linear motion two nested hollow cylinders
linear motion two nested hollow cylinders
(OP)
Looking for advice on a project I am working on. I have two cylinders one with a 6" diameter and a second with a 5" diameter. I need a simple solution for nesting the two to create linear motion. Both ends are open on the first cylinder and one end is open on the second. Both Cylinders are about 8-10" long. I am using a rack and pinion setup to move the cylinders. both cylinders are smooth walled. The interior cylinder needs to move in a linear fashion with a load on of 10lbs/sqin. The exterior cylinder is permanently attached to a production frame. The deviation of the interior cylinder isn't critical.
Does anyone have any advice regarding the material buffering the two cylinders. I want this to be simple . I was looking for a bearing strip I could epoxy to the cylinder walls, but have been unable to locate anything close. Does anyone have any ideas?
Thanks
Ken
Does anyone have any advice regarding the material buffering the two cylinders. I want this to be simple . I was looking for a bearing strip I could epoxy to the cylinder walls, but have been unable to locate anything close. Does anyone have any ideas?
Thanks
Ken





RE: linear motion two nested hollow cylinders
http://www.mcmaster.com/
Don
Kansas City
RE: linear motion two nested hollow cylinders
I am quite familar with Teflon Tape. I guess I wasn't clear. The inside cylinder needs to be centered. Note the Difference in cylinder diameters.
thanks
Ken
RE: linear motion two nested hollow cylinders
Don
Kansas City
RE: linear motion two nested hollow cylinders
http://www.cshyde.com/tapecat.htm
RE: linear motion two nested hollow cylinders
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RE: linear motion two nested hollow cylinders
how often does it need to translate ? (service life)
what limitations on maintenance ? (would striping it down once a year be a problem ?)
how much overlap is left between the cyclinders at their maximum extension ?
RE: linear motion two nested hollow cylinders
Why do you need a guide at all if the inner cylinder is already guided by whatever is supporting your rack? Or are you looking for some type of crude piston seal?