Chuck adapter plate for my smithy 1220

M

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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Nutfarmer said:
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.
Click to expand...
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.
 
Nutfarmer said:
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.
Click to expand...
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
 
markba633csi said:
An aluminum adapter would probably work just fine if it's 3/8" or more- and would be much easier to machine as well
Click to expand...
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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