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kamarulnidzam
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Join Date: Jul 2012
Posts: 3

Pneumatic Cylinder

07/24/2012 4:00 AM

I have a double acting cylinder with 2 hole that have set screw and 1 ring that stopping the set screw from came out, this hole located beside inlet air supply and currently air leak from this hole,what is the function of this set screw? How to remove stopper ring without damage and do i need fully tighten the set screw? If i fully tighten the set screw it will stop the air leak and what is the defect by doing this? TQ
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PWSlack
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#1

Re: Pneumatic cylinder

07/24/2012 4:02 AM

Without knowing the make and part number of the cylinder, one guess would be that it is a speed regulating device. Adjusting the screw may well change the dimensions of the aperture through which air flows out of the cylinder, thereby altering the speed of passage of the piston within it.

Other guesses are equally valid.

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kamarulnidzam
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#2
In reply to #1

Re: Pneumatic cylinder

07/24/2012 4:16 AM

The manufacturer is Hoerbiger
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jesw55
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#3
In reply to #2

Re: Pneumatic cylinder

07/24/2012 5:32 AM

Hi kamaruindzam,

It sounds like the end of stroke cushion adjustment screw. If you screw it all the way in the cylinder will not fully stroke. If the screw is retained by a star type washer, just ease it out with a small screwdriver then remove the screw. Fit a new "O" Ring, put some grease on it and re-fit. MAKE SURE THE AIR IS OFF AND THERE IS NO PRESSURE IN THE CYLINDER.

Best regards,

John

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kamarulnidzam
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#6
In reply to #3

Re: Pneumatic cylinder

07/25/2012 5:12 AM

The retaining washer is rounded type 10 mm diameter X 15 mm depth and i have dificullities to remove it out.It keep on turning when i try to remove by extractor and will damge if i use a screwdriver.Any idea..
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jesw55
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#8
In reply to #6

Re: Pneumatic cylinder

07/25/2012 5:31 AM

Hi again,

Do you have a part number for the cylinder, they have several types and the cushion screw retainers vary. Are you sure of the dimensions of the retainer? 15mm Deep seems a lot.

I have a Hoerbiger catalogue on my desk but it gives very little detail as to the construction of the cylinder. With the part number I can contact Hoerbiger and request detailed information for you.

Best regards,

John

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Bazzer Englander
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#7
In reply to #3

Re: Pneumatic cylinder

07/25/2012 5:14 AM

You've Got it!

Bazzer

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lyn
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#5
In reply to #2

Re: Pneumatic cylinder

07/24/2012 3:41 PM

Wouldn't the intelligent thing to do be contact the Hoerbiger people (web site) and look at a drawing of the cylinder. Read the instruction manual!
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ozzb
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#4

Re: Pneumatic cylinder

07/24/2012 7:54 AM

As jesw55 has said they are cushion adjustment screw to slow the swab down at the end of it's stroke. Keep the swab from slapping the end. The retainer is to insure during adjustment the screw isn't backed out all the way the air would make it a projectile. It's small and you have to some time be right on top of it to see it. Pry the retainer out remove the screw replace the o ring seal. If damaged a replacement retainer can be acquired.

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Captkirkconnell
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#9

Re: Pneumatic Cylinder

07/25/2012 8:16 AM

That be a varible restriction (resistance) for some reacting task. It could control speed of the return stroke.

They could also be some way to control a return signal that can feed into some logic controller.

They could control the dampping at the end of the stroke.

can you play with it? I mean make some adjustments to that screw while the device is working? good luck.
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Users who posted comments:

Bazzer Englander (1); Captkirkconnell (1); jesw55 (2); kamarulnidzam (2); lyn (1); ozzb (1); PWSlack (1)

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