got my 3/8 round bar today, now i can at least finish the block pinning
A few questions on your pinning.got my 3/8 round bar today, now i can at least finish the block pinning
Thanks, good call on the template too. It seems anyone that has ever had problems with pinning uses brass or steel pins, aluminum should help alleviate the problem with potential thermal expansion ratio differences.Honestly it was a very generic process. I originally planned on using a 3/8 and 5/16 drill and buying 10mm and 8mm rod then machining rod to fit snug in hole. WELL i found some 5/16 rod at work and it fit perfectly snug in the 5/16 drill hole. So did the 3/8 rod. Rods are 6061 Aluminum. I found the 5/16 rod and bought 4 sticks of 3/8 on ebay for $8 out of Colorado (6061dude), good stuff.
I basically just put tape on the drill bit so i drilled each hole about the same depth, approx 3/4", then with a hack saw i cut the pins about 5/8. Not really a machine shop process here. Ideally the pins could be started but not pushed the hole way with your thumb, I light tap with an small rod and hammer got them finished, not too tight to move or effect the bore. A couple of the pins were too loose for my liking, an easy fix was to lay pin down and whack it with a hammer making it slightly oval shaped, then they fit nice and snug.
The hardest part was cutting and cleaning the little pins without burning yourself. Drilling is the most critical step and would be near impossible with that steel template to keep the bit from jumping around. The template can be made out of bar with just one hole as long as it has the same size hole your drilling and can be firmly clamped in place where you want the pin.