Product Manual

-33-
Table 1: Recommended Sheave Diameters, Belt Type and Number of Belts
1200 rpm 1800 rpm 3600 rpm Min. Max. Belt Min. Max. Belt Min. Max. Belt Motor Sheave Belt # Deflected Sheave Belt # Deflected Sheave Belt # Deflected
Hp Dia. (in.) Type of Force Dia. (in.) Type of Force Dia. (in.) Type of Force
Belts (lbs.) Belts (lbs.) Belts (lbs.) 0.75 2.2 3VX 1 3.4 2.2 3VX 1 2.2 2.2 3VX 1 1.3 1 2.4 3VX 1 4.0 2.2 3VX 1 3.1 2.2 3VX 1 1.6 1.5 2.4 3VX 2 3.1 2.4 3VX 2 2.1 2.2 3VX 1 2.5 2 2.4 3VX 3 2.8 2.4 3VX 2 2.9 2.4 3VX 1 2.7 3 3.0 3VX 2 2.9 2.4 3VX 3 2.9 2.4 3VX 2 2.3 5 3.0 3VX 3 4.0 3.0 3VX 3 3.7 2.4 3VX 3 2.5 7.5 3.8 3VX 4 4.7 3.0 3VX 4 4.1 3.0 3VX 2 4.2 10 4.4 3VX 4 5.4 3.8 3VX 4 4.3 3.0 3VX 3 3.8 15 4.4 3VX 5 5.4 4.4 3VX 4 5.4 3.8 3VX 3 4.4 20 5.2 3VX 6 6.0 4.4 3VX 6 4.8 4.4 3VX 3 5.0 25 6.0 3VX 7 5.6 4.4 3VX 7 5.2 4.4 3VX 4 4.7 30 6.8 3VX 7 6.0 5.2 3VX 7 5.3 40 6.8 5VX 4 12 6.0 3VX 7 6.0 50 8.2 5VX 4 14.5 6.8 3VX 8 6.0 60 8.2 5VX 5 14 7.4 5VX 4 13.5 75 10.0 5VX 5 14.5 8.6 5VX 4 14.5 100 10.0 5VX 6 16 8.6 5VX 6 13 125 12.0 5V 7 14 10.5 5V 6 13 150 13.2 5V 7 15.5 10.5 5V 7 13.5 200 15.0 5V 8 16 13.2 5V 8 13 NEMA sheave sizes 250 15.0 8V 6 28 14.0 5V 9 14 Above - NEMA Sheave sizes 300 16.0 8V 7 27 14.0 5V/8V 11 / 7 14 / 24 350 16.5 8V 7 30 14.5 5V/8V 12 / 7 14 / 26 400 17.5 8V 8 29 15.0 5V/8V 13 / 8 15 / 26 450 18 8V 8 32 16.0 5V/8V 14 / 9 15 / 25 500 18.5 8V 9 31 16.5 5V/8V 15 / 9 15 / 27 600 17.5 8V 11 26
700 19.0 8V 12 27
800 20.0 8V 13 28
Exceeds cast iron sheave rim speed –
special sheave material required
In general, 3600 RPM motors 30 HP and
larger are not belted due to bearing
speed-load limitation.