SERVICE FACTOR

c1 FOR V-BELT SECTION SELECTION

With the c1 factor, allowance is made for the load conditions which are characteristic of the listed driving unit types and driven units as well as of the number of operating hours. If the driving unit or driven unit in question is not listed, we recommend selecting a listed unit which is as close to the applicable load conditions as possible. Under extreme operating conditions with e.g. sharp dust, high temperatures, high starting torque and heavy shock loads, the c1 factor should be increased. Our technical department is always ready to help our Customers with professional advice within this area.

Driven unit

Driving unit / Motor

AC motors, single- and three-phase with star-delta start. DC shunt-wound motors. Multiple cylinder internal combustion engines.

AC motors, single- and three-phase, series wound, slip-ring motors with direct start.

DC motors, series and compound wound. Single cylinder internal combustion engines.

Number of operating hours per 24 hours

Number of operating hours per 24 hours

Up to 10

Over 10 to 16

Over 16

Up to 10

Over 10 to 16

Over 16

Agitators for liquids. Small centrifugal blowers. Fans up to 7.5 kW. Light-duty conveyors.

1.0

1.1

1.2

1.1

1.2

1.3

Belt conveyors for sand, grain, etc. Dough mixers. Fans over 7.5 kW. Generators. Washing machines. Machine tools. Punching, pressing and shearing machines. Printing machines. Positive displacement rotary pumps. Vibrating and rotary screens.

1.1

1.2

1.3

1.2

1.3

1.4

Brick-making machinery. Bucket elevator. Piston compressors. Screw conveyors. Hammer mills. Hollanders. Piston pumps. Positive displacement blowers. Crushers. Woodworking machinery. Textile machinery.

1.2
1.3
1.4
1.4
1.5
1.6

Gyratory and jaw-roll crushers. Mills (ball/rod). Hoists (heavy loads). Rolling mills, calenders etc. for the rubber and plastics industries.

1.3

1.4

1.5

1.5

1.6

1.8