Hi Otley,

Tracy Tools seems to stock screwed shank end mills. I have a few cutters from them and I have had no problems so far. Screwed shank cutters are very hard to find where I live, so yes, I use ER collets both to hold cutters and to hold work.

Thor

Greetings,

Why not resharpen them?

several excellent methods described over the years, plus when they are really sharp, they cut beautifully.

Regards

Brian

Im busy looking for screw shank mills to fit a Clarkson older` type c `chuck that came with my mill.

I have a question, does the screw size of the cutter = the shank size.

For instance i have 1/4",3/8", 1/2" and 5/8" collets which are unmarked. Would a 15/32 " screwed shank cutter fit in the 1/2" collet (i.e screw in?) or do you need a 15/32" collet?

Edited By mark smith 20 on 01/11/2016 12:21:01

Hi Michael so a 15/32" shank cutter should fit in the 1/2" clarkson `c type collet?

The collets are the type with two prongs at the back. Ive never came across this type of clarkson before .

I have 3 original collets, the long ones in the photo,which came with the mill in 1/4",1/2" and 5/8" sizes , i assume these take either screwed or plain shank cutters but they have to be the correct exact size??

Edited By mark smith 20 on 01/11/2016 12:47:07

Hi Otley & Guys
To use plain cutters in an Autolock Slice the end of a old cutter and make what we called a dummy centre
Please see photo> Screw into collect fit in holder a tighten up Try it
Nobby

The three long collets are nothing to do with the clarkson system but as you say they will take the screwed shank type of cutter as long as it is a fit for the collet. The screwed shank will be of no benefit but will not be a problem as long as the collet has a good length of plain shank to grip.

Mike

Silly enough, same for metric.

6mm x 20tpi
10mm x 20tpi

Etc
Nice things about standards, there are so many of them.