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Turntable Bearings: Installation, Maintenance, and Troubleshooting
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Turntable Bearings: Installation, Maintenance, and Troubleshooting


Turntable bearings are a type of large bearing with a special structure that can simultaneously withstand axial, radial, and tilting moments. They have high load capacity and integrate multiple functions such as support, rotation, transmission, and fixing. Compared to regular rolling bearings, the significant characteristic of turntable bearings is their ability to withstand large eccentric loads (i.e., tilting moments). There are different industrial bearing types. The load capacity is greatly related to the eccentric distance of the load. Most turntable bearings have mounting holes, lubrication holes, and sealing devices, thus featuring compact structure, simple installation, and convenient maintenance.


Installation of Turntable Bearings


Before installing turntable bearings , the mounting surface of the host machine should be checked. The support components must have sufficient strength, and the connection surface should be machined with a flat surface free from debris and burrs. If the required flatness cannot be achieved through machining, highly strong special plastics can be injected as fillers to ensure the precision of the mounting surface and to dampen vibrations.


Turntable bearing raceways have quenched soft zones marked with an "S" on the ends of the raceways. During installation, these soft zones should be positioned in non-load or infrequent load areas (the plug hole is always located at the soft zone).


When installing turntable bearings, first perform radial positioning, tighten the bolts in a cross pattern, and check the rotation of the bearing. When tightening the bolts, sufficient pre-tightening force should be applied; the pre-tightening force should be 70% of the bolt material's yield limit. Use tempered flat washers and avoid using spring washers.


Maintenance of Turntable bearings


For turntable bearings that are installed and operational, after 100 hours of continuous operation, a thorough check of the pre-tightening torque of the mounting bolts should be performed. Subsequently, repeat this check every 500 hours of continuous operation.


Turntable bearings should be filled with an appropriate amount of grease after installation, while rotating the bearing to evenly distribute the grease. After a period of operation, some grease loss is inevitable; therefore, add grease every 50 to 100 hours of normal operation.


Transportation and Storage of Turntable bearings


During transportation, bearings should be placed horizontally on the transport vehicle with measures taken to prevent sliding and vibration. Auxiliary supports should be added if necessary.


Turntable Bearings: Causes of Failure During Operation


  • Contact Fatigue Failure

  • Wear Failure

  • Fracture Failure

  • Clearance Change Failure


Turntable bearings, during operation, can experience clearance change failure due to external or internal factors, leading to changes in original fit clearance, reduced precision, and potential locking ("biting"). External factors include excessive interference, improper installation, the expansion caused by temperature rise, and instantaneous overload. Internal factors include the unstable state of residual austenite and residual stress, which are primary causes of clearance change failure.

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Products
Track Roller
Deep Groove Ball Bearing
Self-aligning Ball Bearing
Angular Contact Ball Bearing
Thrust Ball Bearing
Needle Roller Bearing
Cylindrical Roller Bearing
Spherical Roller Bearing
Tapered Roller Bearing
Thrust Roller Bearing
Crossed Roller Bearing
Slewing Ring
Pillow Block Bearing
Plain Bearing
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Products
Track Roller Deep Groove Ball Bearing Self-aligning Ball Bearing Angular Contact Ball Bearing Thrust Ball Bearing Needle Roller Bearing Cylindrical Roller Bearing Spherical Roller Bearing Tapered Roller Bearing Thrust Roller Bearing Crossed Roller Bearing Slewing Ring Pillow Block Bearing Plain Bearing
Industries
Automated Warehousing Medical Apparatus And Instruments Automation Production Industrial Manufacturing Food, Beverage And Packing Equipments Special Vehicles Port Facilities

Contact Us

+86-021-54846037
Info@thb-bearings.com
601, Budling 2, No.525, YuanJiang Road, Minhang District, Shanghai, China

Copyright© THB BEARINGS CO.,LTD. All Rights Reserved.

Sitemap  | Privacy Policy