Subject: Machine Design -I

Topic: Machine Design consideration

Difficulty: Low

Service factor

• Service factor is a multiplier which, when applied to rated power, indicates a permissible power.
• It is the allowable over load factor for motors or other similar devices.
• The service factor (KS ) is the product of various factors, such as load factor (K1), lubrication factor (K2) and rating factor (K3).
• The values of these factors are taken as follows: