clamping block

With the clamping blocks, join the leg frames with the other rails forming two half hexagons.

Pin the angled offcuts from the legs on to a scrap piece of wood to make an excellent cradle for planing and also for clamping blocks.

For example, the clamping block, rotating form block and pressure die are often formed from the hardened steel because the tubing is not moving past these parts of the machine.

Tube bending as a process starts with loading a tube into a pipe bender and clamping it into place between two dies, the clamping block and the forming die.

The upright post can be adjusted to tilt back or forward, effectively moving the scriber point up or down in a controlled fashion, coarse adjustments are made by sliding the scriber along its clamping block.