Thread: Pulley sizes vs RPM?????

Thanks to all of you for your input. Please see my new thread, "ITs DONE!
Skew, Gil, Ian, Mick. All good ideas, and I've saved and printed them for later use.

John, tas, harry, TTIT, Joash. Appreciate your posts! Especially the hamster idea.

hi,
i m working on a project to make a generator to produce 10 KVA
the driving shaft speed is 300 rpm and the driven shaft speed is 1500 rpm. so that ration is 1:5
now, i need to buy pulley for the driver and driven shaft.
i need to find out the size for both pulley with the given data..

can i find some help in that ??

will highly appreciate your help in it.;

thanks.

By my calculations you need a 120mm pulley on the driven shaft and a 600mm pulley on the driver.

They will have to be at least triple or 4 row pulleys with matched belts.

The driver speed doesn't seem right to me. What size motor are you using?

One problem with the proposed ideas, is that for 3 pulley sets (ie. 3 belts) you need 4 shafts, and tensioning the belts can become a nightmare. Adjusting one throws others out, etc. unless you start at the "fixed" end (usually the chuck) and work your way through. It also means that as you work towards the further shafts, they need larger and larger adjustment slots to take up the slack.

Al,

What I have done is to have middle shaft on a swing arm.So as you apply tension to the last or motor pulley you also tension the middle and headstock belts to boot.

http://www.csgnetwork.com/pulleybeltcalc.html

just put an approx belt length its happy with most any length you use.