Latest project, Spider chuck

L

liljoe

New member
I have been working on this the last couple days. I have picked up some great ideas from you guys on here. It seems to work pretty good. I really needed to do something since my lathe was real long through the headstock. In the stock form it was about 27 inches, now I can easily chamber a 20 inch barrel after a few minor modifications.

Joe Hynes
 
Nice job Joe. Are you shooting at Harrison this year or just going to post pictures on BR Central? Haven't seen ya since the SS.

Jeff Aberegg
 
Yes Jeff I am planning on shooting this year. I was up visiting with Larry the other day. I am really getting excited about shooting again. I need to start getting things around soon. Was hoping to get some bullets sometime soon but that seems to getting pushed back even more. Larry is trying to talk me into shooting the state score matches. Not sure if I have the junk to compete for that.
Later

Joe Hynes
 
Looks good. I like the smooth meat hook free OD.

Well done.

Fitch
 
You don't need a 30 Joe. I'm not traveling this year, only going to do the Michigan match as that's about all I can afford to do now. If you even need a place to stay at one of our matches let me know, have lots of room in the MH.

Jeff
 
My New Spider

I am not a machinist or gunsmith. I attempted making a spider. I bought a Grizzly D5 backplate, machined a piece of stainless, bolted to backplate, counter sunk holes for bolts, went to hardward store, purchased copper tips.

Took picture and here it is.

KG
 

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Looks good KG.

What were the copper tips called at the hardware, or did you make them out of something you purchased?

Fitch
 
Copper tips

I was browsing plumbing parts and saw these tips. They appear to be caps to solder on the end of copper pipe.

They had several sizes. I used 3/8 allen bolts and these caps slip over the end. Only cost .49 each.

Sorry I don't have an official name for them.
KG
 
Looks good guys, are the thread UNC or UNF?

I was thinking of building a spider with 5 bolts.

Ben
 
Those are 1/2" caps. Only problem is you are starting to get quite a bit of surface area that has to be overcome when you index in the muzzle end. While it will no doubt hold the work, it doesn't allow for the stress-free pivoting that a smaller brass rod inset into a bolt end would.
 
slugger said:
Those are 1/2" caps. Only problem is you are starting to get quite a bit of surface area that has to be overcome when you index in the muzzle end. While it will no doubt hold the work, it doesn't allow for the stress-free pivoting that a smaller brass rod inset into a bolt end would.
Click to expand...

True, but smaller copper pipe caps are available. It would just be a matter of turning a shoulder on the end of the bolt. If the pipe cap slips through the threaded hole, it could be glued to the end of the spider bolt with Locktite stud glue.

I think the copper pipe cap idea is worth trying. I'm going to try it anyway.

Fitch
 
slugger said:
It's not very "machinisty" though
Click to expand...

Well, that's true, sort of.

I'll think I'll still give the smaller copper pipe caps a try and see how they work. If I used solid copper, or brass, I'd drill a hole in the bolt, machine the copper to fit in it and have a flat surface of larger diameter than the hole in the bolt to contact the work. The copper pipe cap approach just puts the bolt inside the copper instead of the copper inside the bolt. Some machining required either way. :D

Worth a try anyway.

Fitch
 
frwillia said:
Well, that's true, sort of.

I'll think I'll still give the smaller copper pipe caps a try and see how they work. If I used solid copper, or brass, I'd drill a hole in the bolt, machine the copper to fit in it and have a flat surface of larger diameter than the hole in the bolt to contact the work. The copper pipe cap approach just puts the bolt inside the copper instead of the copper inside the bolt. Some machining required either way. :D

Worth a try anyway.

Fitch
Click to expand...
Do you have a technique for drilling holes in bolts? Carbide bits? Do you loctite the solid brass tips in?
 
nemo999 said:
Do you have a technique for drilling holes in bolts? Carbide bits? Do you loctite the solid brass tips in?
Click to expand...

My "chuck end" spider has 3/8-24 American made Socket Head Cap Screws. I held them in the lathe in a pc. of hex material that had been drilled and tapped to 3/8-24 and drilled them quite easily with a drill. I center drilled them first, of course. I then pressed in 1/4" diameter steel balls.
SHCS are tough but not that hard.
 
nemo999 said:
Do you have a technique for drilling holes in bolts? Carbide bits? Do you loctite the solid brass tips in?
Click to expand...
I used number 4 copper wire from Home Depot. It is used for grounding antannas and such. Center drill first then a regular #7 drill bit is perfect. I held the bolt in the lathe chuck with a threaded coupling to drill the end of the bolt.

Cut the wire to length, insert into bolt, and then give the end a whack with a hammer and the copper is swaged to the hole, no epoxy or loctite needed.
SpiderBolts.jpg
 
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