4 speed ka-booom !

ChargerST said

How far do you taper them back? Do you have a picture of a modified hub?
Just to be sure are you talking about the sides of the "teeth" or the front and rear flat area or the top (the arrows point at the corner so I'm not 100% sure)?

what do you use for tapering and how do you get them hardened (nitrating, cryo-treatment, heating/cooling)?

Click to expand...

I'm talking about the front rand rear edges of the slider, sorry for the arrow placement, kind of in a hurry when I did it. I taper the back about 30 degrees, but only from the middle of the edge up to the top of the edge, not a whole bunch, but just enough to make a smooth transition. I don't have any pic's of one done at the moment, I have the guy that does my axles harden them for me, I'm not 100% sure which method he uses.