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post #1 of 12 (permalink) Old 03-19-2019, 09:07 AM Thread Starter
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Default 4 way clamps

Has anyone here used this type of clamp with glue ups? If so how did they work and whats your opinion on the price of these from Peachtree Woodworking? Thanks for any info.

https://www.ptreeusa.com/edirect_031819_4way.htm
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post #2 of 12 (permalink) Old 03-19-2019, 10:58 AM
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They look interesting. The idea seems pretty sound and that's not a bad price. The pressure pads are plastic so you couldn't put too much pressure on them but a couple of these about every 18-24" to keep the boards even plus a few regular clamps might work well.

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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post #3 of 12 (permalink) Old 03-19-2019, 11:53 AM
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I have them and use them occasionally. They work as described, but I find them awkward to set up and use. Trying to get both the top and bottom bars in the correct slots and determine which slots to use is very time consuming. If I had been able to try them before buying, I would not have made the purchase.

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post #4 of 12 (permalink) Old 03-19-2019, 12:00 PM
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I had 10 of them years ago that I bought at WoodCraft and would use them to glue up 5 cutting board blanks at a time when I was going through my cutting board phase.
They worked very well, but additional clamps had to be added sometimes to flush the boards at the ends.
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post #5 of 12 (permalink) Old 03-19-2019, 03:06 PM
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I bought a set (i.e. a pair) years ago, but only used them recently when gluing up some smallish panels. Agree with Oliver that they require “management” to set up - I am thinking of using sticks of somewhat thicker timber to keep the 2x2s apart, when inserting the next batch of boards to glue up. Otherwise a bit of cat-herding required.
Also agree with Herb that additional clamps may be required, especially if there is some bowing in one of the boards. I would have preferred parallel-jaw clamps, but those are hellish expensive in this neck of the woods, whereas these clamps (Chinese made) for once were about half the price here compared to the Peachtree price.
But in the final analysis, they do work as described.
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Quote:
Originally Posted by Cherryville Chuck View Post
. The pressure pads are plastic so you couldn't put too much pressure on them but a couple of these about every 18-24" to keep the boards even plus a few regular clamps might work well.
Charles, I managed to get adequate pressure with two of these clamps on 60cm length boards. I somehow donít think the plastic parts are the limiting factor, so much as the design. You will know much more about force vectors than I do, but I suspect that the force applied by the screw is split between the horizontal clamping force and the vertical aligning forces.
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post #7 of 12 (permalink) Old 03-19-2019, 07:37 PM
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Wold these be the same as using BowClamps?

http://www.jackdurencabinets.com/homepage.htm

Last edited by Rebelwork Woodworking; 03-19-2019 at 07:39 PM.
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post #8 of 12 (permalink) Old 03-19-2019, 09:49 PM
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Quote:
Originally Posted by Biagio View Post
Charles, I managed to get adequate pressure with two of these clamps on 60cm length boards. I somehow donít think the plastic parts are the limiting factor, so much as the design. You will know much more about force vectors than I do, but I suspect that the force applied by the screw is split between the horizontal clamping force and the vertical aligning forces.
The amount of force applied to the tooth as opposed to the bar itself is proportional to the sine of the applied angle. I.E., the thicker the panel the more force on the bar and vice versa.

BTW, I have 4 Bessey parallel clamps and if I could find someone who had comparable lengths in Jorgensen clamps I would trade them even in a heartbeat. I really don't like those Bessey K body clamps. Trying to hold the head end in position while trying to tighten the mechanism with only one hand is very hard to do.

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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post #9 of 12 (permalink) Old 03-19-2019, 10:42 PM Thread Starter
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Thanks everyone for your feedback about the clamps. I think I may hold off for now on then but keep them on a future idea list.
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post #10 of 12 (permalink) Old 03-20-2019, 10:36 AM
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I have two pairs of these and use them often. Yes, they are a little tricky to set up, but gets easier the more you do it. Depending on the size of your glue up there may be need for additional clamps. I especially like the versatility - you can make them about any length you want by the selection of your supplied lumber.
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