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nylon as gear material

nylon as gear material

nylon as gear material


We are manufacturers of gear head lathe machine of upto 1.5m as admit between centre (heavy duty lathes)

Can nylon or acetal or othe plastic material be used for making gears.

Let's have an example : Motor shaft of 1.5Hp power has gear of 4" dia of 1.5 module running at 1200 rpm. Will this gear will run smoothly with other gear of same module and no. of teeth (how much wear will be there, on teeth profile or in the bore of gear)



RE: nylon as gear material

Employing nylon in gears in this way is advantageous in reducing the noise and gear-rattle experienced in such machines. The rolling action will not be affected.

Hope this helps.

Russell Tanner.
Portescap (UK) Ltd.

RE: nylon as gear material

My personal observation has been that nylon-type materials are often used as gear material for low-load applications, such as clocks and RC vehicles.

Wouldn't nylon under high loads deform?


RE: nylon as gear material

The amount the bore wears depend on how it is located/driven. If the gear was rotating on a static lay-shaft, employing the gear material (nylon) as the bearing then almost certainly bore would wear. This would only be used for very-light load applications only, due the wearing of the bore.

If the gear driven by a keyed member or rotating on a static shaft with sleeve or ball-bearing, in the bore of the gear. There would be no wear in this case. The loading would be slightly higher than that of the previous method.

Russell Tanner
Portescap (UK) Ltd

RE: nylon as gear material

Many lathes incorporate phenolic gears from the gearbox to the feed and lead screws.  It is quiet running and very durable, however, you may want to investigate further before using on prime mover.

RE: nylon as gear material

olympic_hopeful makes an interesting observation. Re-enforced phenolics and some other thermosets resist the combined affects of heat and load better than nylon or poly acetal because they don't creep under hot load. If your job only gets warm, creep won't be an issue.

RE: nylon as gear material

I think reinforced material like Ryertex
would be an excellent material.  

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