Tool-Free Chisel Knob and New Clamping Face
My Jet mortiser came with a brass screw to retain the hollow chisel. It worked fine, but was a little cumbersome to hold a screwdriver while setting the bit square to the fence.
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So I traded the screw for a handled knob. The new knob comes with the Powermatic 701 mortiser, and is compatible with the Jet JFM-5 and Powermatic 719. The knob has a threaded post with a brass tip to prevent marring the chisel. This setup makes it much easier to change and adjust the chisels.
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I also added a wood block to the face clamp. The wood block has self-adhesive sandpaper for added grip. The block is screwed in place through existing holes in the clamp face. Now you don't have to tighten the clamp very much to hold the workpiece in place.
Cheers
My Jet mortiser came with a brass screw to retain the hollow chisel. It worked fine, but was a little cumbersome to hold a screwdriver while setting the bit square to the fence.
-
-
-
-
-
So I traded the screw for a handled knob. The new knob comes with the Powermatic 701 mortiser, and is compatible with the Jet JFM-5 and Powermatic 719. The knob has a threaded post with a brass tip to prevent marring the chisel. This setup makes it much easier to change and adjust the chisels.
-
-
-
-
-
I also added a wood block to the face clamp. The wood block has self-adhesive sandpaper for added grip. The block is screwed in place through existing holes in the clamp face. Now you don't have to tighten the clamp very much to hold the workpiece in place.
Cheers