Reconditioning of Bearings in a Roller Press

The bearings were ready for use after an extremely short time thanks to the fast ,and professional reconditioning. Subsequently they could be mounted without any delay within the planned overhaul schedule for the roller press. According to the current production volume of the customer only in the field of gold produtions seven-digit breakdown costs could be avoided.

As part of the overhaul of one of its two roller presses, the four main bearings had to bereplaced because they had reached the end of their operating life. The replacement bearings held in stock were found to be damaged by corrosion caused by the ingress of water due to incorrect storage. The customer was looking for a maintenance company capable of reconditioning the bearings on site and called their local Schaeffler engineer in Kazakhstan.

In close cooperation between Schaeffler Kazakhstan, Schaeffler Russia and Schaeffler Germany a detailed plan for the reconditioning project was set up. Afterwards two experienced reconditioning experts from Germany travelled to Kazakhstan. They brought everything that was required for an onsite bearing reconditioning, like special mounting and dismounting tools, anti-corrosives, packaging goods, polishing and grinding materials. After an initial inspection, the Schaeffler reconditioning experts cleaned the bearings thoroughly and defined the suitable reconditioning level and the necessary process steps. Afterwards they carried out Level II reconditioning within only six days.

Technical Information about the Roller Press
Type: Roller press
Production volume: 1 000 – 2 000 tons per hour
Feed material: Gold and silver-bearing rock
Bearings effected: FAG cylindrical roller bearings (CRB)
CRB bearing dimensions:

• Inner ring (ID): 710 mm

• Outer ring (OD): 1 000 mm

• Width: 715 mm

• Weight: 1 830 kg

 
Technical Information about the Solution
Level II reconditioning:

• Dismounting

• Cleaning

• Inspection

• Assessment

• Measurement

• Inspection report

• Polishing

• Lubrication/preservation

• Packing