Hitachi Excavator slewing bearing

Hitachi Excavator Slewing Bearing – Drop-In Replacement for ZX Series Equipment

We supply drop-in replacement Slewing Bearings for Hitachi excavators at Luoyang Heng Guan Bearing Technology. Our Hitachi Excavator slewing bearing range covers the full ZX series from 6-tonne mini excavators to 90-tonne mining machines. Whether you're operating a compact ZX60 on urban job sites or running a ZX670 in quarry operations, our bearings deliver the rotational accuracy, load capacity, and durability your equipment demands. Each unit is manufactured to match OEM mounting dimensions, so you get direct fitment without modification.

Material Selection and Heat Treatment Process

We fabricate internal and external rings from 50Mn or 42CrMo Alloy steel, both Offering high quality and hardenability. Manufacturing refines the grain structure, decreases porosity, and progresses sturdiness, making a difference the bearing assimilate affect loads.

Raceways are induction-hardened to HRC52–58, making a wear-resistant surface whereas holding a Tough core. This progresses resistance to weakness and spalling beneath rolling contact. Precision grinding guarantees Tight tolerances and a smooth surface wrap up, improving bearing execution, clamor control, and benefit life.

Need urgent delivery or custom specs? Contact our engineering team: mia@hgb-bearing.com | Response within 4 hours

Technical Specifications

Hitachi Model Product Parameters

Load Distribution and Structural Performance

The Gear can be coordinates inside as standard, with outside Gear alternatives accessible for particular Installation. Inner Gear offers superior assurance from defilement and empowers a more compact swing drive layout.

Single-row four-point contact Bearing suit lighter machines. Each ball contacts the raceway at four focuses beneath combined loads, giving self-centering, precise turn, and solid bucket positioning.

For heavy-duty applications, crossed roller Bearing disseminate loads through line contact or maybe than point contact, expanding contact region by around 10×, decreasing push, and expanding benefit life. Their rotating roller course of action too minimizes inside clearance and moves forward stiffness.

Triple-row roller Bearing isolated hub and Radial stack ways. Two lines of pivotal rollers stand up to Toppling minutes, whereas Radial rollers carry side loads. This plan optimizes stack dealing with and increments capacity without extending the bearing breadth.

Model Coverage and Dimensional Compatibility

We maintain tooling and specifications for the complete Hitachi ZX range:

• Mini excavators: ZX10, ZX20, ZX30
• Compact models: ZX60, ZX70
• Standard excavators: ZX120, ZX130, ZX200, ZX210, ZX240, ZX270
• Heavy excavators: ZX300, ZX330, ZX360, ZX400, ZX450
• Mining class: ZX670, ZX730, ZX900

Each bearing matches OEM bolt circle diameter, mounting hole pattern, and gear module. This ensures direct replacement without adaptor plates or shimming.

Manufacturing Capabilities

Our Luoyang facility manufactures bearings from 50 mm to 10,000 mm in diameter using CNC turning, gear shaping, induction hardening, and precision grinding equipment.

We offer P0, P6, P5, and P4 accuracy grades. Most excavators use P0 or P6, balancing performance and cost, while higher grades are available for tighter runout requirements.

We also provide custom solutions, including modified tooth counts, sealing designs, mounting interfaces, and reverse-engineering services based on worn bearing samples.

Quality Control and Compliance

We keep up ISO9001 certification and conduct dimensional assessment utilizing facilitate measuring machines. Raceway hardness confirmation takes after each Heat treatment bunch. We too perform vibration testing on wrapped up gatherings to distinguish any inconsistencies in rolling component dividing or raceway geometry.

All materials comply with RoHS requirements. Our Hitachi Excavator slewing bearing products ship with material certificates and dimensional reports upon request.

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Frequently Asked Questions

Q: How do I recognize which bearing my Hitachi excavator needs?

A: Check your machine's Nameplate for the ZX assignment and serial number. Contact Us at mia@hgb-bearing.com with this data, and we'll affirm the rectify bearing specification.

Q: What causes untimely slewing bearing failure?

A: Common causes incorporate insufficient grease, free mounting Bolts, and defilement entrance through worn seals. Normal oil interims and jolt Bolts checks essentially expand benefit life.

Q: Can you supply orientation for more seasoned Hitachi models?

A: Yes. We keep up details for ceased models. If drawings aren't accessible, we can reverse-engineer measurements from your existing bearing.

Q: What's the normal lead time for standard models?

A: Standard ZX arrangement heading dispatch inside 2-3 weeks. Custom arrangements require 4-6 weeks depending on specifications.

Q: Do you give Installation support?

A: We supply establishment Installation and Bolts torque determinations with each bearing. Specialized interview is accessible by means of mail or video call if you experience fitment questions.

Contact Us

For technical specifications, pricing, or application support for Hitachi Excavator slewing bearing, reach our engineering team at mia@hgb-bearing.com