V-Belt & Pulley Selection
Ask us for help in recommending the right belts for your application
- Technical
The following minimum information is required to allow selection of the correct V-belt system parts:-
- Speed (rpm) of drive and driven shafts
- Motor power (HP or KW)
- Type of "prime mover" or motor and starting style for electric motors
- Shaft diameter of drive and driven shafts (inch or metric)
- Duty cycle (to allow selection of a suitable service factor)
- Any dimensional constraints or expected center distance between shafts
Selection of service factor
SERVICE FACTOR | Prime mover & Working hours / day | ||||||
Soft starts | Heavy starts | ||||||
AC-Star Delta; DC-Shunt wound; ICE > 4 cylinders; Dry or fluid couplings; soft start devices | AC-Direct online starts; DC Series & compound wound; ICE< 4 cylinders; Other | ||||||
Duty level | Type of driven machine | <10 | 10 - 16 | >16 | <10 | 10 - 16 | >16 |
Light | Agitators (uniform density); fans < 7.5 KW; centrifugal pumps | 1.0 | 1.1 | 1.2 | 1.1 | 1.2 | 1.3 |
Medium | Agitators (variable density) ; fans > 7.5 KW; pumps, generators; sawmills | 1.1 | 1.2 | 1.3 | 1.2 | 1.3 | 1.4 |
Heavy | Reciprocating pumps; hammer mills; presses; shears; vibrating screens | 1.2 | 1.3 | 1.4 | 1.4 | 1.4 | 1.6 |
Extreme | Crushers, ball mills | 1.3 | 1.4 | 1.5 | 1.5 | 1.5 | 1.8 |
Design power = Motor power x service factor