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Diy Pneumatic table saw clamps/Holddown

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Forum topic by mark4345 posted 519 days ago 2845 views 0 times favorited 7 replies Add to Favorites Watch
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mark4345

55 posts in 1056 days


519 days ago

Spent the day working on a better way to hold down my workpieces to the slider. Ive grown tired of constantly fiddling with the standard hold down toggle clamp. I ran across the pneumatic clamps felder sells but at $870 each i cannot justify that for a clamp.

I bought 2 spring return air cylinders, then went to lowes and raided the plumbing isle and heres what i came up with…

!

https://s3.amazonaws.com/lumberjocks.com/mkcv4a5.jpg!

All in all really easy to do, aside from the air cylinders they are all parts from the hardware store.


7 replies so far

View Loren's profile (online now)

Loren

7439 posts in 2281 days


#1 posted 519 days ago

That’ll do. Good idea.

Bessey makes some manual clamps which adjust automatically
for variations in material thickness… range is 3/8” or something.

... of course pneumatics are more fun to fiddle with.

-- http://lawoodworking.com

View Picklehead's profile

Picklehead

568 posts in 563 days


#2 posted 519 days ago

YOU CAN’T DO THAT! Awesome.

-- You've got to be smarter than the tree.

View Kaleb the Swede's profile

Kaleb the Swede

1109 posts in 603 days


#3 posted 519 days ago

One valve, instant hold down with really strong results. I have messed with air rams (on a touch larger scale) on the commercial fishing vessel I worked on for a time. Really smart idea you have there.

-- Just trying to build something beautiful

View FirehouseWoodworking's profile

FirehouseWoodworking

622 posts in 1907 days


#4 posted 519 days ago

Very cool idea, Mark. Well done! Where do you get the cylinders and roughly how much do they run?

-- Dave; Lansing, Kansas

View Loren's profile (online now)

Loren

7439 posts in 2281 days


#5 posted 519 days ago

You can buy all sorts of bargain cylinders on ebay. A lot of
it is new old stock and in small lots.

Not cylinder clamping, but check out the vacuum clamping
rig I made for ripping crazy tapers on my slider.
http://lumberjocks.com/Loren/blog/34255

-- http://lawoodworking.com

View mark4345's profile

mark4345

55 posts in 1056 days


#6 posted 519 days ago

As loren said, there are lots of them available on ebay. The ones i used are 1 1/16” bore with a 3” stroke. On ebay they can be had for $15-30. Grainger also has a large selection though they are more expensive $25+

That is a pretty slick vacuum clamping rig you got there, that is something i have been thinking about i just haven’t had the need nor the project to use it on yet. I am currently working on building a cnc machine, once that is done (who knows when, i have a lot im working on now) i will be taking a closer look at vacuum clamp options.

View Ocelot's profile

Ocelot

529 posts in 1272 days


#7 posted 127 days ago

I just did a search on pneumatic clamps and found your thread.

i was wondering if anybody did shop-made pneumatic vises or bench clamps. i gather that such things are widely used in industry.

How is your clamp / holddown working out for you after a year in service?

-Paul

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