32308 JR Metric Tapered Roller Bearing 40x90x35.25mm Separable Cone Cup Truck Gearbox Bearing

1. Product Overview

32308 JR is single row metric separable tapered roller bearing, dimension 40×90×35.25mm. JR optimized logarithmic crowned rollers eliminate edge stress and reduce operating 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 medium truck hubs, tractor drive axles and construction machinery reducers.

2. Technical Specifications

Model: 32308 JR
d:40mm, D:90mm, T:35.25mm
Cone width B:33mm, Cup width C:27mm
Min fillet r:2.5mm
Dynamic load Cr:116kN, Static load C0r:139kN
Grease limiting speed:4600r/min
Net weight:1.06kg
Structure: Single row separable cone & cup open type
Cage: Stamped steel cage
Material: GCr15 bearing steel, hardness HRC60-65
Clearance: Standard CN, C3 customizable
Precision: P0 standard, P6/P5 optional
Operating temp: -30℃ ~ 120℃
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 life
• High composite load capacity for vehicle wheel hub 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 & light truck wheel hubs and differential assemblies
• Agricultural large tractor transmission and harvester gearboxes
• Mini construction loaders and engineering auxiliary reducers
• Mining transport vehicles and industrial conveyor drive ends

Suitable for OEM assembly and aftermarket replacement of mobile heavy 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 32308 JR bearings used on medium trucks, agricultural tractors and mini 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