Refurbishing a Rusted Up Old “F” Style Type Clamp

Pictured below is an old “F” style type clamp that I picked up at a flea market. Canton Trade Days in Canton, Texas to be exact. It was frozen up such that you could neither turn the threaded rod nor move the sliding arm member. Both of these parts were corrosion welded to their adjacent clamp parts. Although rusted up with no certainty that I could free up the frozen parts, I thought it was neat looking so I bought it.

For starters, I sprayed the clamp with WD-40. After several soakings, I managed to unfreeze the sliding arm part of the clamp, after repeated light taps with my medium size hammer. Now if I can just get the threaded rod freed up.

I sprayed the threaded rod with WD-40 and then left it alone for several days. After several days, I still could not turn the threaded rod. Not deterred, I sprayed the threaded rod again with WD-40 and lightly tapped the metal bar perpendicular to the threaded rod with my hammer. I repeated this process of spraying & lightly hammering several times until the threaded rod finally moved a little ( approx. 10 to 20 degrees).

With the threaded rod starting to ever so slightly starting to break free of its’ corrosion weld, I sprayed the threaded rod. Next I started working at turning the threaded rod back and forth. I repeated the WD-40 spraying and turning back & forth, the threaded rod. The metal pipe slipped over the metal bar perpendicular to the threaded rod, gave me the leverage I needed. Finally the threaded rod was completely free and turned easily thruout its’ entire length.

The clamp and tools I used for bringing this clamp back to life are shown in the photo below. The cloth gloves helped somewhat in keeping my hands clean. During this restoration process, I used the WD-40 and wire brush for removing the worse of the rust built up over the surface of the clamp. The hammer and metal pipe I used are also shown in this photo.

Dimensions for this clamp are shown in the following sketch.

What follows are four photos providing a closer view of some of the clamp parts.

Glad I was able to break the corrosion loose from this clamp. It has proved to be very handy. I can clamp down solidly on wood members with it. I do not know how old it is, but it looks ancient. And I like nothing better than being able to use an old tool in the shop. It’s that connecting with the past thing, you understand.

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Until next time, take care.