Bump straight knurling tool

[Cascao]

After making a scissor knurling tool, I become intersted in making a straight knurling tool since it:

> is greath when you need transmit torque between a steel shaft and a plastic wheel.;
> it can bring me more choices when making stuff;
> I can "save" a interference mount part infortunatelly made too loose.


I took a 1/2" square and milled the wheel slot


Turned the 1/4" pin from a 1045 bar. Here you can see there a section slighty bigger for interference fit


Pin was heated red hot and quenched in water.


After welding the side tab and cross drilling the 1/4" hole, I pressed the pin


Test run. I've made a fine (0,8mm) and a coarse (1,25mm) wheel.


My knurl set


now waiting rain give a break for paint the tool...