Floor Mortiser Mods and Improvements #1: Tool-Free Chisel Knob and New Clamping Face

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Blog entry by pintodeluxe posted 01-16-2015 07:10 PM 4908 reads 1 time favorited 2 comments Add to Favorites Watch
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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.


-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

2 comments so far

View stevo_wis's profile


128 posts in 4240 days

#1 posted 01-16-2015 07:38 PM

That trick with the block and sandpaper may be all I need. It is so simple. I always seem to overcomplicate things.
I will give it a try. I also like the knob idea instead of a screwdriver.

-- Stevo

View Roger's profile


21055 posts in 4017 days

#2 posted 01-18-2015 12:24 PM

Sandpaper will definitely hold anything in place.

-- Roger from KY. Work/Play/Travel Safe. Keep your dust collector fed. [email protected]

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