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The fence on my 24" box and pan break is a piece of 2 x 3/16" aluminum that mounts to two t-slot extrusion arms. The aluminum has press fit dowel pins that mate with self-squaring t-slot nuts in the arms. The arms are mounted to the break body with two screws each. I used a dowel jig/drill bushings to insure the arms were mounted square/parallel. The sub-fence is a removable strip of stainless steel that allows making really short bends. The screws that clamp the fence to the arms have 5/16" drill rod heads (flat on the bottom). The drill rod head provides needed clearance and can be tightened with an open end wrench.
Sheet Metal Box Break
The fence on my 24" box and pan break is a piece of 2 x 3/16" aluminum that mounts to two t-slot extrusion arms. The aluminum has press fit dowel pins that mate with self-squaring t-slot nuts in the arms. The arms are mounted to the break body with two screws each. I used a dowel jig/drill bushings to insure the arms were mounted square/parallel. The sub-fence is a removable strip of stainless steel that allows making really short bends. The screws that clamp the fence to the arms have 5/16" drill rod heads (flat on the bottom). The drill rod head provides needed clearance and can be tightened with an open end wrench.
