Swing Bearing for Hitachi ZX200 Excavator

This swing bearing replaces the slewing ring on Hitachi ZX200 (ZAX200) excavators, cross-referencing OEM part numbers 9260971, 9262248 and PG200154. It is an aftermarket part manufactured by Lyhc — not a Hitachi product — built to the 20-tonne class envelope: 1,312 mm outside diameter, 1,082 mm bore, 106 mm overall height, 92 external teeth.

The swing circle is the joint between undercarriage and upper structure. It carries boom, arm, bucket, hydraulic oil and counterweight through every cycle, taking axial load, radial load and tilting moment at once. On a machine that has passed 10,000 hours, this joint — not the swing motor — is usually the first thing to fail.

1,312 mmOutside diameter

1,082 mmBore diameter

106 mmOverall height

Z 92External teeth

Will it fit your machine?

Fitment is confirmed by machine serial number. Dash-3 machines need a dimension check first.

Machine	OEM reference	Status
Hitachi ZX200 / ZAX200	9260971	Direct fit
Hitachi ZX200-5G	9262248	Direct fit
Hitachi ZX210-3	PG200154	Direct fit
Hitachi ZX200-3	9260971	Confirm outside diameter — 1,316 mm on this generation
Hitachi EX200 series	9102727	Not interchangeable — 1,084 mm bore, 36 outer holes

The two-millimetre trap. The EX200 ring is also 1,312 mm outside and 106 mm high, but its bore is 1,084 mm and it carries 36 outer holes instead of 32. The two are the most frequently confused pair in this size class — a ring that looks right on a pallet can bind on the inner race seat or leave the inner ring loose at full torque.

Specifications

Parameter	Value
Machine fitment	ZX200 (ZAX200), ZX200-3, ZX200-5G, ZX210-3
OEM reference	9260971 / 9262248 / PG200154
Outside diameter	1,312 mm (ZX200-3: 1,316 mm)
Bore diameter	1,082 mm
Overall height	106 mm
Outer ring height	72 mm
Inner ring height	95 mm
Gear teeth (Z)	92
Outer ring holes	32 × Ø21
Inner ring holes	36 × M20 × 1.5
Ring material	50Mn/42CrMo/Customized
Rolling element	GCr15 bearing steel
Raceway hardness	55~62HRC
Seal	Double lip seal
Operating temperature	−30 °C to +80 °C

Dimensions shown are the reference envelope for this part number. The approved drawing issued before production governs the supplied product.

What actually kills a ZX200 swing bearing

ZX200 machines generally fail in the raceway before the seal, because they work continuous high-duty cycles rather than sitting idle. Knowing which mode you are looking at decides whether a new ring solves the problem.

Failure mode	What the operator notices	What we control in manufacturing
Raceway fatigue	Vibration through the cab at swing start and stop, metal in the grease sample	Raceway hardness, axial clearance, surface finish
Gear tooth wear from brake abuse	Swing motor whines, teeth visibly sharpened or chipped	Tooth hardness, profile tolerance, pinion match
Seal failure, water ingress	Grease turns to emulsion, rust streaks at the joint	Double lip seal, grease quantity, sealing face finish
Bolt loosening, ring creep	Chucking, abnormal noise, cracked paint around bolt heads	Face flatness, hole position tolerance, torque table
Brinelling from idle vibration	Knock or hesitation at the start of swing	Raceway hardness and preload control

Before you install

1. Measure the old ring. Outside diameter, bore, height, outer hole count, tooth count. Bore is 1,082 mm — not 1,084 mm; outer holes are 32 — not 36. Compare against the drawing we send, not against the part number alone.
2. Clean both mounting faces. Burrs, weld spatter or paint build-up become a tilt once the bolts are torqued, and a tilted ring loses most of its rating.
3. Torque in stages, cross pattern to the value on the mounting sheet. Re-check after the first 50 hours.
4. Grease before the first rotation. Add the specified quantity, then rotate the upper structure by hand through two full turns.
5. Check the pinion, not just the ring. A new ring running against a worn swing pinion will whine and wear early. Verify backlash before assembly.

What ships with the part

Every unit is supplied with a dimension inspection report and a material certificate. A 2D drawing is issued for approval before production; a 3D model (STEP) is available on request for assembly checks. Export packing is bolted to a pallet or crated — a ring of this size that shifts in transit arrives out of tolerance.

Frequently asked

Will this ring fit my ZX200-3?

The ZX200-3 generation is listed with a 1,316 mm outside diameter, against 1,312 mm on the standard ZX200. Measure the old ring or send the serial number before ordering — this 4 mm difference is the second most common mistake on the model after the EX200 bore confusion.

Is this a Hitachi genuine part?

No. It is an aftermarket replacement manufactured by Lyhc, which is not affiliated with, endorsed by or sponsored by Hitachi Construction Machinery Co., Ltd. The OEM part numbers are referenced only to identify the component being replaced.

Can I use an EX200 ring instead?

No. The EX200 ring shares the outside diameter and height but has a 1,084 mm bore and 36 outer holes; the ZX200 has 1,082 mm and 32. It will sit on the mounting face and still be wrong.

How do I confirm the tooth count and bolt pattern?

We send a dimension drawing for approval before production. Check outside diameter, bore, height, outer hole count and tooth count against it — or send a photo of the old bearing and we verify the fitment for you.

Do you supply other Dash generations?

Yes. ZX200, ZX200-3, ZX200-5G and ZX210-3 rings are produced to drawing or sample. Sizes differ between generations, so each is quoted separately.

What is the lead time?

Stock items ship in a few working days; production runs are quoted per order. Send the quantity and destination port for a firm date.

Two numbers settle it. Bore 1,082 mm and 32 outer holes. Send both with your machine serial number and we will confirm the correct ring and quote. → CONTACT US