Clamps

[Spectric]

Just wondering what peoples views are on the two main types of clamps used on worktops with 20mm holes and what you use.

You have these screw types amongst many other brands

or these lever types from Bessey, Festool and Makita as well as some lesser know brands from the far east. I think most have a 60mm reach but the Bessey comes in many more variants.

 

[ChaiLatte]

How is a 20mm hole workbench made?

Specifically, is the underside of the holes chamfered or relieved?

On all the clamps you show, the tangent point of the radius on the upper surface to the back of the vertical clamp pillar would need to be less than 20mm to work in a square-edged hole.

I have just measured my standard Makita tracksaw (screw, not lever) clamp and on that the measurement is 25mm so that would not work in a 20mm unrelieved hole. The same measurement on a standard Festool tracksaw screw clamp is 20mm.

Hence, it would be wise to confirm that dimension on any prospective purchase or have a plan if it exceeds 20mm.

 

[Spectric]

That is an interesting point, the Microjig clamps are ok as I have used them but not looked at my Makita tracksaw ones.

 

[Sideways]

I have a half dozen of the lower type - ratchet lever.
They are Axminster brand blue or red, modelled after the bessey version.
They work fine in a 20mm dog hole and in a festool track. At half the price of the Festool ones, they were good value.

Personally, I don't have any clamps with the screw mechanism like your top row. I find this screwdriver action isn't as quick as a squeeze clamp and I don't have the grip to crank it up really tight. Smooth wooden handled screw clamps are the worst of the lot.
I do have both Piher and Axminster long clamps with screw handles but all of those include a hinge so the handle can be bent over 90 degrees for extra leverage.

 

[AJB Temple]

I have both types. Mafell and Bessey in my case. The Mafell ones are screw handle and the Bessey are the lever clamp type and I hate them!

I find with the lever clamps that I often can't get them quite as tight as I would like, and sometimes they are difficult to release as well. Unfortunately I have quite a few small Bessey clamps of this type It may just be me being cack handed. Some of the rotary handle versions also have a handle that can be folded over to get more leverage. I have a few like that and it can be useful either where you need to really squeeze or where its a very tight spot.

 

[Spectric]

I find with the lever clamps that I often can't get them quite as tight as I would like

That reminded me that for ages I used Irwin clamps as they were half price at a show and thought a lever has to exert more force by it's very definition. Then I brought some Bessey parallel clamps with the screw type handles and found they actually exerted far more force and it was easier to close joints with them.

 

[Doug B]

These have become my go to clamps for the last couple of years when work holding on the bench https://www.besseytools.co.uk/besse...lement-for-multifunction-tables-2-pack-tw-kli

They just push into a 20mm hole & the force they exert when pulling the lever is excellent

I did turn some steel extension pieces that screw on the bottom socket to give them more purchase on my beech workbench, but I believe Bessey offer something similar.

 

[Spectric]

I have a half dozen of the lower type - ratchet lever.
They are Axminster brand blue or red, modelled after the bessey version.

Well on your recommendation I have just purchased some of these from Axminster, yes a lot better priced than the others.

They just push into a 20mm hole & the force they exert when pulling the lever is excellent

I have looked at these types that fit into the hole but having used those Bessey Horizontal clamps I found they can deform the 20mm hole. Maybe the solution here is to use the ones that have a fixing underneath.

 

[Windows]

I use the ratchet clamps (specifically the Festool ones) for clamping. Only occasionally for clamping through the holes (usually clamp from the edges where possible), but it’s nice to have the option. Much prefer them to the screw type clamps when the size of the objects being clamped changes often.

 

[Sachakins]

Well on your recommendation I have just purchased some of these from Axminster, yes a lot better priced than the others.


I have looked at these types that fit into the hole but having used those Bessey Horizontal clamps I found they can deform the 20mm hole. Maybe the solution here is to use the ones that have a fixing underneath.

Sometimes you get this happening when there is no chamfer on bottom of the dog hole.

 

[HOJ]

My preferred option is the screw type clamp, I've had the ratchet ones ping off in mid flow and been nipped by them more than a few times when releasing them.

 

[Doug71]

I have the Festool ratchet version and find them okay, the only thing that annoys me is that they look like you should be able to use them one handed but you can't (well you can but it's not easy).

 

[Windows]

I have the Festool ratchet version and find them okay, the only thing that annoys me is that they look like you should be able to use them one handed but you can't (well you can but it's not easy).

Yes! I find this to be true. I found them annoying until I submitted to reality and just always use both hands now to clamp (unclamping one handed is usually no problem).

 

[Spectric]

Some feedback on these Axminster clamps I purchased, 200 by 100 . Well firstly you do get a lot of metal for your money as they are quiet heavy and there is no way you could use them one handed as @Doug71 has already said, but then in there support they are not sold as a one handed clamp but even with two hands they are a pita to get it to do any decent clamping. Compared to the Bessey one handed clamps which are also lighter there is no comparison, they out perform these axminster clamps in every way and you get the bonus of one handed use and they just clamp without any thought needed as well as easy to release where with the axminster clamp you need to exert pressure on the lever to release.

So again we see that you only get what you pay for, these were £28 each and the bessey version would be £46 each but looks like Bessey is the way to go for clamps.

 

[Sideways]

Sorry to hear you're disappointed with these Roy as I spoke up for them.
I do agree that they're a two handed clamp. I cant think of any way that any of the six in your first photo are single handed use upside down and dropped through a dog hole.
They don't even work well single handed when they are slotted in a guide rail and you have that to push up against.

If you're also comparing them against bessey one handers, which can't feed through a dog hole, they're a very different animal.

This prompted me to look back as I was sure when I bought mine 10 years back, that the bessey equivalent was virtually identical. They were so similar that the view was that they came from the same factory.

On releasing a squeeze or ratchet clamp, pretty well all of these work better if you squeeze the grip to unload the lock before pulling the release trigger. The higher power bessey and irwin clamps and the cheap lidl ones all included. I reckon it reduces wear on the latch so this is worth doing as a habit whenever a clamp is cranked tight.

https://www.ukworkshop.co.uk/threads/axminster-ratchet-lever-guide-rail-clamps.71556/
https://www.ukworkshop.co.uk/threads/mft-clamps.125984/

https://www.festoolownersgroup.com/...94-vs-bessey-gtr16s6h-quick-ratcheting-clamp/

https://www.ukworkshop.co.uk/threads/guide-rail-clamps.138580/

If you like bessey and want a single hander but not for 20mm holes, have you seen these beasts ? !

Four locking plates inside and a metal release lever because you have to apply a fair bit of force if you don't unload the lock first.

 

[Spectric]

This type are amazing, simple flick of the red knob and released .

 

[Spectric]

@Sideways I wonder if those Axminster clamps you brought were a while back and maybe from a different manufacturer / Axminster supplier, the current ones are now different.

 

[Spectric]

A new lever clamp in the market that I had not seen before from Microjig and sold by Woodworkers workshop.

and a video which shows they have a little spring to hold the clamp where you left it rather than it just fully opening.

 

[Jake]

This type are amazing, simple flick of the red knob and released .

View attachment 192393

These are better than the duo klamp.

https://www.besseytools.co.uk/besse...amps/bessey-one-handed-clamp-ehz60-2k-600-100

 

[Stigmorgan]

Yandles are having a huge 80% discount on Triton clamps for the black Friday sale, definitely worth checking out.
https://www.yandles.co.uk/?s=triton...166120926&mc_cid=2a78215403&mc_eid=ff02f2695a