Looking for tips on scissors knurling.

[darkzero]

Lol, yep I know. I don't have pics of the actual ignition, was too busy panicking!

Only pics I have from that time poo almost came out.

 

[pontiac428]

I'm glad you didn't get a flash fire with any cutting oil in the chip tray. Ferrocerium is sintered, extruded, and fused into form. You are brave to machine it. The eyebrows eventually grow back, I'm just happy you're still with us!

 

[David2011]

Most of my knurling is in brass, making replicas of parts on the deck guns of the USS Texas. I'm still hit-and-miss on measuring/cutting the OD to get the exact desired finished size but making knurled knobs, +/- .10 is close enough for this application. I use a scissor knurl from Little Machine Shop now after suffering through pressure knurls for years. It has 3 sets of knurling wheels, very helpful in matching or getting close to the original part's pitch. I do have an old American made pressure knurl with a pivot head that's pretty good as pressure knurls go but the scissor knurl is so much nicer to use. I just increase the pressure until a good pattern develops. The LMS scissor knurl has a fairly small screw and a big adjusting wheel so I increase the pressure only as much as I can turn the wheel by hand. It takes a few adjustments to get enough depth to develop a good pattern.

At times I have cut the tips of the diamonds off to give flat tops. That looks nice.