Jump to content

Recommended Posts

I posted my question here, but it may not have gotten bumped, so I will post again here.

I have a couple of faceplates for use on lathes.  Neither have the index pin.  I recently bought 4.5mm rod stock to make an index pin.  They fit perfectly except for the fact that both my faceplates have a key in the collet, so any pin must have a notch cut to fit into the key.

Why?  Seems to me the index pin does not need a fixed orientation.  But both of my faceplates require a keyway.  Just like the spindles in WW lathes, the key appears to be a soft material and can be easily knocked out.


Link to comment
Share on other sites

The index pin rides in a bore, and that bore may not be perfectly true to the rotation of the lathe spindle. It's quite hard to make a small bore like that in (what should be) hard steel perfectly. But if the pin is rectified in the bore, in the lathe, it's now true- as long as it doesn't turn in the bore. Thus the indexing pin and slot.


When we used faceplates at school, we got the part close with the pin, then bang-on with a wobble stick. Nowadays, I use optics to center in the faceplate.

  • Like 1
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...