All of these examples use the same size tubing or next
size up as what they're mounted on. The strap is made by
cutting about a 40mm wide piece of the large tubing. Weld
on a small tube along with a nut at the end of that tube.
Alternatively use a long nut.
Split both tubes with a metal
saw to make the clamp gap. If using the long nut, drill
out the thread on the side with the longest tubing. On a
few occasions I've found I needed to split the tubing
first and open the gap a little before welding on the
mount tube.
- Using 2 wheels on different sides. See pic 1, pic 2, pic 3 and drawing. I
mount the wheels close enough to capture the
chain so it can't jump the groove.
- Using a mount on both sides See pic 1, pic 2 and drawing
- Using a single mount on one side. (Will work best
if the clamp can be slid on the boom as bending
it open to get on a boom may end up splitting the
clamp. See pic and drawing
