Bench Dog Clamp Insert

by Elproducts, published

Bench Dog Clamp Insert by Elproducts Jul 21, 2017


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I designed plugs in tinkercad to fill the bench dog holes (5/8" holes) in my Harbor Freight Bench. I made them with a nut insert so I could screw in CNC style clamps. Details are in my video:

I added an metric M6 Insert and Knob version for those outside the USA. I originally used an M6 Bolt and Nut in the first design but then couldn't find a long enough bolt (2 1/2") in metric so I changed the design to 1/4-20 since I had many of those.

Print Settings

Printer Brand:



Prusa Mk2






0.2, 0.3


25% and 50%

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Hi Chuck,
hole size for nut in KnobBoltM6.stl is too small. You put hexa 8mm flat and M6 nut is 10mm.
Congratulations for your good job