Chuck fitting?

[th62]

What kind of chuck fitting is this? slight taper on the backplate spindle and three threaded spigots.

 

[Martin W]

I don't know much about mounting chucks, but that looks like a cross between a D-1-3 cam lock and a tapered mount chuck. My guess is it's a taper mount with threaded fasteners to keep it on? The back plate on the chuck does not have a matching taper? Would be very hard to get it running true I would think, especially if you had to remove to install for a 4 jaw.
Someone with more knowledge will be around soon.
Martin

 

[th62]

The chuck has a tapered receiver, just doesn't show up,on the pic.

 

[Just for fun]

Probably just called bolt on type.

 

[stupoty]

I have this spindle nose on a 9x20 lathe I have , I think it's common to old denford cnc lathes , I only ever made one back plate to fit it , wasn't too difficult.

Stu

 

[matthewsx]

It's a DIN mounting.

DIN 55027 Lathe Spindle Mounts

I don't see very much about these spindles but I suspect they are more common in the US than most of us think. When I got my Bolton 13x40 I just thought the chuck was bolted on but after doing some research I discovered this international standard that was apparently created by Russians and used...

www.hobby-machinist.com

John

 

[verbotenwhisky]

What kind of chuck fitting is this? slight taper on the backplate spindle and three threaded spigots.

That looks like the mounts on a PM1022/1030 and I have seen those on other brands as well, the spindle is to small to use a D1-4 so they use studs and nuts instead, the taper is common on these

 

[machPete99]

Its probably an "A" series taper, which is similar to "D" camlocks but using bolts instead of camlocks. See:

Lathe Spindle Nose Mounting Identification Chart

Lathe Spindle Nose Mounting Identification Chart

www.smalltools.com