55200C/55437 Inch Tapered Roller Bearing 50.8x111.125x30.162mm Cone Cup Heavy Duty Vehicle Bearing

1. Product Overview

55200C/55437 is standard inch-size single row separable tapered roller bearing assembly, composed of cone 55200C (inner ring, tapered rollers and pressed steel cage) and cup 55437 (outer ring), overall dimension 50.8×111.125×30.162mm.
Model Code Definition

- 55200C: Cone assembly model with optimized logarithmic crowned tapered rollers for uniform stress distribution
- 55437: Matching single flange outer cup, fully separable from cone for easy separate installation and maintenance
- Inch series design, specially engineered to bear simultaneous heavy radial load and unidirectional axial thrust load, matched in pairs for bidirectional axial force support.

Tapered contact geometry balances composite loads effectively, reinforced pressed steel cage fixes tapered rollers firmly against shock and vibration. Ultra-precision superfinished raceway and roller surfaces reduce friction heat and extend service life. Widely applied to heavy-duty truck wheel hubs, construction machinery axles, forklift drive shafts, agricultural heavy equipment, mining transmission assemblies and heavy industrial gearboxes.

2. Technical Specifications

Technical dimension drawings and long-cycle load durability test reports can be provided upon formal customer request.

3. Core Advantages

• Separable cone and cup structure: Inner assembly and outer ring can be installed, inspected and replaced separately without disassembling the whole shaft system
• Optimized crowned tapered rollers: Eliminate edge stress concentration, uniform load distribution, greatly improve anti-fatigue performance under heavy impact
• High composite load capacity: Perfectly withstand large radial load plus single direction axial thrust load, ideal for wheel hub and transmission axial force working conditions
• Tough stamped steel cage: Anti-deformation under severe vibration, stable roller positioning during frequent start-stop and bumpy operation
• Low friction superfinished contact surfaces: Lower operating temperature, reduce grease consumption and avoid premature bearing burn-out
• Standard unified inch series dimensions, fully interchangeable with mainstream international brand equivalent bearings for aftermarket replacement
• Complete customizable service: Special high-temperature anti-wear grease, customer exclusive outer ring laser marking, customized clearance tolerance

4. Application Scenarios

• Heavy commercial vehicles: Heavy truck front & rear wheel hubs, semi-trailer axle assemblies
• Construction machinery: Excavator drive axles, loader wheel hubs, road roller transmission shafts
• Material handling equipment: Forklift main drive axles, container handling machinery rotary parts
• Agricultural heavy machinery: Large tractor axles, harvester transmission assemblies
• Mining & general heavy industry: Mine transport vehicle wheel hubs, heavy-duty gearbox intermediate shafts

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

5. Why Choose GQZ Bearing

• We own 25 years of professional manufacturing experience for inch series tapered roller bearings including 55200C/55437 cone-cup assembly bearings.
• 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 internal metallurgical structure.
• One-stop OEM & ODM customization service: clearance tolerance adjustment, special lubricant filling, outer ring surface anti-rust strengthening and exclusive customer logo laser marking.
• Strict full-process quality inspection system: raw material composition & hardness test, raceway ultra-precision grinding, tapered roller dimensional sorting screening, long-cycle vibration aging test and batch load sampling inspection.
• Professional bearing technical engineers provide 24-hour online technical support, covering paired installation matching calculation, shaft/housing tolerance selection and regular relubrication maintenance guidance.
• Factory direct bulk wholesale price, stable mass production capacity and sufficient spot inventory to supply global truck, construction and agricultural 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 keep consistent roller gap
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 heavy shock and dusty harsh working conditions.

7. Get A Quote

Submit your purchasing demand for 55200C/55437 inch tapered roller bearings used in heavy truck wheel hubs, construction machinery axles and forklift transmission assemblies.
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, dusty muddy environment) to receive complete formal quotation documents.

8. FAQ