30313JR Metric Tapered Roller Bearing 65x140x36mm Separable Cone Cup Heavy Truck Axle Bearing

1. Product Overview

30313JR is single row metric separable tapered roller bearing, overall dimension 65×140×36mm. JR logarithmic crowned roller structure reduces edge stress and operating heat. Separable cone and cup design simplifies installation, inspection and parts replacement without disassembling the whole shaft. It withstands large combined radial load and one-way axial thrust load, commonly used on heavy truck wheel hubs, large tractor drive axles and construction machinery reduction boxes.

2. Technical Specifications

Model: 30313JR
d:65mm, D:140mm, T:36mm
Cone width B:34mm, Cup width C:27mm
Min fillet r:3mm
Dynamic load Cr:186kN, Static load C0r:228kN
Grease limiting speed:3600r/min
Net weight:2.32kg
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 temperature: -30℃ ~ 120℃
Dimension drawings and durability test reports available on request.

3. Core Advantages

• Separable cone and cup for easy maintenance and component replacement
• JR optimized crowned rollers realize uniform load distribution to extend service life
• Strong composite load capacity for heavy vehicle axle and transmission positions
• High-strength stamped steel cage runs stably 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 outer ring laser marking services available

4. Application Scenarios

• Medium and 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

Fit 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 working environments.

7. Get A Quote

Send inquiries for 30313JR 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.