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post #1 of 17 Old 03-13-2013, 11:41 AM Thread Starter
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clamp issue?

So o bought 2 of these clamps 36 inch to glue up a counter I'm building for my house. And these grooves showed up in both of my clamps. Is this normal for these clamps? Did I clamp to hard? Should I be concerned with this?
Thank you in advanced
-justin

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post #2 of 17 Old 03-13-2013, 11:46 AM
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I do not own what looks like a the Jorgensen parallel clamp.

I have the Jet parallel clamps, which have a bar with notches for the jaw to lock onto. The Bessey parallel clamps also are notched.

I think this may be normal for the Jorgensen. The jaw needs to grip on the steel. Likely has serrations or separate plates like a pipe clamp design, which also marks the pipe.

I would not worry. If the marks prevent the jaw moving, you may need to file them down, but otherwise I would leave them alone.
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post #3 of 17 Old 03-13-2013, 11:49 AM
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It takes a lot of pressure to drive the clutches that deep into your bar.

Maybe try gluing up fewer pieces at a time so you dont have to crank so hard.

Hit the bar with a file to clean it up, you'll be fine.

Scott
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post #4 of 17 Old 03-13-2013, 11:58 AM Thread Starter
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So your saying I clamped to hard (inexperience shows here) . :) my bad, funny you should mention glue up I did do it in sections actually, 4 sections actually. This was the 5th and final glue up now on to routing it flat.
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post #5 of 17 Old 03-13-2013, 12:13 PM
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It will take you awhile to find out what type of pressure is desired.

You want the joining faces to have no gaps. If you use the clamps to close gaps, the wood is stressed and can result in future problems.

With the parallel clamp hand screw, I may apply more pressure than others.

The key is that the clamps are applying consistent pressure and all parts of the joining faces are touching. Not easy to see with the squeeze out, but any gaps will jump out after you have removed the squeeze out.

The parallel clamp are the best for applying even pressure, but even this design it is possible to apply more force on one edge than another edge resulting in a gap due to the clamp. Been there, done that. Not fun.
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post #6 of 17 Old 03-13-2013, 12:18 PM Thread Starter
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This was my clamp setup for this project

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post #7 of 17 Old 03-13-2013, 12:40 PM
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Glue up looks good

You could use some heavier cauls on the sides and you wouldn't need so many clamps.

Where is your bench?

That has got to be hard on your back/knees.

Scott
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post #8 of 17 Old 03-13-2013, 12:49 PM
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Quote:
Originally Posted by mdntrdr View Post
That has got to be hard on your back/knees.
When I made my 9 cutting boards for Christmas gifts this past year, I glued them up on the kitchen floor as my garage is not heated.

Some day I yearn for a heated shop....

Mark

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post #9 of 17 Old 03-13-2013, 12:49 PM Thread Starter
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Lol bench, yeah I don't have one yet...and even if I did its too cold in my shop currently(unheated garage in Vermont) to use glue so I glue up in the basement. Funny story about that, I came down this morning to check on it and alas my damn cat threw up on the piece.
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post #10 of 17 Old 03-13-2013, 12:55 PM
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post #11 of 17 Old 03-13-2013, 01:20 PM
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Funny story about that, I came down this morning to check on it and alas my damn cat threw up on the piece.
Alas one more reason why I won't have a cat...

Mark

"Measuring is the enemy of accuracy." Chris Schwartz
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post #12 of 17 Old 03-13-2013, 01:28 PM Thread Starter
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I personally dislike cats, one came with the fiance the other dumped on me by my brother. I rather my dogs which we have 2 of and my chickens.
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post #13 of 17 Old 06-25-2013, 08:53 PM
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Unhappy Clamp issue

I have the same clamps and also some Bessey's I ended up with the same grooves on the Jorgensen. I probably did over tighten them so I will try less pressure. I like the feel and smoothness of the Jorgensen's and that they are US made, but not the grooves. I concerned that filing will probably remove the plating.

TD
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post #14 of 17 Old 06-25-2013, 10:36 PM
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Mine have the indentations....and have never affected performance.

The tools don't make the craftsman....
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post #15 of 17 Old 06-26-2013, 12:25 AM
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Quote:
Originally Posted by Burb

Alas one more reason why I won't have a cat...
I understand. That's the reason I don't have kids.

Kidding!

I've seen dogs puke but I've never had a cat try to romance my leg or sniff my privates.

Has a kitten once that would fetch a ball. Too bad she grew out of it.

When I die, I want to go peacefully like my grandfather did in his
sleep. Not yelling and screaming like the passengers in his car.

Jack Handey
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post #16 of 17 Old 06-26-2013, 06:58 AM
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That type marks is unusual for that type clamp. Normally the bar is harder than that. I don't believe I would buy any more of them.
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post #17 of 17 Old 06-26-2013, 10:06 AM
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I bought 10 of those clamps a couple years ago. I will have to look at the bars and see if there are any marks on them. I've cranked down pretty hard on mine at times.

Thanks for your help
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