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*update* (if anybody cares)
some trial and error, a few beers, some late nights, a sad girlfriend and finally....some success. made some tweeks to the jig, with the help of a bent flat from a build party to make some fine tune adjustments.....oh, and caved in and bought a press. makes life so much easier.
the premise is the same. angle iron to make the bending portion of the jig, and 2 pieces of bar stock to sandwich the flat. used a friend's mill to make some grooves on the top portion to slide in around the mag well bumps and drilled 2 sets of locator holes in the mag well. the forward most set is for ak47 flats and the rear set is for ak74 flats. with another hole where the rear trigger guard rivet goes. just set the flat on the bottom piece, throw in the drill bits and line it up, slide on the top bar over the drill bits, clamp down on the ends with bolts, lube 'er up and press it in.
can you tell which flat was done with a purchased jig and which was done with mine?
so, I don't have access to a press and am trying to do this as much DIY as possible. I built a jig, kind of a cross between the 'grasshopper' jig and something that you would use in a press, but the idea was to use the bolt pull through method.
was testing it this morning and sheared off a bolt on one end. it appeared to be going in ok, a little resistance, but one side as you can see in the pictures was going down farther then the other, which is when the bolt sheared off.
I lubed it with moly grease. was alternating which bolts I was tightening.
My first thought is the obvious, the bolt was not strong enough. I was having trouble finding a real good strong bolt long enough. the heavy duty bolts weren't all thread, so they wouldn't have given me enough tightening distance. its a 5/16 about 3" long. any suggestions where to find one?
did I not use enough lube?
any ideas....thanks.
some trial and error, a few beers, some late nights, a sad girlfriend and finally....some success. made some tweeks to the jig, with the help of a bent flat from a build party to make some fine tune adjustments.....oh, and caved in and bought a press. makes life so much easier.
the premise is the same. angle iron to make the bending portion of the jig, and 2 pieces of bar stock to sandwich the flat. used a friend's mill to make some grooves on the top portion to slide in around the mag well bumps and drilled 2 sets of locator holes in the mag well. the forward most set is for ak47 flats and the rear set is for ak74 flats. with another hole where the rear trigger guard rivet goes. just set the flat on the bottom piece, throw in the drill bits and line it up, slide on the top bar over the drill bits, clamp down on the ends with bolts, lube 'er up and press it in.
can you tell which flat was done with a purchased jig and which was done with mine?
so, I don't have access to a press and am trying to do this as much DIY as possible. I built a jig, kind of a cross between the 'grasshopper' jig and something that you would use in a press, but the idea was to use the bolt pull through method.
was testing it this morning and sheared off a bolt on one end. it appeared to be going in ok, a little resistance, but one side as you can see in the pictures was going down farther then the other, which is when the bolt sheared off.
I lubed it with moly grease. was alternating which bolts I was tightening.
My first thought is the obvious, the bolt was not strong enough. I was having trouble finding a real good strong bolt long enough. the heavy duty bolts weren't all thread, so they wouldn't have given me enough tightening distance. its a 5/16 about 3" long. any suggestions where to find one?
did I not use enough lube?
any ideas....thanks.
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