Slewing Ring Bearing 1350mm Triple Row Roller for 30 Ton Excavator Swing Drive Replacement

1350 mm Triple Row Roller Slewing Ring for 30 Ton Excavators

A 30 ton machine working rock loads the swing circle far harder than its size suggests. Digging shock arrives through the boom, the carbody twists, and the ring has to hold that moment without losing preload. This is where a triple row roller ring is used instead of a ball type.

The ring is 1350 mm outside, 1110 mm inside and 130 mm high, with three separate roller rows: one takes axial load, one takes radial load and one takes the tilting moment. The race is forged 42CrMo, hardened to 55-60 HRC and ground after heat treatment.

Talk to our engineer on WhatsApp: +86 180 2625 4557 — send your machine model and serial number, and we confirm the slewing ring tooth count the same working day.

Specification

Design Choices That Extend Service Life

• Separate raceways. Each load direction has its own roller path, so a shock load does not deform the axial path.
• Through hardened teeth. Gear flanks are induction hardened after cutting, which resists pitting from the swing pinion under high torque.
• Four grease points per row. Every raceway can be serviced independently, which matters when one side of a quarry machine works harder than the other.

Fitting Guidance

These rings are heavy and stiff: lift with a four leg sling on the mounting holes, never on the gear teeth. Check the carbody face for flatness and clean the bolt threads before torquing to the OEM figure in three passes. After the first 50 hours, re-torque and check the gear backlash.

Packing and Delivery

Shipping is in a strapped heavy plywood case on a timber base, gross weight 405 kg. Stock rings leave Guangzhou in ten working days; production runs take thirty days. Confirm your machine model, serial number and old ring diameter with us before ordering, and we will verify the tooth count.

Workshop and Production Capability

Every ring is machined, gear cut, induction hardened and ground in our Guangzhou workshop, then assembled, greased and preload checked on a three point bench before packing. The photos below show the production floor and inspection area that support this series.