Whats It Fit ?

[intrepid]

Just returned to my old home for some final cleaning out and came across this old drive plate. It came with a bunch I stuff I bought a few years back and fit nothing I had.
It appears to be a lathe drive plate but I have no idea what it fits. Similar to a D1-4 but larger pins. The plate is about 6 3/8" diameter 15/16" thick. It has three locking pins which are 3/4" diameter. Without my measuring
tools and only a ruler the best guess is the 3 mounting pins are on a 4 1/4" diameter. There are two screw-in drive pins which are 5/8" x 2 1/8" long. I'm hoping to sell it to someone who could make use of it before it goes for scrap. Any ideas? thanks

 

[Bob Korves]

Maybe a D1-5:
http://www.victornet.com/reference/Lathe_Chuck.html

 

[intrepid]

From what I have read the D1-5 has 6 locking pins, correct?

 

[4GSR]

From what I have read the D1-5 has 6 locking pins, correct?

I've seen both 3 and 6 pin back plates in my past for D-1 6" and D-1 8". That being a driving plate, you can get by with only 3 pins.

 

[mmcmdl]

From what I have read the D1-5 has 6 locking pins, correct?

3 or 6 pins . .781 diameter = D1-5 .

 

[intrepid]

3 or 6 pins . .781 diameter = D1-5 .

Okay, thanks. That settles it it must be D1-5