T-track cam clamps? - Woodworking Talk - Woodworkers Forum
 
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post #1 of 7 Old 04-16-2014, 06:07 PM Thread Starter
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T-track cam clamps?

Anyone have a drawing or picture? I would like to make a set of cam clamps to hold material down on our new CNC router. I would use 1/4" bolts of varying lengths that would slide into the T-tracks. The cam part I would make out of wood, but I have no idea what shape to make them.

Anybody have suggestions?

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post #2 of 7 Old 04-16-2014, 06:46 PM
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Originally Posted by Jim Beam View Post
Anyone have a drawing or picture? I would like to make a set of cam clamps to hold material down on our new CNC router. I would use 1/4" bolts of varying lengths that would slide into the T-tracks. The cam part I would make out of wood, but I have no idea what shape to make them.

Anybody have suggestions?
Here is the best I can do on short notice. Kind of a small picture but here is a link to Rockler that can give you a better look.
http://www.rockler.com/cam-clamp
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post #3 of 7 Old 04-16-2014, 09:24 PM
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Lee Valley also sell these, I have several, although not used so far.

http://www.leevalley.com/US/hardware...76,61994,45034
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post #4 of 7 Old 04-16-2014, 09:43 PM
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Quote:
Originally Posted by Jim Beam View Post
Anyone have a drawing or picture? I would like to make a set of cam clamps to hold material down on our new CNC router. I would use 1/4" bolts of varying lengths that would slide into the T-tracks. The cam part I would make out of wood, but I have no idea what shape to make them.

Anybody have suggestions?
Jim,

I would say scroll down this page and click on any picture you like

https://www.google.com/search?q=hold...ml%3B480%3B360

A friend, that has a cnc, uses nylon bolts and nuts and a wooden hold down clamp. That way, if the cnc gets squirrely you won't break a bit...
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post #5 of 7 Old 04-16-2014, 10:25 PM
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Just another comment on cam clamps. I use them on the split fence of my router table and they work great in that application. However, adjusting them for stock thickness can be a PIA hence, for most stock clamping applications I prefer the hold downs.
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John

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post #6 of 7 Old 04-17-2014, 10:06 AM Thread Starter
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Thanks to all for your suggestions. I have seen the Rockler clamps, will probably get a few and see if I can copy them. They are great for top-down pressure, but could potential get hit by the router bit. Some of the pics showed a side-clamping method that I will try to copy also. If I come up with anything useful I'll post it here for the benefit of future forum-searchers.

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post #7 of 7 Old 04-18-2014, 10:04 AM
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The worst thing that can happen when routing or milling is to have the material being cut come loose, it can ruin your day. Go with good sturdy hold-downs, just don't put them in harms way.

Wise men speak because they have something to say; fools because they have to say something -Plato

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