CAT 161-8218 BEARING

CAT 161-8218 is a Caterpillar original single-row deep groove ball bearing, suitable for various engineering machinery transmission systems. It is used to bear radial loads and allow for smooth high-speed rotation of the shaft. The following is purely accurate information (without additional description):

Core Parameters and Information

Item Details
Part Model: CAT 161-8218 (1618218) Single-row Deep Groove Ball Bearing

Part Type: Deep groove ball bearing, used in transmission systems, hubs, or gearboxes, bearing radial loads, allowing for certain angular deviations and high-speed operation

Material: Bearing steel (GCr15), hardness HRC60-64, outer ring surface phosphated, cage made of stamped steel plate

Key Dimensions: Inner diameter 65.00mm, outer diameter 120.00mm, width 23.00mm, chamfer radius 1.5mm, clearance C3 group

Structural Features: Double-sided metal dust cover, no sealing lip, cage made of stamped steel plate, number of steel balls 12, steel ball diameter… 14.3mm
Compatible Structure: Compatible with 65mm diameter journals, installation tolerance k6, operating temperature -40℃ to +120℃, limiting speed 6300rpm (grease lubrication), 8500rpm (oil lubrication)
Rated Load: Basic rated dynamic load 47.5kN, basic rated static load 31.5kN, fatigue life L10≥5000h
Compatible Models and Assemblies:
Excavators: CAT 320D, 323D, 326D (slewing gearbox input shaft, travel drive wheel axle)
Loaders: CAT 938K, 950GC (gearbox output shaft, drive shaft support)
Compatible Assemblies: 320D slewing gearbox input shaft bearing assembly, 950GC gearbox second shaft support bearing assembly
Matching Parts: 161-8218 bearing, 161-8219 bearing housing, 161-8220 Sealing ring, 161-8221 retaining ring
Installation and Fitting Points
Clean the journal and bearing housing bore before installation, ensuring they are free of burrs and oil contaminants. Use hot fitting (oil temperature 80-100℃) or cold pressing. Do not directly strike the bearing outer ring.

Journal fit tolerance k6, bearing housing bore fit tolerance H7. After installation, radial runout ≤0.02mm, axial runout ≤0.05mm.

Lubrication is grease lubrication. Fill to 1/3-1/2 of the bearing’s internal space. Recommended grease type is CAT DEO-ULS or equivalent lithium-based grease.

Use a puller for disassembly to avoid damaging the journal or bearing housing bore. When replacing bearings, it is recommended to check in pairs and replace bearings on the same side.