To ensure prolonged lifespan of your VSI crusher bearings, regular lubrication with the correct grease volume and grease type is essential. All bearing cartridges are designed with a bottom bearing to withstand V-Belt tension, a top bearing to absorb the rotor centrifugal forces and counter V-Belt tension, and a top grease labyrinth to purge foreign material and prevent any dirt ingress into the bearing cartridge.
The bearing cartridge has three (3) grease ports, one for the bottom bearing, one for the top bearing and one to service the labyrinth. Both bottom and top bearings require 10g’s of grease per 8hr shift. The labyrinth requires 50g’s of grease per 8hr shift. To get an idea of how much 10g for the bearings and 50g for the labyrinth is, see the images of grease in a matchbox below.
10 Grams of grease
50 Grams of grease
When using manual lubrication (hand / foot pump) use only Shell Gadus S2-V100-3 or equivalent. This grease has an ISO100 base oil for lubrication, but a thick soap base (NGLI 3). This means the grease base oil is thin to prevent excessive heat, but the grease is also very sticky and will not drip out of the vertical bearings under normal operating temperatures.
Bearing cartridge repair tips:
When repairing failed bearing cartridges, pay special attention to the following:
Typical causes of bearing cartridge failures: