I bought these $4.00 bar clamps from Harbor Freight. I ground off the dimple at the end of the bar and that allows the clamping ratchet to be removed. I also ground a chamfer on the end of the bar to make insertion back in the ratchet mechanism easier.
I slip off the ratchet end, and fit the bar through a hole in the MFT-like top I made, and then reattach the ratchet. This is a medium duty to light duty clamp, but it is perfect as a hold-down.
The modification took about 5 minutes with a bench grinder. A right angle grinder would work also.
https://www.harborfreight.com/12-in-ratcheting-bar-clampspreader-62123.html
I slip off the ratchet end, and fit the bar through a hole in the MFT-like top I made, and then reattach the ratchet. This is a medium duty to light duty clamp, but it is perfect as a hold-down.
The modification took about 5 minutes with a bench grinder. A right angle grinder would work also.
https://www.harborfreight.com/12-in-ratcheting-bar-clampspreader-62123.html