View Full Version : Plans for a machined bending jig?
11-17-2005, 11:45 AM
I looked everywhere I could think to look on this site and didn't see any plans for a machined jig for bending a receiver flat. I did see one for a jig that looks like it needs to be welded together from plate, though. But I'm not much of a welder. And I do have someone that can machine me a bending jig from solid steel bar stock.
Does anyone have a drawing of how to make one? I suppose I could "invent" one that works just like the welded one, but of course it would be easier if there were plans already out there.
If it's posted somewhere and I missed it, I apologize. Point a new guy in the right direction! :)
11-17-2005, 10:07 PM
I machined my center "punch" section out of steel, the design was pretty simple. The inside of the receiver is 1.25" wide so you just make your steel that wide. The front is 1.17" tall and the rear is 1.62. About a 3 degree taper, more or less. 10.18" long. Once the steel is cut to that shape, you mill in slots to allow the dimples to clear the form and slide off once done. The bottom has a flat plate that bolts to it to clamp the flat in place, two bolts thru the magwell and one each in the trigger and grip holes. There are two holes on the flat centerline you can use to locate it with pins. I have a PDF of a similar unit by "JAS" I could email you. It's like mine minus the locater pins.
The outer die was welded up from flat stock although angle iron would work too and be stiffer.
Pics of my completed jig are here: http://www.akfiles.com/forums/showthread.php?t=3548
11-18-2005, 03:09 PM
Yours looks pretty good. I'd love to see the .pdf file you mentioned. Can you email it to me at tobin_patrick at hotmail.com ?
I'm embarrassed to admit I'm not real clear on how the jig works. Once you bolt the flat in place, how do you achieve the bends? It looks like you have an outer piece that goes around it.
Once you have all the bends done, you just tap the jig out the end of the receiver, correct?
11-22-2005, 01:18 PM
Check out the new tutorial Sang just did, it shows the jig in action.
11-22-2005, 06:50 PM
'52 -- I should also mention that a top notch finger brake will do it.
Although there have been 10's of thousands successfully bent with a smusher, the brake doesn't stress the whole receiver.
11-23-2005, 11:01 AM
After more discussion with the person who would be machining the jig I was wanting to make, I think we've decided that it's probably better to just go with a commercially made one. So I'll just bite the bullet and invest in a new one that I know is made properly.
11-24-2005, 12:53 AM
1952sniper, I emailed you the PDF for future reference. Hope this helps.