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Shop Notes WorkBench Top with Hold down Tracks
Shop Notes
Workbench Top with
Hold-Down Tracks
Traditional-style workbenches provide several means
for securing your work. Unfortunately, they are
expensive to purchase and time consuming to make.
Some of us are limited by existing space and benches.
I decided to modify my existing 30 inch by 14 foot
workbench by adding hold down tracks, rather than
a side vise and tail vise.
I've used these two hold-down patterns elsewhere in my
shop. They are made from laminated hardwood scrap,
3/8 X 16 t-nuts, and carriage bolts with their heads ground
flat on two sides so they can be inserted anywhere along
the track. Templates and tool bases can also be secured
to the workbench using the tracks.
The existing workbench was an inch and a half thick
lamination of plywood. On top of this, I glued down a
layer of 3/4 inch Medium Density Fiberboard. A router
cuts the grooves for the aluminum tracks and the clearance
groove for the bolt head. The dimensions shown are for
3/8 X 16 carriage bolts and 1 X 1/8 aluminum bar stock.
It's worth the time to cobble together a template to rout
the grooves for the tracks. The aluminum bar stock is cut
to length, and drilled and countersunk for wood screws.
In this case I was sure to use screws long enough to
penetrate the first plywood layer. I doubt that the MDF
has enough pullout resistance for this use.
Grind
Large hold-down. Track shown
and buff
partially cut away.
2-3/8"
Modified bolt head
1"
1/8"
1/2"
7/8"
Section through track. Small hold-down.
©2001 Dale Austin www-personal.umich.edu/~mrwizard
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