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Pneumatic Pistons

N

NeBa

Limp Gawd
Joined
Nov 4, 2001
Messages
275
So I'm looking for 4 pneumatic pistons that can raise something 48 inches into the air. All 4 pistons will carry about 60 pounds together. Does anyone know where I can get these?
 
Originally posted by Gargoyle_Hunter
48 inches? That's pretty damn high... what kinda power are you going to be using?
Click to expand...

The speed doesn't matter but I'm pretty much restricted to the plug in the wall.
 
largest I found at McMaster-Carr

Part # 6498K472
Stainless Steel Air Cylinder Dbl-Acting, Pivot-Mount, 1-1/2" Bore, 28" Stroke
$ 99.35 Each
 
lmao on the actuator :)

I have to agree.. linear actuator all the way - many manufacturers.. Danaher is one company. They recently bought up a lot of motion companies.

You can get them with built-in end of travel switches and just about any power.

48" stroke pneumatic cylinders will tend to leak unless the rods are very well supported throughout their range of travel.
 
I'd go with electric linear actuators- it will be hard to maintain eqaual movement between 4 pneumatic (or hydraulic) actuators without expensive feedback hardware.
 
Yeah that seems like some great advice. So I am building a loft for my dorm room that will have the ability to raise and lower. Basically I would like it to be 8 foot from the floor while it's raised and 4 foot from the floor in the lowered position. I have already constructed the frame and tested it's travel. So what would be best for this task?
 
Have you seen those camp trailers that are like four feet tall when towing and the roof raises up four feet to use when camping. the risers for those should work, try a camper supply store and see what they have.

only thing I could think of:)
 
Originally posted by racercarl
Have you seen those camp trailers that are like four feet tall when towing and the roof raises up four feet to use when camping. the risers for those should work, try a camper supply store and see what they have.

only thing I could think of:)
Click to expand...

wow, great idea.
 
Unless your stuck on using air forget about air cylinders. That Tol-e-matic rodless cylinder uses cheap rubber seals which will leak over time.

Look for designs similar to this...

Linear%20actuator3.jpg


Very rugged if you can get the stroke.
 
How do you implement a linear actuator? They look like you could use them in lots of stuff, but I just ain't seeing how you make stuff move with em...
 
If you wanted to go hardcore and fabricate something then you could do this with four threaded rods and some heavy duty gearmotors. Put a threaded rod in each corner of the loft and attach the motors to them. Then attach a plate with a threaded hole at each corner of the loft. There is a lot more involved in actually making it safe and stuff but that's a basic idea. I can't think of much else that would work except for the linear actuators.
 
I would consider something a bit more back to basics. Perhaps using a rope and pulley system. That would be cheaper and easier to install. Use a winch and you're all set. Plus you wouldn't be limited to any height.
 
What you could do is get hydralic mast cylinders from forklifts (these usually have a 48+" stroke). Or get shorter pneumatic cylinders and make up a rig like a forklift mast with chains and pulleys. That would be able to lift ALOT of weight and you'd get your 48" of lift without a 48" cylinder.
 
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