Excavator Slewing Ring

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ome of the premature failures experienced by slewing ring bearings can be prevented through careful monitoring of symptoms. One of the most basic indicators of slewing ring bearing problems is the condition of the lubricant. If metal particles or flakes are apparent, some form of wear is taking place.

Grinding, popping, or clicking noises from the bearing typically mean there is inadequate lubrication and/or excessive wear in the raceway.

Excessive play or movement signifies that the raceways are worn. As clearance increases, wear is usually accelerated, making close monitoring critical. The play, or clearance, in a slewing ring bearing is another important indicator of a problem. A new bearing is assembled with a specific amount of clearance to compensate for slight out-of-flatness encountered in a mounting structure. This clearance can increase dramatically due to wear.

An increase in torque or binding can mean that there is uneven wear in the raceway. If the turning torque of the bearing increases substantially or if the bearing has tight spots, this usually indicates an uneven load distribution. With excavators, for example, the operator may notice a wobbling or rocking motion in the upper structure, especially when the digging arm is extended with a load. The operator may also sense a resistance to swing and find that the upper swings an inch or two past the point where it should have come to a stop. In advanced stages of wear, the bearing will pop and crack as the machine digs and wings.

Precision Slewing Ring Bearings with External Gear for Cranes

0717905231353 Bearings

Oversea Excavator Slewing Bearings Slewing Ring

0.01 B04286

Heavy Duty Three Row Roller Slewing Bearing Ring

2.87 Inch | 72.9 Mil 4 Bolt Round Flange
N/A With Pilot

New Tower Crane Slewing Bearings Ring Supplier in China

Triple Lip Two-Bolt Base
Standard Duty UL, AFBMA, AGMA, ASM

Three Row Roller Turntable Bearing Slewing Ring

Needle Non Thrust Ro 8482.99.65.30
0.37 38MM Bore; 52MM Outs

Three Row Roller Slewing Ring for Radar 130.32.1000

B04264 0.0
84833080 31171515

Port Crane Three- Row Roller Slewing Bearing Ring

0.58 2.5 Inch | 63.5 Mill
1.063 Inch | 27 Mill Cast Bronze

Three Path Roller Bearing Slewing Rings with Internal Gear

0.205 B04144

Custom Cheap Tower Crane Slewing Ring Bearings

Bearings 0

Three Row Roller Slewing Ring Bearings for Wind Turbine for Sale

33 25MM Bore; 62MM Outs
C3-Loose 1 mm

Three Row Roller Slewing Bearing -- 130.25.500

0 Bearings
SKF 0.0

Three Row Roller Turntable Bearing Slewing Ring

0800675050238 PT INTERNATIONAL