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post #1 of 44 Old 02-08-2016, 08:45 AM Thread Starter
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Clamp question?

In your guys opinion, I found on Amazon bar clamp ends by Irwin, they sell them in 1/2 and 3/4 inch sizes. Is there a noticeable difference in either one, does the 1/2 have enough flex for a 6 foot clamp to be an issue? Does anyone have the Irwin ones and does not like them, should I get grizzly or pony? At this point I am jointing boards to make a 27" shelf. Figured I may as well go ahead and get the 6 foot pipe, trying to save money where I can. Any advice you guys have for me would be greatly appreciated.
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post #2 of 44 Old 02-08-2016, 08:51 AM
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I sometimes bend 3/4" clamps especially if galvanized pipe is used. I wouldn't want to go smaller. I've never used the grizzly or Irwin. It's the pipe that matters. The black pipe has a thicker wall than water pipe.
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post #3 of 44 Old 02-08-2016, 10:02 AM
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I only use 3/4" but ....

You don't need to bend the pipes to get good clamping pressure, so 1/2" should work. I just started with 3/4" and stayed with it.

a discussion on WWT:
http://www.woodworkingtalk.com/f2/cl...-print/index2/


I knew Leo had said he used only 1/2" clamps:
http://www.woodworkingtalk.com/f11/p...s-36440-print/
Leo G's clamp rack shows a lot of 1/2" Ponys unless I'm mistaken:


This image has been resized. Click this bar to view the full image. The original image is sized %1%2.

The clamps Leo uses in use:

The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)

Last edited by woodnthings; 02-08-2016 at 10:28 AM.
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post #4 of 44 Old 02-08-2016, 10:20 AM
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I have 1/2" and have never had a bending problem when using 6' or 7'. They are lighter than 3/4" and therefore easier to maneuver.

The secret of not bending a clamp is to not over tighten. This not only bends clamps, it does not provide the best joint.

George
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post #5 of 44 Old 02-15-2016, 07:41 PM Thread Starter
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I went with 3/4. Figured I'm covered if I need to go really long. Thanks for all the advice.
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post #6 of 44 Old 02-16-2016, 10:30 AM
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Using mostly 1/2" black pipe for many of my projects seems to "hold" things together OK. For a variety of lengths, I have 2', 3', & 4' threaded pipe pieces to attach together with connectors giving extra long pipe lengths when needed. Be safe.
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post #7 of 44 Old 02-16-2016, 01:55 PM
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Only time I've bent a 1/2" pipe was when I was misusing it. I bent a 3/4" once using it as a pry bar...

I like the 1/2" clamps better(weight/size), but seem to have more 3/4". I like the handles on the 3/4" better.
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post #8 of 44 Old 02-18-2016, 12:40 AM Thread Starter
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I just got the clamps from jet.com. Had a 25% off coupon. Got 6 3/4" clamps for $81. Looked everywhere and could not beat that. Only chance I had to beat it would be if someone was selling theirs on Craigslist or something like that but found none. I bought the pads from pony. $1.29 each. Just need to go buy the pipe. Home Depot and lowes have 10' for just under $14. Going to buy 2 and have them cut into 3 sections each. Will do what I need for now. Great part is if I need longer just have to buy pipe. So far very happy with them. Thanks for the replies guys. All good advise, you can never have too much good advise, just have make the final decision on your own based on experience of others and personal experience.
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post #9 of 44 Old 02-18-2016, 12:47 PM
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If your bending a 1/2" pipe while clamping you better rethink your joints.You're doing something wrong.
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post #10 of 44 Old 02-20-2016, 08:09 PM Thread Starter
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Got my clamps and made a rack today. Thanks for all the advise. So far I am very happy with them. Clamp question?-imageuploadedbywood-working-talk1456016991.581303.jpg
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post #11 of 44 Old 02-20-2016, 08:32 PM
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Looks like Jorgenson 3/4" with black pipe. Good choice. Try not to be tempted by sale prices on other brands now that you have chosen. Each brand seems to have a different height and mismatches can create difficulties. I see they are also the same lengths. That can pay dividends as in the last Woodenthing's picture in post 3.
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post #12 of 44 Old 02-20-2016, 09:01 PM
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just to be clear ...

Those are Leo G's 1/2" pipe clamps in HIS really cool clamp storage rack. :smile3:

The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)
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post #13 of 44 Old 02-21-2016, 11:58 AM Thread Starter
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Quote:
Originally Posted by Old Skhool View Post
Looks like Jorgenson 3/4" with black pipe. Good choice. Try not to be tempted by sale prices on other brands now that you have chosen. Each brand seems to have a different height and mismatches can create difficulties. I see they are also the same lengths. That can pay dividends as in the last Woodenthing's picture in post 3.
not sure what you are getting at by paying dividends?
i see your point about not picking up for example irwin pipe clamps because they may line up and hold things the way i need them to because of the difference in the clamps. thats a good point and i never thought about that before. Thanks for the tip. :smile3:
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post #14 of 44 Old 02-21-2016, 01:26 PM
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Quote:
Originally Posted by GeorgeC View Post
I have 1/2" and have never had a bending problem when using 6' or 7'. They are lighter than 3/4" and therefore easier to maneuver.

The secret of not bending a clamp is to not over tighten. This not only bends clamps, it does not provide the best joint.

George
Over 8,000 posts....and you give poor clamping advise.

You can put light pressure on somethings but pipe clamps are designed for maximum pressure. If there not bending there not making the best joint possible.
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post #15 of 44 Old 02-21-2016, 03:15 PM
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Quote:
Originally Posted by raqumup View Post
not sure what you are getting at by paying dividends?
i see your point about not picking up for example irwin pipe clamps because they may line up and hold things the way i need them to because of the difference in the clamps. thats a good point and i never thought about that before. Thanks for the tip. :smile3:
I think the dividends he was referring to was the fact that in that glueup the clamps are being used as legs for the top. Since th e clamps are all the same length, they all hit the ground and give good support. If 3 of your clamps were 3 footers and the 4th was a 4 footer you couldn't do that

Quote:
Originally Posted by Rebelwork View Post
Over 8,000 posts....and you give poor clamping advise.

You can put light pressure on somethings but pipe clamps are designed for maximum pressure. If there not bending there not making the best joint possible.
That seems like much worse advise. If your clamps are bending during a glueup, your joints need work, and if the joints are good and you're bending clamps anyway, you're squeezing all the glue out from the joint and making the joint worse

Don't believe me? This guy put numbers to it:
https://woodgears.ca/joint_strength/glue_methods.html

I need cheaper hobby
etsy.com/shop/projectepicfail
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post #16 of 44 Old 02-21-2016, 04:34 PM
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"if the joints are good and you're bending clamps anyway, you're squeezing all the glue out from the joint and making the joint worse"
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post #17 of 44 Old 02-21-2016, 04:52 PM
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There are a few differences between the 1/2" and 3/4" clamps. Obviously the pipe diameter. But the head of a 1/2" clamp has a sliding handle, the head of the 3/4" clamp has a fixed handle. This can make a big difference in close quarters.

The 1/2" clamp seems to be best suited to 3/4"-1" thick material. The 3/4" clamps best suited for 1" to 1 1/2" material.

Since most of the material I glue up is 13/16" the 1/2" works well for me. If you need to put a lot of pressure on a clamp then you can balance it with another clamp on the top of the project. With equal pressure your project stays flat.

Measure Twice Cut Once -- It's a lot easier to cut more off then it is to cut MORON.
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post #18 of 44 Old 02-21-2016, 05:25 PM
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How about an explanation of this set up? Only 3 clamps on that large a piece doesn't make sense to me....?

The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)
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post #19 of 44 Old 02-21-2016, 05:30 PM
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Looks like what ever it is they are gluing together is only 2 sections. So the normal stiffness of the material is probably good enough for the 3 clamp system. I would have used 6

Measure Twice Cut Once -- It's a lot easier to cut more off then it is to cut MORON.
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post #20 of 44 Old 02-21-2016, 05:52 PM
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Quote:
Originally Posted by woodnthings View Post
How about an explanation of this set up? Only 3 clamps on that large a piece doesn't make sense to me....?
There is originally 5 -7 clamps to start. After 2-3 days excessive clamps are removed but because of the thickness(5.25) the glue can still be wet in the dowel sockets and some clamps remain till it hits the planer and off to finishing...
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Last edited by Rebelwork; 02-21-2016 at 06:01 PM.
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