TFI Bearing Co.,Ltd

Crane Slew Ring

Large diameter slewing ring bearings are critical components in many applications. Military applications include tank turrets, missile launchers, communication antennae, precision radar antennas, and gun mounts. Common commercial applications include aerial lifts, hydraulic excavators, boom cranes, and tunnel boring machinery. Large bearings for these applications are not only expensive to buy, but typically require lead times ranging from two months to a year or longer.

Since the bearing is so critical, careful maintenance is necessary. More than 96% of slewing ring bearing failures are due to surface-originated lubrication problems, contamination, overloading, and improper installation and mounting fits. These surface failures occur much earlier than classical fatigue failures and are less predictable.

Slewing ring bearing life is calculated assuming infinitely rigid and flat mounting structures. A structure that distorts significantly under load, and/or one that is out-of-flat, applies loads to localized areas rather than evenly distributing them. This causes permanent deformation in the local area, leading to early failure.

External Gear Slewing Rings for Excavators
1 pcs
Negotiable
China Factory Tower Crane Spare Parts Slewing Rings Bearings
INA
1 pcs
Hot Sale Hitachi Ex200-2 Excavator Slewing Bearing, Slewing Ring
Hitachi
Ex200-2
Slewing Bearings Ring for Caterpillar Excavator
1 pcs
Negotiable
High Quality Truck Trailers Turntable Slewing Ring
1 pcs
Negotiable
Single- Row Ball Slewing Ring Bearings Series
1 pcs
Negotiable
Truck Trailer Bearing Turn Table Slewing Ring High Quality
1 pcs
Negotiable
Four Point Contact Slewing Ball Bearing Rings with Internal Gear
1 pcs
Negotiable
High Quality Excavator Swing Ring Slewing Bearings
1 pcs
Negotiable
China Manufactured Slewing Bearing for Wind Turbine
INA
1 pcs
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