position..." in the title. And if you've seen the whole video, there is also the graphic reposition of the inserts how it should be.
Thanks for the comment and for watching.
Best regards; Zmago - SC Patent
And the graphic demonstration is wrong, because you moved the inserts up off the tangent radius line.
sorry for my English:-( If you move the insert as a graphic demonstration the corner will be wrong. I tried and I lost one day to understand why the angle was greater than 30 degrees.
3:16 just look at that cutting edge, you clearly didn"t give any relief to that insert
Yes, you are right. At that time I didn't know that the original relief of 11° would not be enough if the cutting edge is placed at the center, so later I sanded for the relief a little bit more. You could see it at the end of the video... Didn't you see it at 7:21 ? Thank you for watching and for the comment.
The word is then
I could have happily watched all of this video if it weren't for the silly music blaring. I don't get why anyone thinks music improves an informative engineering video. Nice cutter, very good result but please leave the bloody music out.
Yes, I agree. This was several years ago when I thought music is necessary. Of course over the time I have stopped adding music to the videos. Unfortunately music is still there on some videos and I will not go editing videos again to put it off.
Sorry about that.
Nevertheless, thanks for the comment and for watching.
Regards, Zmago
Please leave out the crappy muzak! It's annoying, and obscures the sounds coming from the process.
42CrMo4 isn't "very hard steel"... try to cut e.g. X160CrMoV121 or other steel with more than 1% carbon.
Interesting video spoilt by loud ‘repetitive music’.
i subscribed but i want you to put more effort into your next design. It looks like you drew this on a napkin and then 15 minutes later started milling the tool. all the best.
meocats dick
Anyone who uses any music has no idea how offensive it is to the listener, Disgusting music !
CMAenergy
Thank you for your comment. I agree with you. Everyone needs some experience and after a while, after several videos, after trying to mage a good video with some educational purposes... I have also came to a point, where I totaly agree with you. I don't put music to my videos anymore...
Sorry for this one. I apologize to you. But you could be nicer as well to all of us, who makes something interesting on CZcams. We all are just learning from our mistakes. And time makes us better. Anyway thanks for watching... Zmago
Please remove this terrible muzak
Horrible music