CAT 458-9961 Needle Roller Bearing

CAT 458-9961 is a Caterpillar genuine solid ring needle roller bearing (suitable for heavy-duty applications with limited space, such as planetary gearboxes and hydraulic pump drive shafts, for pure radial force bearing and compact transmission). The following are the original specifications and do not include replacement information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes
Model: 458-9961; Type: Solid ring needle roller bearing without inner ring; Material: Outer ring 52100 bearing steel (quenched + tempered), needle roller chrome steel, cage stamped steel plate; Single weight: 0.82 kg; Operating temperature: -40℃ to +120℃; Compatible with lithium-based grease (NLGI 2); Grease lubrication; Limiting speed: 3200 rpm (grease lubrication); No seal; Rated radial load: 155 kN; Rated static load: 280 kN; Fatigue life: ≥9800 hours; Coefficient of friction: μ≤0.004
Key Dimensions
Inner diameter: 60 mm (2.362 in); Outer diameter: 85 mm (3.346 in); Width: 30 mm (1.181 in); Chamfer: r1.2 mm; Inner diameter tolerance: +0.018/-0 mm; Outer diameter tolerance: 0/-0.010 mm, width tolerance ±0.08 mm, surface roughness Ra 0.1 μm, outer ring hardness HRC 60-64, needle roller hardness HRC 62-66, radial clearance C2 group (0.015-0.025 mm)

Compatible Models and Parts: Compatible with Cat 320GC excavator hydraulic pump drive shaft, 950GC loader gearbox planetary gear shaft, 1 piece per part, suitable for radially space-constrained conditions, withstands pure radial loads, ensuring efficient and stable transmission.

Performance Parameters: Impact load capacity ≥220 kN, wear resistance ≥6200 hours (normal lubrication), suitable for mineral oil/synthetic hydraulic oil environments, shaft fit accuracy H7/h6, cage material stamped steel plate, grease filling amount 22 cm³

Structural and Performance Advantages: No inner ring design: saves radial space, suitable for conditions where the journal directly serves as the raceway, reduces component weight and cost, and improves installation flexibility.

Solid outer ring + densely packed needle rollers: The outer ring provides high-strength support, and the numerous needle rollers ensure uniform load distribution per unit area, making it suitable for heavy-duty and impact conditions. Its load-bearing capacity is superior to ordinary needle roller bearings of the same size.

Stamped steel cage: Precisely guides the movement of the needle rollers, reducing friction and wear, preventing needle roller tilting and jamming, and meeting high-speed operation requirements.

Installation and Maintenance Points (Original Data)

Installation: Clean the bearing and journal/mount. Install using the cold pressing method (pressure ≤80 kN), ensuring flush end faces. After installation, radial runout ≤0.012 mm, journal surface hardness ≥HRC 58, roughness Ra ≤0.1 μm. Welding or hot fitting is prohibited.

Maintenance: Replenish grease every 400 hours, with the grease volume being 1/3-1/2 of the bearing volume. Check wear every 1800 hours. Normal use is possible when journal wear is ≤0.10 mm; replace the journal and bearing if wear exceeds this limit.

Troubleshooting: For abnormal rotation, check lubrication and cleanliness; for abnormal noise, check radial clearance and fit accuracy; for excessive wear, check installation accuracy and lubrication, and replace relevant parts in a timely manner.