Customizable Heavy Load Roller Bearings 32011 55x90x23 Bearing For Trucks / Mining / Agri Tractors

The 32011 tapered roller bearing is a high-precision heavy-duty mechanical component engineered for large-scale machinery operating in harsh, high-load environments. As part of the 320 series, it features upgraded dimensions compared to the 32008 model: 55mm inner diameter, 90mm outer diameter, and 23mm width. This enhancement significantly increases load-bearing capacity, making it ideal for applications requiring efficient handling of extra-heavy radial loads and high axial forces.

The 32011 bearing features larger, thicker tapered rollers manufactured from premium high-carbon chromium bearing steel (GCr15SiMn). This material offers superior hardenability, toughness, and fatigue resistance. After rigorous heat treatment, rollers achieve surface hardness of HRC58-64 and core hardness of HRC30-45, balancing wear resistance and impact toughness.

Both inner and outer rings feature matched tapered raceways with a larger cone angle (20°-25°) designed to withstand higher axial loads. The raceways undergo advanced heat treatment including carburizing, quenching, and tempering, resulting in uniform hardened layers with excellent fatigue strength.

A high-strength structural steel cage separates and guides the tapered rollers. Precision-machined via CNC turning and milling, the cage features evenly spaced, tapered pockets that prevent collision and friction between rollers. High-end models use brass cages for better thermal conductivity and impact resistance in high-temperature applications.

Designed for extra-heavy combined radial and axial loads with basic rated dynamic load (Cr) of 180-200kN and static load (C0r) of 250-280kN. Capable of supporting radial loads up to 200kN and axial loads up to 80kN.

Optimized for moderate-speed operation with reference speed (grease lubrication) of 2800-3800 r/min and limiting speed (oil-bath lubrication) of 4500-5500 r/min.

Sensitive to shaft-housing misalignment - even 0.2° misalignment can reduce service life by 30%-50%. Requires precision alignment and proper fitting for optimal performance.

• Heavy-Duty Automotive: Drive axles and differential systems in 20-30 ton trucks, commercial buses, and special vehicles
• Industrial Machinery: Mining conveyor gearboxes, crusher shafts, cement mixer gearboxes, and heavy-duty motors (30-50kW)
• Agricultural & Mining: Large agricultural tractors (150+ HP), mining loaders, excavators, and irrigation pumps

• Grease lubrication: Use NLGI 3 lithium-based grease (fill 1/3-1/2 of internal space)
• High-temperature environments: Switch to synthetic polyurea grease (-30°C to 220°C)
• Oil lubrication: Use ISO VG 100-150 industrial gear oil
• Lubrication intervals: 1-3 months for harsh environments, 3-6 months for normal operation

• Visual checks for raceway pitting, roller spalling, or cage deformation
• Vibration monitoring: Normal ≤2.2mm/s; exceed 3.8mm/s indicates issues
• Temperature monitoring: Normal ≤100°C; over 110°C suggests problems
• Ultrasonic testing every 2 months for critical equipment

• Ensure dust-free environment during installation
• Use hydraulic presses and bearing mounting sleeves (avoid hammering)
• Proper fits: Inner ring-shaft (H7/r6) interference, outer ring-housing (H7/js6) clearance
• Verify alignment: Radial ≤0.03mm, axial ≤0.02mm runout

• Store in clean, dry warehouse (5-25°C, humidity ≤50%)
• Keep in original sealed anti-rust packaging
• Store horizontally on sturdy shelves, maximum 1 layer high
• Inspect every 3 months for rust or damage