Chuck adapter plate for my smithy 1220

mac1911

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6F7E9511-81B0-49F2-BC36-C1656848AF11.jpegI am new to machine work. Took the plunge by the way of grabbing a smithy at a very low price.

I have also acquired some tooling, measuring devices and many other odds and ends. One of which is. Bison 5” 4 jaw ind. chuck.
So after a few small projects im going to dive in and attempt to make a plate to adapt this unit.
Its a tad small for the smithy. So I need to make a plate that bolts to the smithy spindle ( 3 hole) and then the bison mounts with 4 bolts from the front.
Posting pictures on this forum is painful so there wont be to many all to soon
 
My attempts to sell locally and just buy the correct 4 jaw from smithy have failed.
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Bison is a good chuck. It is a better chuck than anything you will buy from Smithy. What is the spindle on a Smithy lathe? Most of the common spindle sizes you can buy a semi finished backing plate and turn it to fit the chuck.
 
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Bison is a good chuck. It is a better chuck than anything you will buy from Smithy. What is the spindle on a Smithy lathe? Most of the common spindle sizes you can buy a semi finished backing plate and turn it to fit the chuck.
Its a fixed spindle , 3 hole bolt on
I have had zero luck finding anything that fits other than from smithy.
 

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I haven’t seen anything like that before. Looks like turn a round plate to fit the spindle flange and then turn the plate in place to fit the chuck. I would mark the spindle and the chuck some how so you can always mount the chuck in the same place each time.
 
I haven’t seen anything like that before. Looks like turn a round plate to fit the spindle flange and then turn the plate in place to fit the chuck. I would mark the spindle and the chuck some how so you can always mount the chuck in the same place each time.
Will do. One of the first things I did was idex the 3 jaw. There is position that has less run out marked it with a punch.
At some point I am going to make a prototype out if aluminum because I have a piece.
Im still looking for piece of steel stock with out spending a small fortune. I will get there.
 
Also have one of these but anyrhing that fits is more money I dont have.
IDK whats going on, wont post pictures….
 
An aluminum adapter would probably work just fine if it's 3/8" or more- and would be much easier to machine as well
 
An aluminum adapter would probably work just fine if it's 3/8" or more- and would be much easier to machine as well
Its what I have on hand , finding any decent “scrap” is getting hard around here.
Only real local steel supply is only open week days till 4 and not exactly walk in service.
 
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