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Benchtop Hold-Downs Offer Flexible Clamping

Unable to clamp together complex assemblies? No problem! Using one reader's benchtop clamping system you'll have no trouble mounting pipes in the flanges.

I needed to clamp together a complex assembly with pieces arranged at a couple of different levels. But my standard clamps lacked the reach and versatility that I needed, so I came up with a benchtop clamping system that adjusts to most any project.

I based the system on Pony #56 Pipe Clamps, which have the release clutch and clamping screw both located in the head assembly. I began by drilling 1 1/16" holes through my benchtop and then mounting pipe flanges on the underside of the bench.

Now, I can mount 3/4" pipes of various lengths in the flanges, then slide one or more Pony #56 clamps onto the pipes. To hold a piece above the benchtop, I flip the bottom clamp upside down, then clamp the workpiece between the two opposing clamps.

The flange threads are tapered, so you can screw a threaded pipe end into the flared end of the flange only. You need to position the flange with the flared end facing upward, and add a 3/4"-thick wooden ?doughnut.? Also, when mounting the flange, install a piece of pipe in it for proper alignment.

When I'm not using the clamps, I drop short pieces of 3/4" schedule 40 PVC into the holes. They sit on top of the flanges, flush with the benchtop, and give me a plastic-reinforced hole that fits a 3/4"- diameter bench dog.

- Aaron Butler, Danville, Pa.

For more in-depth information on gluing and clamping, visit our Gluing and Clamping section in the WOOD Store.


Comments (2)
Gman1963 wrote:

Awesome Idea! Thanks

11/17/2011 09:26:23 PM Report Abuse
michael.rhum wrote:

Very clever. I'm definitely going to try this one.

9/17/2011 01:17:13 PM Report Abuse

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