JPG wrote:I dare say the size of the drive sleeve and idler shaft pulleys are the same as the Mark 5/V pulleys.
That being so, I predict the motor pulley to be about 2 times the idler pulley.
The Mark V Idler Pulley is a variable sheave.
The Mark V Drive Sleeve Pulley is about 1 3/4" in diameter (crude measurement). Power Pro uses the same assembly.
The Power Pro Motor Pulley appears (on the web page) to be about twice that diameter. Therefore, for the moment I am assuming it to be about 3.5" in diameter.
That being the case, if the Striatech motor (PowerPro) is operating at/near its' advertised top speed, the Power Pro would be near top speed of10K rpm (2:1 ratio).
The reason for my quest: That would mean that the Idler Shaft is turning at/near 20K rpm. It is about 1/2 the size of the Drive Sleeve Pullet. That is very nearly the top speed rating for the bearings in the Mark V Idler Shaft Assy. No wonder there is some heat being generated.