20pc metric R8 collets

[PeterT]

I bought these a while back & finally got around to trying them out. I pulled 5 of them just randomly matched to very new metric carbide end mills. They all all measured within 0.0005" TIR (without really knowing how the EM's themselves compare). Good enough for the purposes I had in mind.

I did some milling with them today, no problem. But it actually reminded me of why I prefer my ER holder. With R8 you have to kind of hold the EM into the collet by the Ouchy end & simultaneously tighten the drawbar with the other hand, which is a bit of stretch for me (Bridgeport clone). In the past I've dropped EM's out of the collet if its not quite tight enough initially. All it takes is a low altitude drop to chip the edge & bye-bye EM. Maybe there is a better way to do this, I dunno. With an ER holder you put EM in collet & snug the nut, everything is there right in front of you.

This is the Ebay store.

Security Measure

www.ebay.ca

 

[RobinHood]

Yup, I know the pain (literally & figuratively). Cut myself too many times. So now I use a cotton cloth and wrap the end mill in it first (the cutting bits) and then start the process of inserting/tightening them in the R8 collet. Seems to work and has the advantage that if I drop it, it won’t chip the edge. I also use the cloth to remove the EM from the collet.

Good run-out result; quite amazing for that price…

 

[jcdammeyer]

I bought these a while back & finally got around to trying them out. I pulled 5 of them just randomly matched to very new metric carbide end mills. They all all measured within 0.0005" TIR (without really knowing how the EM's themselves compare). Good enough for the purposes I had in mind.

I did some milling with them today, no problem. But it actually reminded me of why I prefer my ER holder. With R8 you have to kind of hold the EM into the collet by the Ouchy end & simultaneously tighten the drawbar with the other hand, which is a bit of stretch for me (Bridgeport clone). In the past I've dropped EM's out of the collet if its not quite tight enough initially. All it takes is a low altitude drop to chip the edge & bye-bye EM. Maybe there is a better way to do this, I dunno. With an ER holder you put EM in collet & snug the nut, everything is there right in front of you.

This is the Ebay store.

Security Measure

www.ebay.ca

Can you spell power draw bar?

 

[phaxtris]

oh man i paid that much for 10pc just recently! i guess i should have looked harder! good deal

 

[little ol' e]

Maybe there is a better way to do this, I dunno. With an ER holder you put EM in collet & snug the nut, everything is there right in front of you.

Well, except for the old style TG100 collets that were never very good to begin with.
I'm a big fan of ER collets myself. Other than indexable tooling, everything else goes into a collet.

 

[PeterT]

BTW the same outfit, AllIndustrial, distributes an IMP R8 collet set under the name 'Colton'. When I spoke to them they said it was a bit better than the 'regular' R8 set. I was specifically after metric (no Colton) so I just crossed my fingers the runout would be similar. Shipping was straightforward, arrives USPS with tracking. They have some other goodies of interest, house brand & name brand.

Colton Industrial Tools 20110 | 25 Piece Ultra Precision R8 Round Collet Set, 1/8" - 7/8" x 1/32" Increments, 0.0005" Accuracy

We distribute top-quality industrial tools and machine shop supplies at the best prices. View our collection of CNC machinist supplies and tooling packages.

allindustrial.com

 

[PeterT]

Can you spell power draw bar?

MILWAUKEE CORDLESS? LOL

 

[phaxtris]

MILWAUKEE CORDLESS? LOL

That's what I use, a Milwaukee M12 electric ratchet, it came with an impact I bought a while back...doesn't have much jam...but enough for an r8 drawbar