Description
CAT 9W-2187 BEARING
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The CAT 9W-2187 is a genuine Caterpillar single-row deep groove ball bearing, suitable for high-speed, light-load components such as hydraulic pumps and gearboxes in small construction machinery. The following are precise original specifications and application information, excluding replacement parts (Cat®…).
Core Technical Parameters
Item Details
Part Model: CAT 9W-2187 (Single Row Deep Groove Ball Bearing)
Bearing Type: Single row deep groove ball bearing, open design, no seal, suitable for oil lubrication
Material: Inner ring / outer ring / balls are made of high carbon chromium bearing steel (AISI 52100), hardness 60–64 HRC; cage is made of stamped steel plate, galvanized for corrosion protection
Key Dimensions: Inner diameter 35 mm (1.378 in), outer diameter 72 mm (2.835 in), width 17 mm (0.669 in), chamfer radius r=1.5 mm
Rated Parameters: Radial dynamic load rating 25.5 kN, radial static load rating 15.2 kN; limiting speed 8500 rpm (oil lubrication), 6000 rpm (grease lubrication); operating temperature -30℃ ~ +120℃
Single Weight: Approx. 0.26 kg (0.573 kg/kg) (lbs)
Tolerance Standards: Inner diameter tolerance P6, outer diameter tolerance P6, radial clearance C3, radial runout ≤ 0.015 mm, surface roughness Ra ≤ 0.4 μm
Recommended Lubrication: NLGI 2 extreme pressure lithium-based grease or ISO VG 46 anti-wear hydraulic oil, suitable for high-speed, light-load, low-vibration conditions.
Structure and Core Characteristics:
Deep Groove Ball Structure: The steel balls and inner and outer raceways are designed with deep grooves, capable of simultaneously with radial and bidirectional axial loads, suitable for transmission components subjected to multi-directional forces.
Open Type without Seals: Seal-free design, suitable for oil lubrication systems, facilitating heat dissipation and lubrication, suitable for internally lubricated parts such as gearboxes and hydraulic pumps.
High-Precision Manufacturing: P6 tolerance and C3 clearance ensure stability during high-speed operation, reduce vibration and noise, suitable for the transmission accuracy requirements of small equipment.
Lightweight Design: Stamped steel plate cage reduces weight while maintaining the positioning accuracy of the steel balls, suitable for the lightweight requirements of small equipment. Compatible Models and Application Scenarios
Compatible Equipment: CAT 301.7CR/302.7CR mini excavators, 226B3/242D skid steer loaders, 906 mini loaders, etc.
Core Applications: Used in high-speed, light-load components such as hydraulic pump spindles, gearbox output shafts, and fan pulleys to support rotating parts, transmit loads, and ensure efficient equipment operation. Suitable for light-load operations in municipal and landscaping applications.
