HOW TO BUILD A JIG

[MaXXXwell]

If any one has any questions shoot me an email...

Hey MonsterMetal,
How do you fix the three 'sliding' fixtures? Ar they clamped to the two horizontal bars?

[MonsterMetal]

Yeah... The horizontal bars are actually uni-strut track ... you loosen the bolts and the whole plate slides in the track. I think If I was to do it over I would try and figure out something that was a bit more precision. Ive been building a few road bikes and it takes a long time to set up really well because there is some slack in the uni-strut...

[N8NBOX]

anyway you could lable with the lenght measurements and height measurements...my scrap metal place can do basic cuts for free so would like to get them to cut the main ones for me.

[tikiharl]

I needed to come up with a basic inexpensive jig to make my next Burrito build a little more precise than "hows that look?" and ''hold this while I tack it". I had always thought the unistrut idea would be a good way to go,mostly because of the adjustments that could be made. On this I used 6" conduit spacers ,8" bolts and 3 sticks of unistrut. I even have a small crossbar that in theory could hold the BB in place,the BB should be craddeld in the open area of the unistrut. It needs a base,some metal or wood cross pieces to secure it. It folds pretty flat as well. It will be put to the test,and any modifacations made this Sat.

[bebanovich]

This is great! I'll be watching for updates (with maybe some select close-ups . . . pretty please).

[aka_locojoe]

That looks pretty slick tikiharl.

[stretch]

may have to try that one. how much did you spend in materials?

[Uncle Stretch]

I have seen these elaborite frame jigs , and unless it will hold all the tubes in place while you tack weld them ,they are not really needed. When you think about it, all the tubes in a frame need to be inline. The simplest way to do that is to build the body of your frame on something flat. Given that all of your tubing is the same thickness ,laying them on some flat surface and tack welding them together will give you a straight frame. Then add the things that are a differant size....the neck tube and the rear stays after you have your main part straight. Your neck will always be at the same height in relationship to the ground...unless you build a really wild long set of forks. My jig is a piece of the track from a craftsman garage door opener. It has a 1'' pipe welded square to the track, on one end and 12 1/2'' up an axel drilled through the pipe to hole a fork. I stick any fork on the axel and tighten 4 nuts on it to keep it in place ...then slip the neck you using on and weld the body of the bike to it. Then add the rear stays. You can go from the front to the back on both sides with some string and make sure everything is the same . Works pretty good. Will produce a frame that is straight and useable.

[Sinner4]

Its too bad that "Budzilacycles" pictures from his post are gone, I picked up ths same steel tracks that "Tikiharl" used to build his. And Stretch yours is super simple and works fine. For me I'm kinda tired of the concrete floor for building on a flat surface. I picked up a exercisor strider deal that will serve as the base. Or if thats too low I have a set of steel saw horses to get it up higher. This cold weather is putting a cramp in the winter building deal. Also the 40 mile an hour wind gusts dont help either.

[Highridah]

I needed to come up with a basic inexpensive jig to make my next Burrito build a little more precise than "hows that look?" and ''hold this while I tack it". I had always thought the unistrut idea would be a good way to go,mostly because of the adjustments that could be made. On this I used 6" conduit spacers ,8" bolts and 3 sticks of unistrut. I even have a small crossbar that in theory could hold the BB in place,the BB should be craddeld in the open area of the unistrut. It needs a base,some metal or wood cross pieces to secure it. It folds pretty flat as well. It will be put to the test,and any modifacations made this Sat.

got the measurements for the pieces i would ike to make this rack

[Sinner4]

My frame jig.
viewtopic.php?f=3&t=37648

[isaiah3g]

Wow! seems like allot of people are really gettin creative with their jiggin' not the dancin jiggin

I will be headed home this weekend and I'll be sure to take pics of our frame jig. We use the stingray rear swingarms and the bottom bracket from them and build everything else.

http://www.facebook.com/3gfabrications web page coming soon!...ish