$37.99 Each
In stock
Adjustable length clamp provides pressure from all four sides for big projects like gluing table tops and shelving.

4-Way Equal Pressure Clamp

Item #
20981
Rating:
68% of 100
Adjustable length clamp provides pressure from all four sides — ideal for big projects such as gluing table tops and shelving. To make wood pieces, drill a series of 5/8" holes spaced 2" apart down the center line of the board face of a 2x4 piece of lumber. Then rip the board lengthwise through the centers of the holes, creating two pieces approx. 1-1/2" x 1-11/16". Rotate the notched boards so that notches are away from each other.

Features:
  • Applies pressure on workpiece face when edge-clamping to prevent bowing and buckling large panels
  • Clamp attaches to any length 2 x 2's (lumber and wood clamp pads not included)
  • One Clamp per Package
  • Includes one set of 2 parts (Two sets shown in photo)
(1) 4-Way Equal Pressure Clamp
More Information
Brand Rockler
Manufacturer Part Number No
Weight 3.1500
Tech Spec No
Tech Docs
Capacity No
Grip Style No
Jaw Depth No
Clamp Pressure No
Type No
Jaw Width No
Length No
Prop 65 WarningWARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov

3.4 / 5.0
55 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
18
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12
Great panel clamp tool
These work great as I do a lot of board panel gluing. I used 1-1/2" oak for the notch bar and before cutting in half I painted one of the ends with a different color so that the notches would all line up and be identical match when clamping. To make things easier I made sure that the bottom part of clamp that goes into the notch was on a flat surface and in the notch so all that was needed then was to slide the top notch board through the clamp fixture and apply the pressure to the panel and every panel I did came out flat as could be. I did use wafers to help line up the edges. I put wax paper over the notch bars so that the glue wouldn't stick to the them.
July 6, 2018
Purchased
3 months ago
Woodworking Experience:
Advanced
great
love them both
June 30, 2018
Purchased
3 months ago
Woodworking Experience:
Intermediate
Yes I would recommend these if you are making chest or just pairing two boards . I would recommend them.
May 23, 2018
Purchased
1 year ago
Woodworking Experience:
Intermediate
Excellent clamping system for table top creation
There is some effort required to make the wood bars that apply pressure to your piece. However, I have found the clamps provide the 4 way pressure needed that no other system does. The hint that one other reviewed provided about using bees wax to prevent the bars from sticking to the work piece do to squeeze out was perfect. I current own two sets am buying two more.
January 26, 2018
Woodworking Experience:
Advanced
Very well made.
I have not gotten a chance to use these yet, but they seem real well made.
May 28, 2017
Purchased
1 year ago
Woodworking Experience:
Advanced
Good design. It does what it is made to do and does it well. Great for glue-ups of all sorts of table and counter tops.
May 27, 2017
Purchased
1 year ago
Woodworking Experience:
Intermediate
very well made clamp looking to be using these clamps for years to come
May 27, 2017
Purchased
1 year ago
Woodworking Experience:
Intermediate
Very happy with these. No slipping and sliding of glue joints. Nice flat panels
December 28, 2016
Purchased
1 year ago
love it
I was working on my own design but like yours better. works great just as it should
December 19, 2016
Purchased
1 year ago
Woodworking Experience:
Advanced
Best product
This is a surprise for husband he has been drooling over them online.
December 18, 2016
Purchased
1 year ago
Woodworking Experience:
Advanced
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 7 questions Browse 7 questions and 57 answers
Why did you choose this?
Rockler Store
It will assist me in the way I want for my wood projects
Ward F on May 31, 2018
to build a small table from salvage long leaf pine for my wife
Robert H on May 31, 2018
It will assist me in the way I want for my wood projects
Ward F on May 31, 2018
Rockler quality. I have begun gluing up mor panels.
Raymond D on May 31, 2018
to build a small table from salvage long leaf pine for my wife
Robert H on May 31, 2018
I used to have a set very much like these, apparently someone needed them more than I did, so I had to get another set
Matt D on May 30, 2018
It will be a very useful item for gluing up large projects.
Thomas G on May 30, 2018
Love my other clamps
Bruce C on May 30, 2018
need it for a project I'm working on.
Simon K on May 30, 2018
They were on sale and i have a project coming up where I will be gluing large panels together.
Ryan G on May 29, 2018
try my luck at building a farm table.
John C on May 28, 2018
I've been wanting a pair for a long time. If I recall correctly, ShopSmith was the only place you could get these in the 1980s. So yes, a long time. (grin) This sale price was the first time I've seen this type of clamp for anything reasonable.
Quin L on May 27, 2018
Cause I wanted them!
HOWARD D on May 27, 2018
Saw a YouTube video of some guy using them. I frequently glue up panels. So, this is just the ticket.
Darrell on May 27, 2018
Have a new special dining room table to make.
William B on May 27, 2018
easy to make custom cauls of varying length without having to remove hardware. Will see just how finicky it is to use.
Troy M on May 26, 2018
Looks like a tool that will make my work simpler. May buy another later.
Larry G on May 26, 2018
I thought it might be useful and require fewer clamps for certain applications. Hoping it will keep panels flat when clamped.
Charles L on May 26, 2018
I purchased them because they were on sale.
David M on May 26, 2018
I need them
Edward M on May 26, 2018
Have 3, needed 2 more to do a long door
Geoffrey B on May 26, 2018
Great for clamping veneer
Lawrence B on May 26, 2018
I've always had problems with large tops bowing under side pressure, and it's clumsy adding other clamps to keep the piece flat. Hopefully, these clamps will end the problem.
James K on May 26, 2018
Perfect set of clamps for glue-ups, cuttings boards, etc...
Anthony C on May 26, 2018
For gluing up table tops
marty s on May 25, 2018
Always wanted to try.
Daryl E on May 25, 2018
Takes less clamping time the using c-clamp grips
Charles W B on May 25, 2018
Gluing up panels for boxes. I have a bunch of 5" cedar boards to make bee boxes, blanket boxes and chairs.
Kirk W on Mar 29, 2018
to make a desk top
Robert B L on Dec 24, 2017
Building a table top
Mike C on Dec 23, 2017
I had this type of clamps until all my shop tools were stolen
George F on Dec 23, 2017
TO GET FLAT GLUED UP PANELS.
Bruce D on Dec 23, 2017
Looks like what I need to make cutting boards
charles r on Dec 23, 2017
something new to try
Rolland V on Dec 23, 2017
I bought a set of these about a month ago and they work great
Smokey on Dec 23, 2017
1 is for replacement of a clamp that I twisted off the handle. the other 4 are for a second set of longer boards I made to clamp larger panels.
James C on Dec 15, 2017
It's a Christmas gift my dad asked for.
Pete B on Dec 5, 2017
gift
Karen M on Dec 4, 2017
request for gift
Stacie B on Nov 27, 2017
I have 2 Shopsmith double bar clamps that hard to come by and work great. Need 4 clamps to glue up long stock.
Paul B on Nov 27, 2017
I make a lot of table tops and it provides me with the best clamping pressure on all sides.
Benjamin W on Aug 13, 2017
gift request
Judy F on Jun 11, 2017
I'm building a hollow wood stand up paddleboard. These clamps will be perfect for gluing up the top and bottom decks. The best part is that these clamps can be any size (within reason) I choose.
Mark on May 17, 2017
Building several tables. Like the idea of four-way pressure. Hope they work as advertised!
Dan T on May 12, 2017
Making a table top.
Craig B on May 12, 2017
we do a lot of glued panels. Want to try this system
James M on May 8, 2017
I have a project that I think this will work great
Cj J on May 8, 2017
Do a lot of boards and tabletops, want to stop using dowels and biscuits, too time consuming and do not add strength anyway.
PEDRO F on May 7, 2017
I have been wanting to buy these for some time. When they went on sale, I jumped at the opportunity.
Robin S on May 6, 2017
I've had the need in the past to make cauls for gluing large pieces...these clamps appear to apply moderate equal pressure, with much less fuss for gluing
Herold K on May 6, 2017
Looks like it might work. Thought I'd take a chance on it working well.
Bradley N on May 6, 2017
saw the video and wanted to try them
Steve R on May 6, 2017
Rockler quality. I have begun gluing up mor panels.
Raymond D on May 31, 2018
I used to have a set very much like these, apparently someone needed them more than I did, so I had to get another set
Matt D on May 30, 2018
Im building a tabletop thats 3 x 4 salvaged lumber. Will these fit? Also, the table will be about 8 ft x 5ft, how many clamps would you recommend?
Sam S on Apr 5, 2016
How thick of material can these clamps accept?
Bobs5050 on Aug 3, 2015
BEST ANSWER: I've only clamped up 3/4 stock with them, they work ok.
If I order one of these, do I get a clamp for each end?
Fred J on Nov 25, 2016
BEST ANSWER: Yup, one end has the crank and the other has a passive spring clamp.
How much pressure does the 4way pressure clamp exert on all sides?
Adam H on Nov 25, 2016
BEST ANSWER: It exerts enough pressure to squeeze the glued joints together while keeping the boards even. Wipe the joints after clamping and there is very little clean up and leveling of surface to be done when dry.
Do these exert any downward pressure as well as edge pressure? Could they be used to edge glue and thickness laminate at the same time? What about if you mill a slight crown into the clamping board? Do the clamps draw down on the end of the clamping board when you tighten them?
Dewesq55 on Nov 26, 2017
BEST ANSWER: I use these clamps when I need pressure from the sides and across the top of the boards being glued. They provide both. Of course, the boards you make as the “clamps” must be flat or have a little bow so they they will be drawn down flat when clamped.
How thin can these work? I am trying to make a panel 33"X 1/4
Jack_7e S on Mar 25, 2017
BEST ANSWER: We used these clamps on 3/4" material and they work very well. I would think 1/4" material would work fine - just plan your work.
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