Spider chuck
- Thread starter JonathanK
- Start date
colchester
Member
I used 7/16 x 20 tpi on mine Not sure it is the best choice but it works very well for me
F
frwillia
Guest
I used 3/8-24 Socket head cap screws, picked the length so they would always have their heads recessed into the spider body for safety:
I later added brass to the bolts.
Fitch
I later added brass to the bolts.
Fitch
T
tech-shooter
Guest
I also used 3/8-24, with recessed heads like Fitch: http://www.the-long-family.com/tooling.htm - click on the first picture...
Cheers,
Chris
http://www.the-long-family.com
Cheers,
Chris
http://www.the-long-family.com
JonathanK
New member
OK heres what I built...keep in mind Im not a machinist just a hobbyist gunsmith.
Heres my machine with the 4j chuck that cam with it
this is the faceplate that came with the machine(I never use it and pricing faceplates and backplates, I can get a faceplate later for quite a bit cheaper than a backplate alone) , I cut it down to make the spider. I ot a lesson in working working with cast steele...it sucks
I drilled and tapped it, I am using 3/8 16tpi for now. I may later open to 1/2 and go with 20tpi.
After drilling and tapping
Spider chuck with barrel dialed in, I havnt made brass inserts yet so Im using .025 brass sheet
22.5 barrel chucked up with plenty of room to spare
Heres my machine with the 4j chuck that cam with it
this is the faceplate that came with the machine(I never use it and pricing faceplates and backplates, I can get a faceplate later for quite a bit cheaper than a backplate alone) , I cut it down to make the spider. I ot a lesson in working working with cast steele...it sucks
I drilled and tapped it, I am using 3/8 16tpi for now. I may later open to 1/2 and go with 20tpi.
After drilling and tapping
Spider chuck with barrel dialed in, I havnt made brass inserts yet so Im using .025 brass sheet
22.5 barrel chucked up with plenty of room to spare
David Sengelaub
New member
My vote is to use a very fine pitch thread. With a fine thread it is easier to make small adjustments because it takes more movement of the wrench to move the barrel small amounts. Also fine threads have a shallow ramp angle which keeps them from backing off so you don't need lock nuts.
F
frwillia
Guest
lejarretnoir
JP Poulin
I used a Chinese D1-4 cast backplate that I machined the OD and face square, then machined a 1" thick stainless round to match the adapter perfectly. Everything was drilled and tapped on the Bridgeport with rotary table and 3/8x24 socket cap screws. I turned and added brass tips to the barrel screws.
To date I've not had one barrel slip from start to finish in my setup and everything stayed dialed in. There are no screws protruding on the chuck side in any operation.
To date I've not had one barrel slip from start to finish in my setup and everything stayed dialed in. There are no screws protruding on the chuck side in any operation.
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F
frwillia
Guest
I used a Chinese D1-4 cast backplate that I machined the OD and face square, then machined a 1" thick stainless round to match the adapter perfectly. Everything was drilled and tapped on the Bridgeport with rotary table and 3/8x24 socket cap screws. I turned and added brass tips to the barrel screws.
To date I've not had one barrel slip from start to finish in my setup and everything stayed dialed in. There are no screws protruding on the chuck side in any operation.
Beautiful job. Well done.
Fitch
JerrySharrett
Senile Member
Nice looking Heavy 10 from what I can see of it. How long have you owned it?
Before I made my spiders I looked at photos of the ones that had been made and listened to quite a few opinions of those that were using this setup. The result is I used 1/2" UNF screws for both of my spiders and made up a T handle for adjusting them, that way I cant over tighten them. The only screws I can't recess below the turning surface are the ones on the out board spider.......Kiwi
lejarretnoir
JP Poulin
It's a 13x40.
Found this one about 5yrs ago at a hospital maintenance shop sitting in a corner collecting dust. Excellent condition, well maintained and hardly used.
Tim Oltersdorf
Active member
I used 1/2" X 20 tpi set screws. One problem was finding the set screws. I used an internet company called McMaster-Carr who sell them individually and in 5 packs. The local hardware stores did not stock them. Tim
K
kiwi smith
Guest
Tim, Thank you for posting this info. I have been having the same problem lately trying to get socket head set-screws that are longer than 2" in 1/2-20 thread. I found a company in Australia that list them as a special order item, but at $7.62 each (minimum order 50 pack) I thought to hell with that.
I'll try the company you mentioned, just hope they will do export!
Cheers,
Dean.
Butch Lambert
Active member
Dean,
I have an account with them. If you have a problem I can get them and mail them to you. I just sent a tool steel forming cutter to Ian Owen.
Butch
I have an account with them. If you have a problem I can get them and mail them to you. I just sent a tool steel forming cutter to Ian Owen.
Butch
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K
kiwi smith
Guest
Hi Butch,
I might have to take you up on that offer thanks. I contacted them about export, and well, the email reply I got was fairly abrupt, bordering on downright rude. No, they aren't interested in export customers at all (abridged version). So much for customer service........ A shame because their website is awesome, lots of good stuff.
Thanks Butch, let me know your email address or PM me so I can discuss with you what I need. Nice that at least someone is willing to go out of their way to be helpfull. More than I can say for my experience with McMaster-Carr......
Cheers,
Dean.