thru coolant

[SIG]

What holders and collets or disks do you prefer when drilling with thru coolant?

[big_mak]

I dig ER collets with the rubber seals, then you don't have to fart around with the disks!

that's my $.02

[dertsap]

DA and ER are my preferance for smaller sized drills , though with DA collets i do find there is more farting around with them to get the drill dialed up dead nuts, sidelock for all else

[big_mak]

Side lock is condemned in my shop!!!!!

[dertsap]

Originally Posted by big_mak Side lock is condemned in my shop!!!!!

why"s that ?

[big_mak]

side lock = run out
run out = premature wear

[dertsap]

when i say larger drills i am refering to a heavy sized drill ,generally 1" shank plus , i find if it's a decent holder then the drill will dial up fairly well , on many of the jobs we have we are plowing thru steel plate and these tool move fast , if we try runnig the larger drills in anything other than a sidelock then the drill will spin in the holder and break .

i do agree about premature wear with runout , ive seen many burned drills after only a small number of holes because someone was in to much of a hurry to clock it

[big_mak]

I've used standard ER collets and thru coolant for milling deep slots and Parts the need to be pretty.

For them big drills, yah you need side lock or your in big poop. That simply can't be avoided.

I've used thru coolant lots. I regret not getting it on the machine I bought for myself. Hind sight we all know.... 20/20.

At the same time with a 10K spindle I'm now wishing I got a mist collector. With 10K and thru coolant a mist collector is a must have.

The answer for collets is still ER series for me. Unless you can spring for shrink fit, or hydraulic, or the BIG Mega Chucks!!!!!!

I just sprang for some ultra precision ER chucks from techleader. Dropped in a half inch endmill and clocked it in the spindle 0.0002" run out, measuring on the cutting edges. Who do I blame for this? the endmill or the holder. JK

Finish was amazing in 7050 Ally!!!!

[dertsap]

Originally Posted by big_mak . Dropped in a half inch endmill and clocked it in the spindle 0.0002" run out, measuring on the cutting edges. Finish was amazing in 7050 Ally!!!!

hard to beat er holders , tg are good as well ,they hold pretty solid , i'm not sure if they make them with the rubber in the collets for thru spindle , ive just used them (tg)with thru spindle on endmills for chip evacuation ,lots of coolant pours thru the slits of the collet

Originally Posted by big_mak At the same time with a 10K spindle I'm now wishing I got a mist collector. With 10K and thru coolant a mist collector is a must have. !!!!

coolant mist tastes great when a guy has to be popping his head in the machine every so often , doesn t it ?

[big_mak]

Doesn't help with getting any action when you get home wreaking of Valcool, Blaser, Oemetra or what ever you use!!!!!

[SIG]

Thank you for the responses.

[fmari]

Here is the most common collet chuck that I sell. CAT40-ER32. You can't beat my price and quality. Concentricity between the outside taper and the inside taper is .0001 or less. Balanced to G2.5-20,000 rpms. The nice thing about ER collet chucks is that you don't need to carry too much inventory. I make and sell floating tapping heads that take ER collet and straight shank ER collet chucks. I use these almost all the time in my machine shop. I use it for 3/4 carbide endmills with no issues. My collet nuts are solid and not the bearing type. Bearing style collet nuts sound nice on paper but in reality they crack too easy and they get contaminated with coolant and chips. I sell separately ER collet nuts and I sell them all the time to people replacing their bearing style collet nuts. So far I have 2000 of these in the US. Not a single complaint.