Just bought one of these off Ebay.

http://cgi.ebay.co.uk/ws/eBayISAPI.d...tem=3831144764

Anyone have any experiance of these?
They work by cutting the knurl as opposed to squashing the pattern on.
I did a web search and found some info on the Dorian one.
They also do a straight knurl that carries one diagonal wheel at the same helix angle so it cuts straight.

http://www.doriantool.com/Knurling/knrl_b7.pdf

After I've had a play with this toy I might attempt to do a straight one.

I often need long straight knurls for the motor shafts to be pressed into the rotors.


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John S.
Nottingham, England