The training content covers: - Importance of proper bearing storage - Importance of proper bearing installation - Importance of bearing maintenance - Bearing mounting and dismounting methods

1. Bearing Handling & Maintenance

2. 27 May 2020
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3. • Store the bearings in their original packing to avoid any contamination or corrosion
• Place large and heavier bearings on a flat surface with complete support at the bottom.
• Never store the bearings in upright position
• Store bearings in cool and dry rooms away from direct sunlight
• Avoid contact with aggressive media like chemicals, gases, acidic fumes etc. during storage
• Open bearings can be stored up to five years. Greased bearings needs regular attention
Importance of bearing maintenance
Importance of proper bearing storage

4. • Ensure safety of the equipment and the operator
• Simplified and faster process
• Maximizing the use of load carrying capacity
• Enhance the bearing life
• Prevent creeping of rings from turning on or in their seats under load
Importance of bearing maintenance
Importance of proper bearing installation

5. • Ensure the work area is clean and free of dust, dirt and moisture to avoid bearing contamination
• Wipe any surface where the bearing will be placed to avoid contamination
• Use hardened manual drivers to dismount the old bearings. Avoid softer material rods like aluminum or brass
• Softer material can give away chips which can enter bearings.
• Use clean kerosene, diesel or mineral turpentine oil (MTO) to clean the bearings
• Avoid drying the washed bearing with compressed air. It can contaminate with dirt or moisture
• Avoid washing new bearings
• Remove the bearing from the original carton only when the bearing is ready for mounting
Importance of bearing maintenance
Clean Work Area – First essential step

6. Avoid direct hammer blows on the bearings while mounting. Follow recommended mounting methods
• Different mounting methods
• Mechanical method
• Hydraulic method
• Thermal method
Importance of bearing maintenance
Mechanical Method Hydraulic Method Thermal Method
Bearing mounting methods

7. Importance of bearing maintenance
Mechanical Method
• Suitable for small size bearings
• Use proper sleeves
• Apply even mounting force
Hydraulic Method
• Suitable for medium & large size bearings
• Use proper sleeves and support plates
Thermal Method
• Suitable for higher interference fits
• Induction heaters are in extensive use
• Equipped with temperature sensor
& demagnetizer
• Avoid bearing heating beyond 120
0
C
• Use safety glows to handle hot bearings
Bearing mounting methods

8. • Different dis-mounting methods
• Mechanical method
• Hydraulic method
Importance of bearing maintenance
Bearing dis-mounting methods
Mechanical Method Hydraulic Method

9. Fillet radius too largeShoulder diameter too small
Shoulder diameter too large Correct shaft shoulder diameter
and fillet
Importance of bearing maintenance
Importance of shaft fillet & shoulder diameter

10. Importance of bearing maintenance
Avoid damaged parts.
• Ensure all parts are free of burrs or sharp edges
• Check bearing seating area. Ensure correct size as per the recommended fit level

11. Importance of bearing maintenance
• Apply mounting force on the correct ring
• Push inner ring when mounting on to the shaft
• Push outer ring when mounting in to the housing
• Follow recommended mounting method; Mechanical, Hydraulic or thermal depending on the size & fit level of the bearing
Avoid mounting damages
Wrong mounting method Correct mounting method

12. Keep learning
Key Contact details for any queries:
Hanumanth Kulkarni
NEI Technical Training
(E) hanumanth.kulkarni@nbcbearings.in
(P) +91 141 2223221