Here's a Math Question for you.....

[Dull Knife]

I have an electric motor rated at 1075 rpms. I need to know what size pulley I need to boost rpms to 1300?? thankx

[pallin]

To answer this question, one needs to know the diameter of the motor pulley. The ratio between the pulley diameters will be the same as the ratio of 1075 to 1300.

[Claude]

Phil is correct. If your motor pulley is 4 inches in diameter then the driven pulley should be

4 x 1075/1300 = 3.3 inches. A 3 inch pulley might be easier to find and would turn at 1433 rpm

To save you doing the math, the closest you can get to 1300 rpm with pulleys measured in whole inches (2", 3", 4", etc.) is 1290 rpm. That would be using a motor pulley of 6 inch diameter, and a driven pulley of 5 inch diameter.

Hope this helps.
Claude

[Dull Knife]

Originally Posted by Claude

Phil is correct. If your motor pulley is 4 inches in diameter then the driven pulley should be

4 x 1075/1300 = 3.3 inches. A 3 inch pulley might be easier to find and would turn at 1433 rpm

To save you doing the math, the closest you can get to 1300 rpm with pulleys measured in whole inches (2", 3", 4", etc.) is 1290 rpm. That would be using a motor pulley of 6 inch diameter, and a driven pulley of 5 inch diameter.

Hope this helps.
Claude

Yes to both of you for your formulas....my math skills aren't very good, I need all the help I can get. thankx lots!

[Stan Curtis]

Gee whiz, Claude. You answered him while I was playing with the Math!!!!