Saturday, June 24, 2017

What Type of Fastener?

My very nice leather office chair has a failed hydraulic cylinder so it won't stay up.  Theoretically, you can replace the hydraulic cylinder.  I bought one and discovered that my chair was enough different that I could not use it.  The other approach is to put a tube around the column of the chair that prevents it from dropping: a 4" ID by 12" long by 1/4" wall tube should do it.  It has to go on from the sides, so slice it into two half cylinders.  But what fastener to hold the two half cylinders together?  Airplane clamps have to go on over the top, I believe.  Any other ideas?  Maybe a C clamp with round jaws?

Split ring clamp is the magic word.

11 comments:

Minicapt said...

Not hose clamp?
http://www.homedepot.com/p/Everbilt-1-2-1-1-4-in-Hose-Repair-Clamp-6712595/202309385

Cheers

B said...

Wire ties.

Arthur said...

https://www.google.com/search?q=screw+clamp&oq=screw+c&aqs=chrome.4.69i57j0l5.11326j0j7&sourceid=chrome&ie=UTF-8

Use a screw clamp like this one. You can take the slotted part out of the screw to go around the pipe, and then fasten it again through the hole to complete the screw system.

agh, I don't have the right vacubulary, but I think if you look at it you will see.

Clayton Cramer said...

Minicapt: Does a hose clamp come completely out to wrap around an object without going over the end?

James Gibson said...

The worm gear style of hose clamp should allow you to open it completely so you can install it without having to go over the end. You may have to remove the tip end of the band, it may have a crimp to prevent the band from going back through the worm gear.

Will said...

Hose clamps are strong enough for that application. Use several.

Yes, you can unscrew them to get the end of the strap free to do a wrap. Measure the diameter you will need, and buy them to just meet this size. No need to have excess tail sticking out to catch your pants, etc. Consider covering the clamps after tightening.

BTW, amazon sells replacement struts for those chairs. Some are from the chair maker.

You can use ty-wraps, but it is difficult to get them properly tensioned without the correct tool. This cutter stretches the end, so when cut it retracts into the body. Just cutting it leaves a sharp end hanging out, like a blade. Not good.

Windy Wilson said...

Hose clamps open up to go on from the side.

Dorsai said...

Not Minicapt, but most will. Takes a bit of jiggling and fussing, sometimes.

T macWeave said...

hose clamp works great also good for air horn alarm when a large person over stresses chair.

Minicapt said...

Yes, I've done that on occasion. Just confirm that the slots/teeth to be engaged by the screw continue to the end of the tab.

Cheers

Jim Horn said...

Yes, I use hose clamps all the time. Just unscrew it, wrap it around and rescrew it until tight.