timing pulley cutter

Models and whatever wheels.

Gonna have to grind it by hand on a grinder wheel, plus you will need some type of gauge to compare. Haven't done it in awhile but its like riding a bike.

John

What can you tell me about its geometry ?

John

Depends on the profile of the belt that goes on the pulley....there are as many different profiles as there are belt companies. They are semi-standard but every once in a while the profile goes way off the beaten path.

If it's not all that critical, you can fudge using a tapered endmill. If it is truly a timing pulley, you gotta be darned accurate about proper engagement of the belt and pulley surface. Tends to be cheaper to buy either finished pulleys or rod stock with the profile allready milled to cut to length unless you are going into production mode. Since you are asking the question, I assume you are making onsies and twosies.

Guys,

it has a trapezoidal tooth profile. I just need to make a few for now, its a custom gear with internal bearing races. so a stock pulley won't work.

Thanks.

I had to make a few specials. I used a devlieg boring head tool like a flycutter:

using the optical comparator, I ground the insert to make exactly one pocket of the timing pulley. Machinery handbook gave specs. on shape. Put shaft in fourth axis, make cut, index, etc. Very fast.

Thomas, Just buy extruded profile from somebody like Stock Drive Products and machine the bearing bores. Faster and cheaper by far I believe.

Gary H. Lucas