Slewing Ring Bearing 1000mm Four Point Contact Ball for 13 Ton Class Excavator Swing Circle

1000 mm Four Point Contact Slewing Ring for 13-15 Ton Excavators

On 13 to 15 ton machines the upper structure is light enough that a single raceway can carry the whole load. That is why the original swing circle on this class is a four point contact ball design: one groove, one row of balls, and a section height that keeps the boom foot low.

Our ring measures 1000 mm outside, 810 mm inside and 92 mm high, with 72 external gear teeth at module 10 and 32 mounting holes. It replaces the swing circle on 13-15 ton class excavators without adapter plates.

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

Why a Four Point Design Suits This Class

• One raceway, three load directions. Radial, axial and tilting moment are carried by the same ball row, which keeps the ring compact.
• Low section height. The 92 mm height preserves the original boom foot position and cab clearance.
• Sealed groove. A single lip seal on each side keeps dust out of the ball path, the usual failure point on farm and utility machines.

Installation Notes

Check the mounting face flatness before bolting: four point rings are sensitive to a warped frame, and 0.2 mm of distortion is enough to load one quadrant of the race. Torque the bolts in a cross pattern in three stages, and grease the gear teeth with an open gear lubricant rather than bearing grease.

Packing and Delivery

Each ring ships in a plywood case with VCI film, gross weight 152 kg, seven working days ex-stock. A twelve month warranty applies against raceway spalling when the grease interval is respected. Send your machine model and serial number and we will confirm tooth count and bolt pattern before dispatch.

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.