32311 JR Metric Tapered Roller Bearing 55x120x41.25mm Separable Cone Cup Truck Differential Bearing

1. Product Overview

32311 JR is single row metric separable tapered roller bearing, dimension 55×120×41.25mm. JR optimized logarithmic crowned rollers eliminate edge stress and reduce running heat. Separable cone and cup design simplifies installation, inspection and parts replacement. It withstands heavy radial load plus one-way axial thrust load, widely used in heavy truck differentials, tractor drive axles and construction machinery reducers.

2. Technical Specifications

Dimension drawings and durability test reports available on request.

3. Core Advantages

• Separable cone and cup, no full shaft disassembly during maintenance
• JR optimized crowned rollers for uniform load distribution and longer fatigue service life
• High composite load capacity for heavy vehicle differential and transmission positions
• Durable stamped steel cage stable under continuous vibration and heavy impact
• Superfinished raceway surfaces lower running temperature to avoid bearing burnout
• Standard metric dimension, fully interchangeable with mainstream brand bearings
• Custom clearance, high-temperature grease and exclusive outer ring laser marking available

4. Application Scenarios

• Medium & heavy truck wheel hubs and differential assemblies
• Large agricultural tractor transmission and harvester gearboxes
• Construction loaders and engineering auxiliary reducers
• Mining transport vehicles and heavy industrial conveyor drive ends

Suitable for OEM assembly and aftermarket replacement of heavy mobile machinery under composite radial and axial loads.

5. Why Choose GQZ Bearing

• 25 years production experience of metric tapered roller bearings.
• Vacuum smelting GCr15 steel with complete quenching and tempering heat treatment for stable hardness.
• Full OEM & ODM customization for clearance, lubricant and surface marking.
• Strict full-process inspection covers raw material hardness test, raceway superfinishing, roller sorting and vibration aging test.
• 24-hour professional technical support for load matching, shaft tolerance selection and regular relubrication maintenance plans.
• Factory direct bulk price, stable spot inventory for global auto and machinery buyers.

6. Quality Control

1. Raw material chemical composition and hardness inspection
2. Integral quenching and stress relief tempering to eliminate internal residual stress
3. CNC turning and ultra-precision raceway mirror grinding
4. Precise stamped steel cage forming with consistent roller gaps
5. Dust-free assembly with quantitative grease filling for different temperature working conditions
6. High-speed rotation aging and radial-axial composite load fatigue testing
7. Final full dimension inspection, anti-rust oil coating, neutral moisture-proof export carton packaging

Each production batch passes vibration and noise test to guarantee stable operation in dusty, muddy and bumpy harsh environments.

7. Get A Quote

Send inquiries for 32311 JR bearings used on heavy trucks, agricultural tractors and construction loaders.
Services after inquiry:

1. Standard formal quotation document delivered within 24 working hours
2. Technical guidance for paired bearing installation, shaft/housing tolerance matching and periodic lubrication maintenance
3. Upgrade options: P5 high precision grade, C3 enlarged clearance, high-temperature anti-oxidation synthetic grease
4. Competitive factory bulk unit price for large quantity orders

Please state order quantity, actual load, rotating speed and working environment to receive complete formal quotation documents.

8. FAQ