PC1250 Excavator Bearings

PC1250 Excavator Bearings – Heavy-Duty Slewing Bearing Solutions

When you're operating ultra-large mining excavators like the Komatsu PC1250, bearing reliability isn't just important—it's critical to your operation's uptime and profitability. PC1250 Excavator Bearings are engineered specifically for these demanding applications, featuring a three-row roller Slewing Bearing design that distributes extreme loads across the slewing platform, traveling mechanism, and boom connections. Our bearings utilize 42CrMo alloy steel rings and precision-ground raceways to withstand the punishing conditions of open-pit mining and large-scale earthmoving. With outer diameters ranging from 2200mm to 3200mm and advanced heat treatment processes, these bearings deliver the durability you need to keep your equipment running when downtime isn't an option.

Product Details

Our slewing bearings for PC1250 excavators feature a specialized three-row roller configuration. Two horizontal rows handle axial loads and resist overturning moments, while the vertical row manages radial forces. This architecture provides balanced load distribution superior to conventional single-row designs.

The bearing rings are Forged from 42CrMoA alloy steel—chosen for its exceptional impact resistance in mining applications. After vacuum degassing during smelting, the material undergoes quenching and tempering to achieve optimal mechanical properties. The raceway surfaces receive deep induction hardening (8-12mm hardened depth) to HRC 58-62, while the core maintains HRC 28-32 for toughness—creating the ideal "hard surface, tough core" combination.

Rolling elements are manufactured from GCr18Mo bearing steel with vacuum heat treatment, achieving P4-grade precision. The integrated Gear undergoes CNC form grinding to ISO Grade 6 accuracy, with phosphate pre-treatment reducing mesh noise during operation.

All surfaces receive zinc-nickel coating plus epoxy sealing, providing over 1000 hours of salt spray resistance—essential for humid mining environments.

Why Choose Us?

Industry-Focused Expertise

Located in Luoyang—China's bearing manufacturing hub—we've specialized in slewing bearings for over 20 years. Our 50+ member engineering team focuses exclusively on heavy machinery applications, giving you access to proven solutions rather than generic products.

PC1250 Excavator Bearings

We produce slewing bearings from 50mm to 10,000mm diameter, with precision grades covering P0, P6, P5, and P4. Our CNC vertical lathes, quenching machines, and gear hobbing equipment ensure dimensional accuracy that matches OEM specifications for excavator bearings.

PC1250 Excavator Bearings

Our bearings operate in mining sites across 50+ countries, including Australia, South Africa, and North America. We're ISO 9001 certified and RoHS compliant, ensuring consistent quality meets international standards.

PC1250 Excavator Bearings

Beyond standard products, we provide technical consultation, custom design, and non-standard bearing manufacturing. If you have 3D drawings or need reverse engineering from your existing equipment, our team can develop tailored solutions for your specific operating conditions.

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Technical Specifications

Certification

Features and Benefits

Three-Row Stack Distribution

Unlike single-row bearings that concentrate stress, our plan spreads strengths over three roller ways. You get superior stiffness amid burrowing cycles and decreased hazard of untimely disappointment beneath stun loading.

Deep-Hardened Raceways

The 8-12mm solidified profundity implies wear resistance that endures through amplified benefit interims. Surface spalling takes altogether longer to create compared to shallow-hardened alternatives.

Alloy Steel Construction

42CrMo material provides 30% superior impact durability than standard 50Mn steel. When your bucket strikes shake or experiences sudden resistance, the bearing retains the stun without micro-cracking.

Precision-Ground Equip Teeth

CNC crushing to ISO Review 6 guarantees smooth control transmission to your slewing engine. You'll take note calmer operation and diminished equip wear over time.

Enhanced Corrosion Resistance

The zinc-nickel/epoxy coating framework secures against rust in damp mines, coastal ventures, or high-humidity climates. This expands bearing life in situations where routine coatings fail.

Applications

These bearings are designed for:

· Komatsu PC1250 Arrangement Excavators– Coordinate substitution for slewing ring assemblies

· Caterpillar 6090 Mining Shovels– Similar size and load requirements

· Hitachi EX1200 & Comparable Models– Where measurements and stack appraisals match

· Open-Pit Mining Operations– Coal, copper, press mineral extraction equipment

· Large Earthmoving Projects– Dam development, quarry operations

· Custom Mining Equipment– Non-standard excavators requiring built bearing solutions

Whether you're supplanting worn slewing heading or building custom apparatus, these components give the stack capacity and toughness required for ceaseless heavy-duty operation.

Installation Guide

Pre-Installation Inspection

Check the mounting surface for levelness (tolerance ≤0.5mm over the diameter)Evacuate any erosion, paint, or flotsam and jetsam from bolt hole and seating areas.

Proper Alignment

Position the bearing so adapt teeth adjust with the pinion. Guarantee indeed crevice around the whole circumference some time recently fixing bolts.

Bolt Fixing Sequence

Use a star design (inverse jolts in arrangement) to disperse clamping drive equally. Torque jolts to producer specifications—typically 800-1200 N·m for M30 bolt on this bearing size.

Lubrication

Fill oil fittings with lithium-based EP2 oil containing molybdenum disulfide. Turn the bearing through a few full transformations to convey grease over all raceways.

Post-Installation Check

After 8 hours of operation, re-torque all mounting bolt. Check for unordinary commotion or vibration amid slewing motion.

Exhibition

We attend many famous international exhibitions such as Shanghai International Maritime Exhibition,Mining World Russia, bauma China, CTT Russia, etc

Partners

Your trust, we cherish in heart all times and will reciprocate that trust with unwavering quality.

Packaging & shipping

Your goods are unique, and their journey should be flawless. Therefore, we offer professional and customized packaging services. Our experienced team will evaluate your goods' characteristics, transportation route, and environmental requirements to recommend the most secure solution, such as: wooden crate packaging, sturdy frame packaging, or composite reinforced packaging (wooden crate + iron frame).

Positive customer reviews

Our quality and service have received widespread praise from our customers.

Maintenance and Care

Lubrication Schedule

Relubricate each 100 working hours in clean conditions, each 50 hours in dusty mining situations. Utilize a oil consistent with your unique oil to dodge incongruence issues.

Visual Inspection

Every 200 hours, review seals for harm and check for oil spillage. See for unordinary wear designs on the adapt teeth.

Bolt Torque Verification

Check mounting jolt torque each 500 hours. Free jolts cause uneven stacking and quickened raceway wear.

Clearance Monitoring

Measure axial and radial clearance each 1000 hours. Over the top clearance demonstrates wear requiring bearing substitution some time recently disastrous disappointment occurs.

Storage Guidelines

If putting away save heading, keep them level in a dry environment. Coat uncovered surfaces with rust-preventive oil and pivot quarterly to anticipate wrong brinelling.

Customer Reviews

We don't publish individual testimonials without permission, but our PC1250 excavator bearings currently serve mining operations across Australia, Chile, and South Africa. Repeat orders from these regions reflect the reliability our customers experience in the field.

FAQ

Q: Are these bearings compatible with Caterpillar 6090 excavators?

A: Yes, if the dimensions match your existing bearing. Provide us with your current bearing markings or dimensions, and we'll confirm compatibility.

Q: What's the typical service life?

A: Under normal mining conditions with proper maintenance, expect 8,000-12,000 operating hours. Extreme conditions may reduce this, while lighter duty extends life.

Q: Can you customize dimensions for non-standard applications?

A: Absolutely. We handle custom bearing designs regularly. Share your requirements or existing drawings, and our engineers will develop a solution.

Q: What's the lead time for standard PC1250 bearings?

A: Standard sizes ship within 15-20 days. Custom orders typically require 30-45 days depending on specifications.

Q: Do you provide installation support?

A: We offer technical guidance remotely and can arrange on-site support for large projects. Contact our engineering team to discuss your needs.

Contact Us

Need technical specifications or a PC1250 Excavator Bearings quote? Our bearing specialists are ready to help. Reach us at mia@hgb-bearing.com for fast, professional support.