Spider!!!

I probably got a little carried away with the counterbore but wanted to make sure I had clearance for the (blind) threading and just bored the whole backside to above major diameter of the spindle threads.

As for threads, I've heard several 'rules of thumb'...one being 3-5 full threads of engagement, which I have (barely).

BUT, I'm not opposed to drilling out and rethreading with 5/16 or 3/8 fine thread. A 10 pack of set screws is under $10. Tradeoffs...

I understand this is a light duty machine, and barrel threading and keeping long stock under control is the goal. Both are inherently low RPM applications. I might even someday try chambering a rifle...but that is years down the road at best.
 
You'll get there.... I just acquired a SB Heavy 10 late last year. Did a tear down, repair/replace worn parts, paint, etc. I just recently threaded two barrels. This is a spider I put together for barrels too short to reach thru the spindle to the other spider.barrel spider.jpg
 
Kevin,
Really like your spindle nose spider. Very clever!
I've been using an outboard spider chuck on my heavy 10's for barrel work
for the last 15 years or so.
Great idea. does it screw on the spindle or is it mounted to the faceplate?

My spiders all use 1/2-20 screws with brass tips.

Thanks,

Phil
 
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