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Step 1The Frame
The frame is built out of 8020 #1530 extrusion. I used the standard 1530 extrusion - there is also a 1530L extrusion that is a little lighter that you could probably use, especially on the adjustable beams that hold the tubes. This would make the jig a little lighter and cheaper
You could probably even build it out of the #1020 extrusion and it would be just fine.
The overall dimensions I used, which should work for most mtbs and large road frames, are 30 inches tall and 51 inches wide. If you want to build 29ers with long-travel forks, you might want to scale everything a couple of inches taller.
At the lower right hand corner the two frame beams are held together with a #4334 Inside Gusset Corner Bracket, so the lower beam is shorter - 48 inches long.
The other three corners are held together using just 16mm M8 buttonhead bolts and 8020 Double T-nuts. The beams are drilled to provide allen wrench access to the bolt heads.
Assembly is easy. Use a T-square to get each join at a 90 degree angle. Tighten it down.
You can order 8020 extrusion and parts from a variety of resellers - see 8020's web site. If you're in the Western US, I highly recommend F & L Industrial Solutions.
We'll look at the rest of the parts in the order they would be adjusted to set the jig up to the right dimensions.
You could probably even build it out of the #1020 extrusion and it would be just fine.
The overall dimensions I used, which should work for most mtbs and large road frames, are 30 inches tall and 51 inches wide. If you want to build 29ers with long-travel forks, you might want to scale everything a couple of inches taller.
At the lower right hand corner the two frame beams are held together with a #4334 Inside Gusset Corner Bracket, so the lower beam is shorter - 48 inches long.
The other three corners are held together using just 16mm M8 buttonhead bolts and 8020 Double T-nuts. The beams are drilled to provide allen wrench access to the bolt heads.
Assembly is easy. Use a T-square to get each join at a 90 degree angle. Tighten it down.
You can order 8020 extrusion and parts from a variety of resellers - see 8020's web site. If you're in the Western US, I highly recommend F & L Industrial Solutions.
We'll look at the rest of the parts in the order they would be adjusted to set the jig up to the right dimensions.
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Apr 28, 2009. 12:45 AMelranathor
says:
Great job, nice jig, i'm just going to have to build a similar one now!
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