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I know I say mill But I plan on using a 4?" Angle grinder and 16g stone and just grind the top where set screw hit. . In will take about 5 minutes it will be done. It is faster than setting up mill

Strangely enough that's how I got my Armstrong knurling tool to fiit in my square turret! Bill

I did it once with a belt sander. Mike Taglieri

My attempt to mll down an Armstrong tool holder ended in blunting the inserts in a carbide face mill! Be forewarned. Bill in Boulder wrote:

I have two Armstrong tool holders I plan to mill down.? One use for the follower rest and triple knurling tool. My last lathe I also a American tool holder and did need to mill. Dave

Dear Dave, Thank you for the images & information. Very interesting. (Every day is a day a school). David UK.

Looks great, Dave!

Here photos of the exstension in use. Nice have the longer feed cross slide = =========== .

Note the bottom mill off to fit holder. Not my holder Dave

Here a few photos

The Armstrong tool holders are 3/4" to 7/8" for small lathes you can mill down to fit a Aloris AXA 1/2" tool bit holder. Now you can adjust the Armstrong tool holders and not need the American tool

Aloris use to make a holder for threading back 1970's. But most use carbide today or just sharpen HSS tool bits. Dave

An excellent tool, I have had and used one since 1967. You might want to make a QC fixture to support the cutting tool in your QC toolpost. You can make your own form tools to work the same way!

"The Armstrong threading tool where it's kept sharp by honing the top as the tool wears." I recently got one of these threading tools also (though I think mine is Williams brand rather than

It will work for new manager too. Like airport in Reno I spent all time airport.? The airport has lot of my doors. Dave

What are the odds of a Harbor Freight? still having the same manager from one week to the next ? They may even have book on that in Vegas . We have 2 HF's in Reno one go's through managers just like

Cheaper is not best Need the $20.00 for quality as I found out the hard way aka return. Harbor Freight is easy you see manager in your leathers and he quickly fix the problem Dave

Thank you all . It looks look the bearing are ABEC 1 OR lower. I have size in? NSK and maybe SKF ll in ABEC-3 or better I will save the best when needing to replace. Dave > > >

Here a few charts on ABEC 3 and ABEC 9 The ABEC 3 is motor grade ball bearing. The ABEC 9 is mainly use in machine tools. https://www.engineersedge.com/bearing/ball_bearings_tolerances.htm

Here price for a abec-7 7206 https://www.mcmaster.com/product/4487N26 All bears I purchased for doors was ABEC-3. It was for a press fit and low quality could give problems in installing the