Slewing Ring Bearing 1220mm OD 88 Teeth Module 12 for 22 Ton Excavator Swing Circle Replacement

1220 mm Slewing Ring with 88 Teeth for 22-25 Ton Excavators

The 22 to 25 ton class is the most common size in rental fleets. Rings on these machines work long shifts with many different operators, so the failure pattern is usually a mix of gear wear and lost preload rather than a single catastrophic event.

This ring is 1220 mm outside, 1000 mm inside and 115 mm high, with 88 external gear teeth at module 12, 40 mounting holes of 22 mm and a triple row roller raceway in forged 42CrMo. Preload is set on our bench before shipment, so the fitter does not shim.

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

What Fleet Buyers Should Compare

• Tooth count accuracy. An 88 tooth ring will not fit a frame drilled for 90 teeth; we confirm the count against your serial number before shipping.
• Preload report. Each ring ships with a measured preload value in the 0.06-0.10 mm band.
• Grease accessibility. Four ports per row mean a rental machine can be serviced by any operator without removing panels.
• Wear allowance on the gear. Flank hardness is matched to a standard pinion so both parts wear at compatible rates.

Installation

Before fitting, check the carbody face for flatness and clean the bolt holes. Lift on the mounting holes only. Torque in a cross pattern in three passes, then run the machine through ten slow full swings before checking backlash. Recheck torque after 50 working hours.

Packing and Delivery

Delivered in a plywood case with VCI film bolted to a timber base, 285 kg gross. Stock rings ship in eight working days and production batches in twenty-eight. Tell us the machine model and serial number and we will confirm the ring before the order is released.

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.