Knurling tool build

That would work if I could grind grooves into the axle. I may have a better idea. Drill the hole only partly through one arm. Then use a washer or plate to hold the axle in. That also leave nothing sticking out to interfere with the chuck.
Robert
 
Have a slip fit pin with each side having a flat and set screw them thru the arms . Plenty of ways to do this . If it were me , I would use a grade 8 bolt and loc-tite the threads on one side , or use a shoulder bolt .
 
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I second shoulder bolts if possible. This application is one of the reasons they exist as far as I know. You can tighten down a nut on a shoulder bolt without pinching the two arms together on the wheel and the ground surface of the shoulder should make a good bearing surface.
 
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Of course that hinges on finding shoulder bolts with the exact dimensions you need, since your parts are made already...

Awesome work by the way! I've been thinking about buying a pinch type knurler for a while but never considered making my own!
 
I haven't read every post but has anyone mentioned just using a pin?

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Or was excessive wear an issue there?
 
Weldo said:
I haven't read every post but has anyone mentioned just using a pin?

View attachment 317517

Or was excessive wear an issue there?
Click to expand...
Lots of great ideas. I like the grade 8 shoulder bolt idea if the arms stay far enough apart.
Those pins would have wear issues. Arm spacing issues.
Robert
 
Here's where we are:

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This version is with the hollow axles (hardened O1) and wimpy #8 screws. We will see how that holds up to testing. It feels very solid otherwise.
Robert
 
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