Having a brain freeze moment....what adapter do i need for a Jet 16x42 evs to run my nova chucks?
[OP]
Member
Having a brain freeze moment....what adapter do i need for a Jet 16x42 evs to run my nova chucks?
Contributor
1.25x8tpi - I assume that is what you are asking?
[OP]
Member
The chucks I have are all 1x8 and I thought the Jet spindle requires an adapter?
Contributor
Ken, do your chucks take an adapter? Some of the Novas (midi, some G3, etc.) are tapped only in 1"x8tpi. The others have a larger tapped opening that takes a variety of inserts to fit various spindles. The Jet spindle is 1.25" x 8 tpi.
There may be a way to go "up" in size, but I am unaware of it.
[OP]
Member
I looked at my G3 and there is an adapter in place, I dont recall putting it there so it must have been done when ordered or I plum forgot. So I geuss I have the tapped chuck.
Contributor
If your adapter is 1x8 tpi, then take it out and see if the threads in the chuck body itself is 1.25 x8 tpi.......my supernova chucks are larger with my adapters being 1.25 x 8tpi.........they make the SN and SN2 to have a 1.50 x 8 tpi and you can use various adapters
I am not sure about the G3 ......what size threads the actually put into the chuck body itself. Hope this helps!
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[OP]
Member
I would hate to order a new Jet and not be able to work it immediatley LOL!
Member
If you need to go back and forth with the existing chucks, you can get adapters form PSI, CSUSA, Packard and others. Some have holes for vacuum chucks, others don't. I bought one from PSI when I upgraded and use it regularly as my first two chucks (PSI) do not adapt. My G2s, and SN2 do, but I did not buy the smaller adapters for them. Some slight increase in run-out may occur with any spindle extender.
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Member
That's why I ordered mine when I ordered my lathe!Originally Posted by Ken Hill
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Contributor
The Nova G3 will take various adapters. I originally bought the G3 for use on a Jet mini, which took a 1" adapter. Now that I have moved to a Jet 1642, I have changed the adapter in the G3 to 1 1/4".
Contributor
A followup on what Bob posted on the G3 - there is also a G3-D that is made for the Delta lathe and it does not accept an insert. It comes only in 1" x 8 tpi. It is also the one that accepts a grub screw for reversing.
[OP]
Member
John, there is "D" stamped on what I would assume is the adapter of the chuck.
Contributor
Ken, not sure about that. I no longer own my G3-D, so I can't look at one to see what the appearance is. Can you remove the insert? If so, then you should be able to replace it with a 1.25" x 8. My advice is to only use Nova inserts.
[OP]
Member
Im gonna give that a try
[OP]
Member
Yep, it does come off.....
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