5P-9209: Bearing-Needle Roller

The Cat 5P-9209 is a Caterpillar single-row cylindrical roller bearing, suitable for Cat C15 and C18 engines, as well as some loaders and excavators in their transmissions, hydraulic pumps, and other components. It is designed for high radial load bearing and stable operation at medium to high speeds. Below are the core parameters and application points:

Core Parameters (Precise and Authoritative Version)

Item Details
Basic Information
Model: 5P-9209, Type: Single-row cylindrical roller bearing (NJ type, with a single flange, capable of withstanding unidirectional axial loads), used in transmission input shafts, hydraulic pump spindles, differentials, etc., suitable for medium to high speeds and high radial load conditions, limiting shaft radial runout and ensuring smooth and efficient operation of the transmission system.

Suitable Models
Suitable for Cat C15 and C18 engines, 950M/966M loaders, 336GC/349GC excavators, 777F mining trucks, etc., commonly used in key components such as transmission secondary shafts, hydraulic pump drive ends, and differential housing supports.

Material and Process
Material: [Not specified] GCr15SiMn bearing steel, vacuum melted + quenched + low-temperature tempered, hardness HRC 62-64, contact fatigue strength ≥1400MPa; cage is made of stamped steel plate, rollers are high-precision cylindrical rollers (diameter 12.7mm, quantity 10), clearance grade C3, suitable for thermal expansion requirements under operating conditions; surface oxidation treatment, strong corrosion resistance.

Key Dimensions: Inner diameter 85mm (3.346in), outer diameter 150mm (5.906in), width 24mm (0.945in), flange thickness 5mm, chamfer radius R2mm, weight approximately 1.8kg; rated speed (grease lubrication) 4500rpm, (oil lubrication) 6000rpm, no seal (requires use with bearing housing seals).

Load and Accuracy: Basic rated dynamic load Cr 112kN, basic rated static load Cor 128kN, ultimate radial load 100kN, unidirectional axial load capacity. 15kN, radial runout ≤0.02mm, accuracy class P6, conforming to ISO 15:1998 standard.

Matching Components: Compatible bearing seals (5P-9210), installation tools (8T-8730), extreme pressure lithium-based grease (10-9275), journal tolerance h6, bearing housing bore tolerance H7, axial clearance controlled within 0.03-0.06mm.

Function, Installation, and Maintenance Points:

Core Function: Relying on the line contact between the cylindrical rollers and the inner and outer raceways, it efficiently withstands high radial loads, suitable for medium and high speed operating conditions, limits radial runout of the shaft system, reduces transmission friction loss, extends component service life, and is suitable for high-load operation scenarios in engineering machinery.

Installation Points: Clean the journal and bearing housing bore to remove burrs and oil stains; heat the inner ring to 80-90℃ using a bearing heater before installation, avoiding hammering; after installation, tighten the bearing end cap with bolts to 40-50 N·m; manually rotate the shaft system to ensure no jamming or abnormal noise, and radial runout ≤0.02mm.

Maintenance Points: Check bearing temperature (≤85℃) and grease condition every 2000 hours; replenish grease every 4000 hours; disassemble and inspect every 8000 hours; prevent water and dust from entering the bearing to prevent lubrication failure and corrosion; replace the bearing promptly if rollers peel off, cage deforms, or raceways wear.