3782/3720 Inch Tapered Roller Bearing 44.45x93.264x30.163mm Cone Cup Vehicle Axle Bearing

1. Product Overview

3782/3720 is standard inch single row separable tapered roller bearing set, consisting of cone 3782 and matching cup 3720, overall dimensions 44.45×93.264×30.163mm.

Model Code Definition

• 3782: Cone assembly with logarithmic crowned tapered rollers and stamped steel cage for uniform stress distribution
• 3720: Single-flange outer cup, fully separable from cone for easy disassembly, inspection and component replacement

This bearing is engineered to withstand combined heavy radial load and unidirectional axial thrust load. Optimized tapered roller geometry delivers outstanding impact resistance under bumpy working conditions. Superfinished raceway and roller surfaces cut friction heat and extend service life. Widely applied to heavy truck wheel hubs, semi-trailer axles, agricultural tractors, loaders and mining transport vehicles.

2. Technical Specifications

Dimension drawings and long-cycle load durability test reports can be provided on formal request.

3. Core Advantages

1. Separable cone and cup design: Inner and outer components can be installed, inspected and replaced separately without full shaft disassembly
2. Crowned tapered rollers: Eliminate edge stress concentration, greatly improve anti-fatigue performance under heavy shock loads
3. High composite load capacity: Support large radial load plus single-direction axial thrust, ideal for vehicle wheel and axle transmission positions
4. Tough stamped steel cage: Stable roller positioning under frequent vibration and bumpy operation, resistant to deformation
5. Ultra-smooth superfinished contact surfaces: Lower running temperature, reduce grease consumption and avoid premature bearing burnout
6. Universal inch standard dimensions, fully interchangeable with mainstream international brand bearings for convenient aftermarket replacement
7. Customizable service: Special high-temperature anti-wear grease, outer ring exclusive laser marking, adjustable clearance tolerance

4. Application Scenarios

• Heavy commercial vehicles: Truck front & rear wheel hubs, semi-trailer axle assemblies
• Agricultural machinery: Large tractor axles, harvester rotary transmission parts
• Construction equipment: Loader wheel hubs, small excavator auxiliary drive shafts
• Mining transport: Ore carrier vehicle wheel hubs, light-duty heavy gearboxes

Perfect for OEM assembly and maintenance replacement of heavy mobile machinery bearing positions bearing composite radial and axial loads.

5. Why Choose GQZ Bearing

We have 25 years of production experience in inch series tapered roller bearings including 3782/3720 cone-cup sets. All raw materials adopt vacuum degassing smelting GCr15 bearing steel, complete standardized quenching and low-temperature tempering heat treatment to guarantee consistent hardness and stable metallurgical structure. We provide full OEM & ODM customization including clearance adjustment, special lubricant filling and exclusive customer logo laser marking. Strict full-process inspection covers raw material composition & hardness test, raceway ultra-precision grinding, tapered roller dimensional sorting screening and long-cycle vibration aging test. Professional bearing technical engineers provide 24-hour online technical support, covering paired bearing installation matching calculation, shaft/housing tolerance selection and periodic relubrication maintenance guidance. Factory direct bulk wholesale price, stable mass production capacity and sufficient spot inventory to supply global truck, agricultural and construction machinery spare parts purchasers.

6. Quality Control

1. Raw material inspection: Chemical composition, hardness and metallurgical structure detection for steel blanks
2. Heat treatment: Integral quenching + low-temperature stress relief tempering, eliminate internal residual stress and uniform hardness distribution
3. Precision machining: CNC turning, inner/outer ring raceway superfinishing, mirror polishing of tapered rollers
4. Cage processing: Stamped steel cage forming, precision stamping positioning to maintain consistent roller gaps
5. Dust-free assembly workshop: Quantitative grease filling for customized high/low temperature working environment demand
6. Comprehensive performance testing: Continuous rotation high-speed aging test, radial-axial composite load fatigue test, long-term clearance stability durability test
7. Finished product re-inspection: Full dimension measurement, surface flaw recheck, anti-rust oil coating, neutral moisture-proof export carton packaging

Every finished production batch passes dynamic vibration and noise testing to guarantee stable long-term operation under harsh dusty and bumpy working environments.

7. Get A Quote

Submit your purchasing demand for 3782/3720 inch tapered roller bearings used in heavy truck wheel hubs, tractor axles and construction loaders. Full one-stop professional services after inquiry submission:

1. Official standardized quotation document delivered within 24 working hours
2. Professional technical guidance for paired bearing installation matching, shaft/housing tolerance selection and periodic relubrication maintenance schemes
3. Bearing performance upgrade options: P5 high precision grade, customized enlarged clearance, high-temperature synthetic anti-oxidation grease
4. Competitive factory direct bulk unit price for large single-model order quantity

Please state your order quantity and actual working conditions (composite load, rotating speed, operating temperature, muddy dusty environment) to receive complete formal quotation documents.

8. FAQ