11 Attachment(s)
Backend lathe spindle chuck
lately I have been turning a few longer cylinders that reach all the way though my lathe spindle. I have been making do by clamping a bearing to an arbor press but that is really limiting and not particularly convenient or the best way to support these cylinders. also no guarantee of being concentric with the chuck either. I decided during this little cold snap that it might be a good time to come up with a way to mount a chuick on the back end of my spindle turning the lathe into a double chuck lathe of sorts, but why stop there since I sometimes have to use a 4 jaw on square stock Si I made the adapter to accept both a 3 jaw and a 4 jaw chuck.
Attachment 41744
Attachment 41745
press fit
Attachment 41746
Attachment 41747
Attachment 41748
tap fit
Attachment 41749
tap fit for the modified 4 jaw
Attachment 41750
What better way is there to locate holes 120° apart around the adapter
that to clamp on a jaw and support the end with a machinist jack
Attachment 41751
Attachment 41752
Had to die grind with a small bur to gain clearance
Attachment 41753
Attachment 41754
One reason I hardly ever do videos is for one I don't care for them 2 I find them a royal pain to do. but if I do upload a video they are usually short. This shows the runout of the adapter which is near zero the only movement I found in the indicator while running the lathe at full speed was when it passed a nick in the adapter that was caused when I was spot milling for the chuck mounting bolts.
https://youtu.be/vHZJlRjmfvI
