Bare Bones Bicycle Fork Jig

Step 10 Install and align the V-block

To align the V-block, you'll need a straight piece of tubing, the straighter, the better.

Loosely thread in the M8 bolts into the V-block and slide it into the main beam until you can see the allen heads through the axle holes. Tighten them finger-tight.

Clamp your tubing in the V-block clamp and extend it so it meets up with the dummy axle beam. Using calipers, measure the distance from the edge of the beam to the tubing. Then measure from the other side of the beam and compare. If they're not the same, nudge the tubing until it's centered on the beam. Tighten the V-block bolts down once you have it centered.

Now, as a test, I recommend you rotate your tubing 180 degrees and measure again. If the numbers have changed, that means your tubing isn't straight. So you'll have to loosen the bolts and nudge the tubing over to make up half of that difference.