Jump to content
Sign in to follow this  
Todd M

Diamond Plate Spindle

Recommended Posts

I have the 8 inch diamond tool polishing plates with the 1/2 inch hole in the middle for a spindle.  They are roughly 3/8 of an inch thick.

These spinning plates to shape the carbide gravers on a drill press.  

Does someone make a precision pre-made spindle which chucks up in a drill press for these plates?

I am prepared to machine a few for myself if no product exists.  But, I don't have a strong desire to re-invent the wheel if there is a great product which exists. 

Currently, I am using 1/2 inch bolts as my spindles, which have had the head cut off them, but the threads are not perfectly concentric with the shaft.  This induces a small amount of "wobble" in the plate as it spins.  I realize some of it may be bearing run-out on the drill press, but that is not the majority of the wobble. 

Two pictures.  One is of what I currently use.  The second is a drawing of what I *could* machine to replace it. 

 

 

 

bolt engraving spindle.jpg

improved spindle design.jpg

Share this post


Link to post
Share on other sites

I ended up starting a batch of 4 spindles on the lathe.   The spindle will accept plates as thin as 3/16ths of an inch, and as thick as 1/2 inch.

There was a spindle which was available on another site, but it did not look robust.  All surfaces are true relative to each other within 1/1000 of an inch.

The spacer which rests on the abrasive side is a friction fit on the shaft, to enhance trueness.  

Below is a comparison picture between the old and the new style.   I wanted a longer shaft on this spindle, so the quill on the drill press didn't have to be cranked down so far.

 

Spindle 1 of 4 with old style.jpg

Share this post


Link to post
Share on other sites

Todd, I am glad that you are resourceful and can make the tools to suit your needs!  Thank you for posting your question and answers.

Janel

Share this post


Link to post
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.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  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.

Loading...
Sign in to follow this  

×
×
  • Create New...