Woodworking & Power Tools Forum - Festool Owners Group > FESTOOL DISCUSSIONS > Festool Tools & Accessories > Best way to prevent lifting with the clamping elements.
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Author Topic: Best way to prevent lifting with the clamping elements.  (Read 1293 times)
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Dovetail65

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« on: July 30, 2010, 03:20 PM »
How do you prevent lifting with the clamping elements?

I am NOT talking about the clamp lifting out at all(I have seen some threads on that)mine are rock solid.

I am asking how to prevent the actual material from lifting which sometimes it does depending on how far the arm is from the actual item clamped(even with the clamps super tight and all the way down).

I believe it is more to do with length of the arm, I try to keep that as short as possible, but in some instances I just can't.

Again, my clamps are all the way in the hole and very tight, still the material can and does occasionally lift.
« Last Edit: July 30, 2010, 03:25 PM by nickao » Logged
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Wim

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« Reply #1 on: July 30, 2010, 03:41 PM »
I noticed the same. To me it is a matter of direction of forces. If the plastic head of the clamp is not pushing the wood over the full height, from the table surface up, there will be an upward force that may lift the wood. If you lift the part with the handle a few millimeter at the peg side above the table surface, but the head against the table, you will create a downward force. But be careful, you will also create a bending force in the round peg. It worked for me.

I hope I could explain it clearly.
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JJ Wavra

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« Reply #2 on: July 30, 2010, 06:25 PM »
I leave a little room then pull the lever and it has worked well for me.  I should clarify maybe room is not the right term but I don't snug the clamps then pull the lever the piece being clamped can still move around a bit then I pull the lever allowing the slight travel in the clamp to create the pressure.  I hope that makes sense.
Jeff
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Peter Halle
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« Reply #3 on: July 30, 2010, 06:47 PM »
One of the things we learned the other week in training classes was that the pressure exerted by the clamping elements is adjustable.  There is a hex head bolt - I think 2.5 mm on the rear side of the clamping element that can be adjusted to provide more or less pressure once the clamp handle is activated.  I believe that it is reverse threaded.  Try that and it might help with the lifting issue.

Peter
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« Reply #4 on: July 31, 2010, 11:54 AM »
Quote from: Peter Halle on July 30, 2010, 06:47 PM
One of the things we learned the other week in training classes was that the pressure exerted by the clamping elements is adjustable.  There is a hex head bolt - I think 2.5 mm on the rear side of the clamping element that can be adjusted to provide more or less pressure once the clamp handle is activated.  I believe that it is reverse threaded.  Try that and it might help with the lifting issue.

Peter
Awesome tip Peter.
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