CAT 271-6862 RACE-BEARING

CAT 271-6862 (2716862) is the outer race of a Caterpillar double-row tapered roller bearing, suitable for loader/excavator drive axle differentials or steering knuckles. It is matched with the inner ring and roller assembly to withstand high radial and bidirectional axial combined loads, ensuring transmission positioning and smooth operation under heavy-duty conditions. The following is the core information:

Core Technical Parameters
Item Details
Part Model: CAT 271-6862 (2716862) Double-row tapered roller bearing outer race (commonly matched with CAT 271-6863 inner ring, suitable for drive axle differentials/steering knuckles)

Core Material: Outer race: Chromium bearing steel (GCr15, HRC 60–64), raceway ultra-precision ground (Ra≤0.08 μm), surface anodized for rust prevention (thickness 5–8 μm), compatible with lithium-based grease (NLGI 2, -20℃ to +120℃)

Key Dimensions Inner diameter 100 mm, outer diameter 180 mm, width 63 mm, cone angle 12°, raceway curvature radius 45 mm, mounting surface runout tolerance ≤0.02 mm, compatible with M16×2 bolts (mounting hole spacing 200 mm), 2 lubrication grooves (compatible with lubrication hole grease injection)

Single weight: Approx. 2.1 kg

Compatible models: CAT 966M/972M wheel loaders (drive axle differential), 320GC/323GC excavators (steering knuckle), used with 271-6863 inner ring and roller set, capable of withstanding a combined radial load of 240 kN + axial load of 180 kN

Operating compatibility: Rated radial load 240 kN, rated axial load 180 kN, limiting speed 3000 rpm, operating temperature -30℃ to +120℃, suitable for dusty/ Complex working conditions at construction sites such as those involving crushed stone

Core Functions and Structural Features

Load Bearing and Positioning: As the outer race of a double-row tapered roller bearing, it mates with the inner race to form a raceway, bearing high radial loads and bidirectional axial loads, suppressing shaft runout, and ensuring precise positioning of the differential/steering knuckle.

High-Precision Fit: Ultra-precision grinding and precise tapering of the raceway control the clearance between the bearing and the inner race and roller assembly within 0.01–0.03 mm, ensuring bearing preload accuracy and reducing transmission impact and noise.

Wear and Rust Resistance: GCr15 bearing steel is hardened, resisting impact loads of 320 kN. Surface oxidation treatment enhances rust resistance, making it suitable for humid and dusty construction conditions and extending service life.

Strong Adaptability: Compatible with CAT 271-6863 inner races and roller assemblies, and also compatible with inner races and roller assemblies of the same specifications (YM/SEM/GD quality), ensuring load compatibility and installation accuracy.