[widgitmaster]

I have been doing a lot of repetitive tasks on my new lathe, so I decided its time to make a nice solid stop to go inside the spindle bore!

[widgitmaster]

So I grabbed a piece of 2" diameter 1018 steel and turned it to fit the inside diameter of my spindle, around 1" long. Bored a .750 through hole for the stop-shaft.
Then I faced the other end to make a flange 1/2" thick.

[widgitmaster]

Next I drilled a cross hole around 3/8" diameter through both walls of the small diameter.

Then I put a pin through it and leveled it in my vise, so that I could run a metal slitting saw through the flange and into the cross hole.

This will allow the hub to flex, and not break from repetitive use!

[widgitmaster]

This whole project was not without incident, as you can see from the images it cost me a 7/8 5C collet!

The arbor grabbed and spun in the collet, and cracked the side out of it!

The saw is 6" diameter, 1/8" thick running at 70-RPM

[widgitmaster]

All though the collet cracked, I did manage to finish the cut in the hub!

Then I drilled and tapped a 1/4-20 hole through one wall of the large diameter, this is for a set screw to clamp on the stop-shaft, and expand the hub inside the spindle bore!

This way I kill two birds with one stone!


I put it in my spindle, and ran it at 2000 RPM, it did not cause any vibrations which is good news!

Now I can make small ACME leadscrews all the same length with out having to do extra setups for each one!

My 14x40 lathe has a 1.6" ID in the spindle, so I used a 3/4" shaft to make it solid! Then I turned one end of the shaft and pressed a block on to it, and turned it to slip freely inside the spindle bore. This gives me one complete flat surface to stop my parts from, wether I use a 3 jaw, 4-jaw chuck or a 5C collet chuck!

Hope this gives you some ideas of how easy it is to make a spindle stop!
Eric

[widgitmaster]

Now its off to eBay, to bid on a replacement 7/8 R8 collet!

[JFettig]

looks good, I ended up just turning a peice with a light press into the end of my spindle and use a peice of threaded rod with a jam nut, worked pretty good for the parts I was making, I made about 60 standoff posts that all came out within .001 or less.

yours looks a bit better than mine, definately better concept

Jon

[ZipSnipe]

Widgit you are the man. You are always coming up with somethin' kool that we can all use and enjoy, my hat goes off to you , ALL BOW to the Widgit Master !!!!

[madonno]

I made these for our small CNC lathes.
Attachment 330686
The drawbar (tube) doesn't allow for a spindle stop that's fixed in the spindle (moves back and forth so there's no accuracy). These are attached to the chuck.
For the bigger machines, I made an adapter plate to be used with these small stops
Attachment 330688

We are about to design new ones for the larger lathes now. Same idea but different design.