Description
CAT 6I-8040 55mm Inner Diameter Pillow Block Bearing
| CAT 6I-8040 55mm Inner Diameter Pillow Block Bearing |
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CAT 6I-8040 is a Caterpillar genuine single-row cylindrical roller bearing, suitable for engineering machinery transmission systems and hydraulic pump shaft supports. The following is purely precise information (without additional description):
Core Parameters and Information
Item Details
Part Model: CAT 6I-8040 (6I8040) Single-row cylindrical roller bearing, NU type (inner ring without flange, axially movable)
Part Type: Single-row cylindrical roller bearing, NU design, withstands pure radial loads, suitable for shaft thermal expansion compensation
Material: Inner ring / Outer ring / Rolling elements: SAE 52100 chrome steel, Cage: Stamped steel plate, Guided by inner ring
Key Dimensions: Inner diameter 60.00mm (m6 tolerance), Outer diameter 110.00mm (G6 tolerance), Width 22.00mm, Chamfer 1.5×45°
Structural Features: No outer ring flange, double inner ring flange, roller guided, radial clearance C3, No Seal Ring (Suitable for Oil Lubrication)
Compatibility: Interference fit with shaft (0.015-0.025mm), clearance fit with bearing housing (0-0.012mm), Operating Temperature: -30℃ to +120℃
Lubrication Requirements: Oil lubrication (CAT DEO-ULS 15W-40), lubrication flow rate ≥1.5L/min, limiting speed (oil lubrication): 6000rpm
Rated Load: Dynamic rated load Cr: 72.0kN, Static rated load Cor: 68.0kN
Compatible Models and Assemblies:
Loaders: CAT 950M, 962M (gearbox output shaft)
Excavators: CAT 336GC, 345GC (hydraulic pump drive shaft)
Road Rollers: CAT CS66B, CS76B (vibratory wheel drive shaft)
Matching Parts: 6I-8040 Bearings, bearing end caps (536-7893), elastic retaining rings (8T-4125), shaft seals (123-4567)
Installation and Fitting Points:
Clean the journal and bearing housing bore, ensuring no burrs or rust. Journal roughness Ra≤0.8μm, bearing housing bore roughness Ra≤1.6μm.
Cold press fitting, pressure ≤30kN. Apply force to the inner ring end face using specialized tooling. Do not strike the outer ring or rolling elements.
After installation, check radial clearance: 0.022-0.032mm, end face runout ≤0.02mm, and rotation without jamming or abnormal noise.
Install the bearing end caps and shaft seals, ensuring reliable sealing and no leaks in the oil lubrication system.
