[takewhatyoulike]

A thing I like about TTS tools is the ease at which TTS tools can be modified. I needed small extra clearance when cutting a 1/16" keyway slot with a 1/16" endmill held in a TTS ER20 holder. The solution was to chuck the ER20 holder in a 3/4" 5C collet in my lathe and turn some of the diameter from the ER20 nut.

Don Clement

[WOTDesigns]

I've done that by accident with fixture bolts by forgetting required tool stick out, but your lathe technique has a much better finish

[takewhatyoulike]

I could have done the same by mounting a carbide insert lathe tool in a vise using the TTS tool in place on the Tormach. The 3/4" straight shank does make it easy to chuck in a lathe though particularly a 3/4" 5C collet.

Don Clement

[WOTDesigns]

Yep. One of many reasons I am looking forward to a lathe with 5C. I know I old modify some to work but I have a 12x37 which is a very oddball lathe. Meah. I'll just wait till Tormach releases their large which will have a 5C option.

[takewhatyoulike]

I use 5C not only on my lathe but on fixtures for the Tormach. See picture at the start of this thread. A 5/8" 5C collet in a Eagle Rock fixture with collet stop makes for quick work of milling a 1/16" keyway slot and parts are quickly changed. BTW I also use my TTS holders in my lathe e.g. here is a TTS drill chuck held in a 5C bar on my KDK QCTP on my lathe

[WOTDesigns]

I had noticed what looks like mill marks on your 5C block in the vise and was curious if you had to mill it square. I haven't had a need yet but love the option for set ups.

[takewhatyoulike]

I had noticed what looks like mill marks on your 5C block in the vise and was curious if you had to mill it square. I haven't had a need yet but love the option for set ups.

Yes I had to mill two sides of the Eagle Rock 5C fixture http://www.penntoolco.com/catalog/pr...ategoryID=5602 square as those two sides were left rough casting. I use those two sides in the application shown. The kurt D688 vise works great with the Eagle Rock 5C fixture.

I not only use the Eagle Rock 5C fixture in the position shown but also in the vertical position. Shown below are the Turcite parts I make using the 5C fixture.

Don Clement

[BAMCNC.COM]

I've done that by accident with fixture bolts by forgetting required tool stick out, but your lathe technique has a much better finish

Ditto, I hate when that happens