Bare Bones Bicycle Fork Jig

Step 8 Drill the access holes on the main beam

You will need to drill some access holes so you can reach the mounting bolts for the V-block and handle with an allen wrench.

For the V-block, drill the four holes in the T-slot groove. The two holes in each groove should be 1.5" apart to match the holes in the V-block. Mine start out at about 20" from the end of the beam. Depending on what size forks you build, you might want to adjust this. You might even want to drill a couple sets of access holes.

For the handle, drill a hole around 10" from the dummy axle end of the beam. If you're really anal, finish building the jig, put a fork in it, and find the balance point.

Drill the access holes with a 13/32 drill bit.

One other option would be to mount and align the V-block to a short piece of 8020, and then clamp that to the side of the main beam. The third picture shows the basic idea, from my frame jig design. This would let you slide the V-block around without losing alignment, and gives you more access and clearance to the crown area. This would probably be the way to go if you're brazing a lugged fork crown.