9T3873 Complete Tapered Roller Bearing Assembly for Caterpillar Excavator 320B 322B 325B 300B Replacement Construction Machinery Spare Parts

Name: 9T3873 Complete Tapered Roller Bearing Assembly for Caterpillar Excavator 320B 322B 325B 300B Replacement Construction Machinery Spare Parts
Brand: GLOBALMACHEX
SKU: 9T3873
Availability: InStock
Rating: 5 (1 reviews)

9T3873 complete tapered roller bearing assembly is dedicated replacement spare part for Caterpillar excavators 320B, 322B, 325B and 300B. The whole bearing is forged and heat-treated from high-hardness bearing steel with optional P0/P6/P5 precision grades. Single-row tapered roller structure bears heavy combined radial and single-direction axial loads simultaneously. Split assembly consisting of inner roller assembly and bearing cup enables easy disassembly and maintenance. Mirror-finished raceway delivers outstanding wear and impact resistance, adapting to dusty harsh working conditions with high-frequency alternating impact of excavator swing and travel mechanisms in mines and construction sites. The full set can directly replace OEM bearing assemblies on site, serving as core wearable spare parts for hydraulic and travel system maintenance & overhaul of medium-sized Caterpillar excavators.

$42.57

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广州宏昇轴承

Main Products: 挖掘机轴承, 推土机轴承, 装载机轴承, 自卸卡车轴承, 深沟球轴承, 圆锥滚子轴承, 调心滚子轴承, 圆柱滚子轴承, 关节轴承, 十字轴承, 滚针轴承, 带座外球面轴承等等工程机械设备轴承。

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成立年份 2017 年成立

主营产品挖掘机轴承, 推土机轴承, 装载机轴承, 自卸卡车轴承, 深沟球轴承, 圆锥滚子轴承, 调心滚子轴承, 圆柱滚子轴承, 关节轴承, 十字轴承, 滚针轴承, 带座外球面轴承等等工程机械设备轴承。

员工人数 50 人以下

工厂面积 1,000-5,000 m²

年销售额 5000 万美元以上

主营市场欧洲 / 东南亚 / 非洲

产品详情

产品规格

贸易信息

1. Product Overview

9T3873 complete tapered roller bearing assembly is specially matched for medium-sized Caterpillar excavator series 320B, 322B, 325B and 300B, manufactured fully compliant with Caterpillar OEM drawing dimensions. The full set consists of two split parts: inner roller assembly and independent bearing cup. It is installed on heavy-load support positions of excavator travel motors, swing bearings and axle transmissions. During heavy excavation, 360-degree continuous rotation and bumpy site driving, the bearing continuously bears single-direction axial thrust and ultra-heavy radial loads. The split structure enables flexible maintenance: worn or damaged inner roller assembly or bearing cup can be replaced separately instead of the whole bearing set, greatly cutting excavator maintenance downtime and construction operation losses of mines and infrastructure sites.

2. Material & Processing Advantages

Integral Forged Bearing Steel Blank: Integrally forged from national standard premium bearing steel with complete quenching and tempering heat treatment. Uniform and stable hardness of rollers and raceways, fine metallurgical structure delivers outstanding resistance to fatigue, pitting and surface spalling, capable of enduring continuous alternating heavy impact loads during excavation work.
Single-Row Tapered Roller Load Structure: Line contact between single-row tapered rollers and raceways realizes concentrated and stable load bearing, which can bear radial force and single-way axial thrust simultaneously, perfectly coping with unilateral complex impact loads generated by excavator swing and travel movement.
Split Independent Component Design: The roller cage inner assembly and outer bearing cup are completely separated. During maintenance, only the worn damaged single component needs to be replaced instead of purchasing the whole bearing assembly, effectively reducing spare parts purchasing costs for excavator hydraulic and travel system maintenance.
Super-Finished Precision Raceway: Mirror-level super-finish grinding on inner and outer raceways achieves ultra-low surface roughness, which reduces running friction and operating temperature. No high-temperature seizure or abnormal noise wear occurs during long continuous excavation work.

3. Precision Grade Selection Guide

P0: Standard general precision with high cost performance, suitable for daily earth excavation and routine full-set replacement of excavators in municipal infrastructure and small & medium mines
P6: Tighter dimensional tolerance for raceway and outer diameter improves assembly concentricity, reduces running vibration and heat generation, ideal for large mining fleets with 24-hour non-stop heavy excavation construction
P5: High-precision grade for complete excavator overhaul and travel/swing hydraulic transmission performance upgrade, with greatly improved running stability and concentricity during high-speed rotation and travel

4. Quality & Installation Instruction

9T3873 tapered roller bearing is strictly manufactured to Caterpillar OEM specifications. The split inner roller assembly and bearing cup matching set requires no secondary machining or grinding, and can be directly installed on mounting bases of excavator travel motors and swing bearings. Every finished product passes full inspection on raceway hardness, internal clearance, dimensional tolerance and wear resistance before delivery. Custom P0/P6/P5 precision grades are available for bulk orders.

Installation steps:

Thoroughly clean motor housing and drive shaft journal to remove hydraulic grease, sand and dust impurities;
Press the inner roller assembly evenly onto the drive shaft journal first;
Align and install the bearing cup, fasten positioning retaining ring evenly to limit axial displacement;
Fill special high-temperature lubricating grease for construction machinery, debug travel/swing mechanism after assembly, and put into construction after confirming no excessive play or abnormal noise.

5. Application Scenarios

Widely applied to travel motor and swing bearing repair & replacement of Caterpillar 320B/322B/325B/300B excavators, export wholesale of Caterpillar construction machinery spare parts, and regular equipment maintenance of municipal road and mining engineering fleets. It solves common failures of original bearings such as abnormal running noise, roller pitting & spalling, raceway wear, excessive transmission clearance, reduced load capacity and high-temperature seizure. The split separate component design allows replacement of only damaged parts, effectively saving spare parts purchasing costs for complete overhaul of excavator hydraulic systems.

OEM Part Number

9T3873

Bearing Assembly Type

Single Row Complete Tapered Roller Bearing Assembly

Applicable Equipment

Caterpillar Excavator

Compatible Models

320B、322B、325B、300B

Main Material

High Hardness Bearing Steel

Bearing Structure

Single row tapered rollers, split inner roller assembly + bearing cup

Precision Grade

Optional P0/P6/P5

Product Category

Caterpillar Excavator Travel & Swing Mechanism Tapered Roller Bearing

Performance Feature

Stable load capacity with single row design, withstand radial and single-way axial loads, split components for individual replacement, wear & impact resistant, suitable for heavy impact excavation working conditions

起订量

1 件

交货期

7 days

供货能力

箱/周

贸易条款

FOB, EXW

Description