Tool Holding

[dabear3428]

i have a small grizzly mill G0758 with R8 spindle are R8 collets good for holding end mills? any limitations I should be aware of?

 

[jarhead]

yes use the r8 for endmills

 

[dabear3428]

yes use the r8 for endmills

thanks

 

[brasssmanget]

I've read that some prefer the dedicated EM holders with locking/set screws to hold them snug - I use R8's with no issues, but I am just a hobby machinist and not professional,,,,

 

[dabear3428]

I've read that some prefer the dedicated EM holders with locking/set screws to hold them snug - I use R8's with no issues, but I am just a hobby machinist and not professional,,,,

thanks, are there and pitfalls i should be aware of?

 

[RJSakowski]

Endmills in R8 collets can slip under heavy load. This usually occurs with larger end mills and heavy cuts. In most situations slipping won't be an issue. I use a system known as TTS where tooling is mounted in a tool holder that has a 3/4" shank that seats in a 3/4" R8 collet. I have only experience slipping a few times in the past 12 years. Usually, this is a result of not tightening the drawbar sufficiently..

 

[dabear3428]

Endmills in R8 collets can slip under heavy load. This usually occurs with larger end mills and heavy cuts. In most situations slipping won't be an issue. I use a system known as TTS where tooling is mounted in a tool holder that has a 3/4" shank that seats in a 3/4" R8 collet. I have only experience slipping a few times in the past 12 years. Usually, this is a result of not tightening the drawbar sufficiently..

good to know, my g0758 cannot deal with large endmills (1/2" max) so i should be ok. thanks for the info

 

[Jim F]

At work we use R8 collets for up to 3/4 EM's, bigger use Weldon holders.

 

[mmcmdl]

At work we use R8 collets for up to 3/4 EM's, bigger use Weldon holders.

Yep , up to 3/4s you should be fine . I cracked a few 7/8" collets when pushing them pretty hard in the past . ( I see you moved north a bit Jim ) . Love the drive thru those mountains !

 

[Jim F]

Yep , up to 3/4s you should be fine . I cracked a few 7/8" collets when pushing them pretty hard in the past . ( I see you moved north a bit Jim ) . Love the drive thru those mountains !

Yep, you can see my place from NB 15.