George Vondriska

You Should Know About Lever Clamps

George Vondriska
Duration:   4  mins

Description

You may have a boat load of clamps in your shop that have screw threads. As you spin a handle the threads turn and tighten or loosen the clamp. Lever clamps are completely different. They have more of a gear/ratchet/cam system. As you move the lever an offset cam puts pressure on the clamp head, which in turn puts pressure on your work. The ratchet system locks the cam in place until you release the clamp.

Easy to apply pressure

One of the benefits of lever clamps is that they make it VERY easy to apply pressure. If you have any hand issues that make it difficult to spin the handles on conventional clamps, lever clamps may be a great clamping solution for you. Pulling the lever to apply pressure and hitting the release to let go of pressure is very simple.

One handed

Thanks to the way the lever clamps work, it’s easy to use them one handed. Slide the head toward your work, then manipulate the lever to apply tension. This is great for scenarios where you need to hold your work with one hand and clamp it with the other.

Hold down for your workbench

One of my favorite applications of a lever clamp is as a bench hold down. Slip it onto a dog hole in your bench, slide your work under the clamp, and apply clamp pressure. What a convenient and easy way to hold your work in place.

Bessey, of course, makes many different styles of clamps. This video will help you select which clamp is best for the task and hand.

More info

For more info on Bessey Clamps visit the company’s website or call (800) 828-1004.

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One Response to “You Should Know About Lever Clamps”

  1. Jay

    Great video! I can see using these as faster than C-clamps with potentially more clamping force than F-clamps. And then there's ratcheting bar clamps. I have only one of those and it leaves marks on the wood that the padded F-clamps don't. I don't have a lot of confidence in them. For ultimate joining, I rely on 3/4" pipe clamps, but they have their limitations, too. My current project is making curved chair backs from ash hardwood. It requires steaming the work piece and bending it between cauls before it cools down or it will crack. I failed 4 times using sapele and almost completed it with the ash. I've been using pipe clamps but it's clumsy at best. The clamping range is only about 3-4 inches and then you have to apply a 2nd set of clamps, loosen the first as the 2nd set starts working, and going back and forth with those. It takes quite a while and it's quite awkward. There's gotta be a better way. Ratcheting clamps might be the answer if they can generate enough force. The bent piece is 29" long, 2 & 3/4" wide and 5/8" thick, bent to a chord-length of 24 inches within a circle whose radius is about 15.8", the final amount of central deflection desired being 5.5".

I have been doing woodworking for a really long time, and I have seen a huge variety of clamps come across my workbench. And recently, I'm loving the levers. Lever clamps are relatively new to me, and they offer a lot of advantages, and they're really finding a great home here in my shop. So I wanna tell you about 'em so that you're also aware of them, and see how they can fit into your woodworking too. So let's back the truck up a little bit. Parallel-jaw clamps, F-style clamps. What these have in common is the manner in which we tighten. We've got a threaded mechanism, we turn the handle, righty-tighty, lefty-loosey, and that's how we apply pressure. So the difference when we get to lever clamps is, this is the lever. This is where our pressure is gonna come from. So it's a little bit, kinda think of a ratchet strap-type approach. As I pull this up, and it clicks through those gears, that's what's applying tension down here. So when we're clamping, just let it rest. And that's what's locking that in place. So a couple things are cool about this. One, I don't have much trouble with my hands. In other words, I'm not suffering from carpal tunnel or anything like that, but if you're in a scenario where twisting is difficult for your hand or your wrist or your arm, look at the pressure that we're getting here outta that lever clamp, by simply doing that. And of course, the more clicks I do, the more pressure I'm putting on that lever clamp. So obviously that's a significant bite. That head on the end floats. So, it has the ability to adjust depending on how you're clamping it, adjust to parallel or not to the other face, depending on what you're doing with it. So, it's important to know when you're looking at these, that there's a lot of different stuff going on here. Heavier-duty lever clamps, like I was just showing you. Lighter-weight stuff here. The other thing that's nice about this is in an application where, we need to hold, approach with a clamp, and then squeeze. So, one-handed operation here. Again, I'm holding the material, coming in with the clamp, little bit of pressure there. And then the lever does the rest. So it gives you a nice one-handed option to get that tension on, and plenty of tension for what we're trying to do. One of my favorite applications for this is a lever clamp where, it dogs into this 3/4 inch hole that I have in my workbench. And then when I wanna secure stuff to the benchtop, similar to what I showed you earlier, we can apply pressure. And again, we're just following those cogs. And as it clicks through, that's what's getting tension and pressure on that. So it's something where, one of the things I really like doing is finding different tools, of course, 'cause I'm a bit of a tool junkie. And the other thing is, I really enjoy the opportunity to show you what those tools are about and increase your awareness so that you can find, like I said earlier, where they fit into your woodworking, where they fit into your shop, and don't limit these lever clamps to woodworking. I do a fair bit of welding, and I have found these are also a great tool for me to have in my welding applications for all of the reasons that we talked about here. So again, explore that whole lever clamp category, and I think you're gonna find 'em just as useful in your shop as I have in mine.
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