[Opper77]

sorry to butt in Bowtie....I know this is your thread...forgive me...

Also, most good shops will have a couple different tools to give you different sizes and patterns. We have 2 different sizes of diamond krurl, and a couple sizes of straight krurl (looks like just a bunch of longitudinal grooves when done)

The key to using one of these >X<, is set your carriage feed to one of the higher seetings (the larger the feed, the coarser the diamond pattern) and set your chuck speed fairly low (I remember 20sfpm for some reason; 90 - 100 sfpm is a usual turning speed for steel..)

A good pattern will take a few passes but the key for beginners is not to disengage the feed lever (like cutting a metric thread on a imperial lathe) ...just keep the tool in contact and stop the lathe where you want to stop the krurl.. reverse the feed direction (if this is not an option, reverse the chuck rotation), crank the tool into the workpiece a little more, and run back the other way

when you get good at it, you can just keep it running continuously and pick it up every pass, but you need to be careful or you can ruin a good krurl easily...

here's a few things I have made...