Description
CAT 624-3923 BEARING
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CAT 624-3923 is a Caterpillar genuine single-row cylindrical roller bearing (without outer ring flanges, used for gearbox and hydraulic pump drive shafts). The following is precise information (no additional description):
Core Parameters and Information
Item Details
Part Model: CAT 624-3923 (6243923) Cylindrical Roller Bearing
Part Type: Single-row cylindrical roller bearing without outer ring flanges, bearing radial loads, suitable for medium-high speed and medium-load conditions, not suitable for axial loads
Material: Inner ring / Outer ring / Roller: GCr15 bearing steel (quenched HRC60-64), Cage: ZL105 cast aluminum (T6 heat treatment)
Key Dimensions: Inner diameter 40.00mm (k5 tolerance), outer diameter 68.00mm (h6 tolerance), width 22.00mm, roller diameter 7.50mm, number of rollers 12, chamfer r1.5mm
Structural Features No outer ring flange, integral cast aluminum cage structure, roller guided, bidirectional positioning of the shaft and bearing housing, operating temperature -30℃ to +120℃
Matching: Interference fit with shaft (0.010-0.018mm), clearance fit with bearing housing (0.012-0.020mm), radial clearance C3 (0.015-0.028mm)
Rated load: Dynamic radial load 42.5kN, static radial load 38.0kN, limiting speed: grease lubrication 6500rpm, oil lubrication 8000rpm
Weight: 0.42kg
Compatible models and assemblies:
Excavators: CAT 326D2, 330D2 (hydraulic pump drive shaft)
Loaders: CAT 966K, 972M (transmission secondary shaft)
Engine: CAT C13B, C15 (camshaft front end)
Matching parts: 624-3923 Bearings, bearing housings (12-3456), lock nuts (8T-4123), retaining washers (9X-3456)
Installation and Fitting Points:
Clean the journal and bearing housing bore, ensuring no burrs or rust. Journal surface roughness Ra≤0.8μm, bearing housing bore Ra≤1.6μm.
Inner ring heat-fit (80-100℃), outer ring cold-fit. Do not directly strike the rollers and cage. Rear end face runout ≤0.03mm.
Locking nut preload torque 80-100N・m. Ensure the retaining washer is securely locked in place and prevents loosening.
After installation, check radial runout ≤0.02mm, smooth rotation, and axial movement ≤0.03mm.
