If ropes run over over pulleys the working life can be extended by the right choice of pulley and suitable wire rope.
The working life of the rope depends on the following factors:
The ratio between groove diameter and rope diameter should be chosen according to the rope construction:
| Wire rope diameter | Bearing level | Recommended pulley type | ||||
|---|---|---|---|---|---|---|
| high | medium | low | ||||
| up to 3 mm | X | SP pulley with closed ball bearing [Details] |  | |||
| up to 3 mm | X | UP pulley with ball bearing [Details] |  | |||
| up to 3 mm | X | MP pulley with plain bearing [Details] |  | |||
| up to 3 mm | X | BP pulley without bearing [Details] |  | |||
| up to 8 mm | X | LP pulley with needle bearing [Details] |  | |||
| up to 8 mm | X | LP pulley with plain bearing [Details] |  | |||
| up to 8 mm | X | LP pulley without bearing [Details] |  | |||
In addition to choosing the correct pulley bearing, the selection of the appropriate groove diameter for the wire rope plays an important role. The following matrix will help you to find the right pulley for your application:
| Rope construction | Groove diameter in mm in mm |
|---|---|
 | 42 x Rope diameter (uncoated) |
 | 25 x Rope diameter (uncoated) |
 | 16 x Rope diameter (uncoated) |
B = Groove diameter
d = Wire rope diameter incl. coating
r = Groove radius= 0,53 x d
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