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View Full Version : Source for J-Belt Step pulleys/sheaves.


Nick Hoffman
10-19-2009, 9:37 AM
I am looking for a good source for J-Belt step pulleys/sheaves. Any one know a good place, I need these for a lathe I am building, I am trying to get sizes for my 3 speed ranges.
harry strasil
10-19-2009, 10:04 AM
any good hardware store, or parts store. Mcmaster Carr, etc.
Nick Hoffman
10-19-2009, 11:15 AM
Actually they do not have j-belt step pulleys, I have looked at Mcmastercarr, grainger, MSC, ect. I am beginning to think I will have to get them made up.
Anthony Whitesell
10-19-2009, 1:12 PM
Two questions:

1. J-belt opposed to V-belt, what's the difference?

2. did you check surpluscenter.com?
Nick Hoffman
10-19-2009, 1:25 PM
http://www.mcmaster.com/catalog/115/gfx/small/9003kc1s.gifJ-Belt is like multi v-belts "wider and flatter", I want 10 grove which is roughly 1" wide actually smaller but close. V-belts are easy to come by. I have found some metric v-Belt step pulleys that might work but I am not happy with the ratios, I may just have to compromise, or have the J-belt's turned in aluminum.
http://ametric.com/
Joe Jensen
10-19-2009, 2:14 PM
Is a J-belt the same or different than a "Poly V Belt". When I bought one for my compressor they called it a Poly V Belt.
Nick Hoffman
10-19-2009, 2:46 PM
looks like they might be the same.
Nick Hoffman
10-19-2009, 3:09 PM
On this site I found the truth:
Poly V - is a registered trademark of Goodyear Tire & Rubber Company
Micro V - is a registered trademark of Gates Rubber Company

http://www.torquetrans.com/pulleys/multi-v-pulleys/images/polyvpro.gif

http://www.torquetrans.com/pulleys/multi-v-pulleys/multi-v-pulleys.htm
harry strasil
10-19-2009, 4:37 PM
Probably end up buying 6 pulleys, 2 of each specific size to get the ratios you want and just putting 3 of each size on the shafts, or going with a Variable speed gearbox.

If you are going for non slippage you might consider cogged flat belts, I have used them on several machines I made for others. And that is what I used on the 3 Septic tank pumper trucks I built because V belts would have put too much side pressure on the input shaft of the milking machine vacum pumps I used that were PTO driven from the truck transmission.