HM518445/HM518410 Inch Tapered Roller Bearing 88.9x152.4x39.688mm Trailer Axle

1. Product Overview

HM518445/HM518410 is single row inch separable tapered roller bearing set, matched cone HM518445 and cup HM518410, overall dimension 88.9×152.4×39.688mm. Logarithmic crowned tapered rollers reduce stress concentration and frictional heat. Separable cone and cup design simplifies installation, inspection and parts replacement without full shaft disassembly. It bears heavy combined radial load and unidirectional axial thrust load, mainly applied to semi-trailer axles, heavy truck wheel hubs, large agricultural tractors and mining transport vehicles.

2. Technical Specifications

Model: HM518445/HM518410
d:88.9mm, D:152.4mm, T:39.688mm
Cone width B:39.688mm, Cup width C:30.162mm
Min fillet r:3.30mm
Dynamic load Cr:297kN, Static load C0r:436kN
Grease limiting speed:2400r/min
Net weight:2.8kg
Structure: Single row separable cone & cup open type
Cage: Stamped steel window 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 structure for convenient disassembly and maintenance
• Crowned roller design for even load distribution and extended fatigue service life
• Ultra-large composite load capacity, ideal for heavy semi-trailer axle working conditions
• Reinforced stamped steel cage maintains stable operation under long-term vibration and heavy impact
• Superfinished raceway surfaces lower running temperature and avoid premature bearing burnout
• Standard inch dimension, fully interchangeable with mainstream brand bearings
• Custom clearance, high-temperature grease and outer ring laser marking services available

4. Application Scenarios

• Semi-trailer wheel hubs and axle spindle assemblies
• Heavy-duty truck rear axles and differential components
• Large agricultural tractors and farm transport machinery
• Mining dump trucks and off-road heavy transport vehicles

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

5. Why Choose GQZ Bearing

25 years production experience of heavy-duty inch trailer tapered roller bearings. Vacuum smelting GCr15 steel with complete quenching and tempering heat treatment for stable hardness. Full OEM & ODM customization for clearance grade, precision and special lubricant. Strict full-process inspection includes 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 plans. Factory direct bulk price, stable spot inventory for global trailer and heavy 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 environments
6. High-speed rotation aging and radial-axial composite load fatigue testing
7. Final full dimension inspection, anti-rust coating, neutral moisture-proof export carton packaging

Each 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 HM518445/HM518410 bearings used on semi-trailers, heavy trucks and large agricultural tractors.
Services after inquiry:

1. Standard quotation document delivered within 24 working hours
2. Technical guidance for paired bearing installation, 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 price for large quantity orders

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

8. FAQ