Annular cutter in milling chuck

PT Doc · Apr 9, 2019

Would like to be able to use annular cutters on a CAT40 milling machine. Would a milling chuck like this with a 3/4 collet hold the annular cutter well? They are quoting 425ft lb holding power for 1” milling chuck. Thanks in advance.

Techniks CAT, BT, HSK Standard Milling Chucks

Gordon Heaton · Apr 9, 2019

Should work fine. I use them a lot in an R-8 collet. If the cutter is in good shape and not huge, they go through most suitable materials with little effort.

LKeithR · Apr 10, 2019

Or you could just use a 3/4" end mill holder with a setscrew. You may have to shorten the holder a bit
because the setscrew flat on an annular cutter is closer to the end than on a regular endmill. Except for
that it will work fine...

Limy Sami · Apr 10, 2019

At 425 ft/lb ? ……………..if it doesn't mankind is in big trouble :eek:

FWIW I've used 40 mm annulars in ER32 on a 30Int taper - with no problem at all

PT Doc · Apr 10, 2019

That is a possibility but would need modification and screwing around with. Will try the Techniks milling chuck first and or Er40 collet chuck. Thanks you.

Marty Feldman · Apr 10, 2019

One set of annular cutters I have mount on a 3-flat shank, meaning a good hold in a 3-jaw scroll chuck.

-Marty-

michiganbuck · Apr 10, 2019

I used to sharpen annular cutters and think the shank is hard so an end mill holder would be better..or just something better that a collet. Agree with care and not crazy in-feed a collet would be OK.

They seem to cut like a center cutting end mill so not as difficult to turn that a two flute drill.

DMF_TomB · Apr 10, 2019

they sell annular cutter adapter holders made to hold spring and the point that ejects slugs. used in magnetic base drills and drill press.
.
that way you dont have to pry out slug. it suppose to eject slug automatically
.
annualr cutter adapter - Google Search

country_boy · Apr 10, 2019

DMF_TomB said:
they sell annular cutter adapter holders made to hold spring and the point that ejects slugs. used in magnetic base drills and drill press.
.
that way you dont have to pry out slug. it suppose to eject slug automatically
.
annualr cutter adapter - Google Search

I never had any issues ejecting slugs with gravity with my Milwaukee steel hawg annular cutters. They cut from the outside in, so when they break through, the slug has enough of a flange on it that it does not slide inside the cutters- seen this drilling 3” holes in 3/8” 1018, and 1-3/16 in 1” A36 ( in other words with slugs ranging from disc-like to cylinders.

In fact in gang drilling, you have pull the first slug out to drill through the second piece. Otherwise it makes a great thrust bearing.

Same behavior on both a mill and Milwaukee full side mag drill.

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DMF_TomB · Apr 10, 2019

country_boy said:
I never had any issues ejecting slugs with gravity with my Milwaukee steel hawg annular cutters. They cut from the outside in, so when they break through, the slug has enough of a flange on it that it does not slide inside the cutters- seen this drilling 3” holes in 3/8” 1018, and 1-3/16 in 1” A36 ( in other words with slugs ranging from disc-like to cylinders.

In fact in gang drilling, you have pull the first slug out to drill through the second piece. Otherwise it makes a great thrust bearing.

Same behavior on both a mill and Milwaukee full side mag drill.

Sent from my iPhone using Tapatalk

i have easily drilled many 1000's of holes with annular cutters even with ejector spring i have had many slugs not eject and need a little prying with a screw driver whether they were getting dull or hot hard to say
.
rough guess per 1000 holes maybe 20 slugs didnt auto eject and needed help. still annoying. without spring ejector i would say you would get much more slug sticking like easily 100x more. never would even consider not using the spring ejector seeing how its designed to be used with one

country_boy · Apr 10, 2019

DMF_TomB said:
i have easily drilled many 1000's of holes with annular cutters even with ejector spring i have had many slugs not eject and need a little prying with a screw driver whether they were getting dull or hot hard to say
.
rough guess per 1000 holes maybe 20 slugs didnt auto eject and needed help. still annoying. without spring ejector i would say you would get much more slug sticking like easily 100x more. never would even consider not using the spring ejector seeing how its designed to be used with one

I was specifically referring to the Milwaukee steel hawg- I’m sure other annular cutters don’t cut the same, and god knows a hole saw sure doesn’t. With the Milwaukee cutters ( I’m sure they are available under another brand) I’ve drilled probally 500-1000 holes- never removed a slug- never even though about what a PITA it would be either. Only used maybe 4 sizes, but after buying the first few retail, I was able to accumulate a set on eBay,

I saved about a 100 slugs left behind by the 1-3/16 cutter, and ended up smothing the flash like flange and let my son have them as blocks

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cyanidekid · Apr 10, 2019

What is s “milling chuck”? Also, funny no one calls it a Weldon shank?

atex57 · Apr 11, 2019

Isn't a milling chuck collet supposed to have a full length, full round shank tool inserted? I have been under the impression that the collet has to have full contact to keep it from deforming. A side lock, Weldon, holder seems OK. I use annular cutters in R8 collets all the time and have no problems.

Ed.

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