CAT 1J-3710 Drawn Cup Needle Roller Bearing

CAT 1J-3710 is a Caterpillar genuine stamped outer ring needle roller bearing (fitted to steering clutch/transmission shift forks, for radial heavy-duty support in compact spaces of construction machinery). The following is pure raw data, without replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes Model 1J-3710, Type: Stamped Outer Ring Needle Roller Bearing (with cage, no inner ring), Material: Outer ring is low carbon steel (ST12) surface hardened, needle rollers are high carbon chromium bearing steel (AISI 52100), cage is phenolic resin, Single weight: 0.18 kg, Operating temperature: -40℃ to +120℃, Suitable for: Mineral oil / Synthetic gear oil, Lubrication method: Grease lubrication / Oil lubrication, Limiting speed: 3200 rpm (grease lubrication) / 4000 rpm (oil lubrication)

Key Dimensions Inner diameter: φ35 mm (1.378 in), Outer diameter: φ47 mm (1.850 in), Width: 22 mm (0.866 in), Number of needle rollers: 12, Needle roller diameter: φ4 mm, Needle roller length: 20 mm, Outer ring wall thickness: 1.2 mm, Chamfer at both ends: r1 mm, Inner diameter tolerance: + 0.015/-0 mm, outer diameter tolerance 0/-0.012 mm, width tolerance ±0.15 mm, surface roughness Ra 0.3 μm
Compatible Models and Parts: Compatible with Cat D8R/D8T bulldozer steering clutch release bearing housing, 980G loader gearbox shift fork shaft, C13 engine fuel pump drive shaft, 1 piece per location, withstands pure radial heavy load, suitable for compact installation space, no inner ring design allows direct mating with hardened journals

Performance Parameters: Basic rated dynamic load Cr=28.5 kN, basic rated static load Cor=42.8 kN, fatigue life ≥8000 hours, needle roller hardness HRC 62-64, outer ring surface hardness HRC 58-62, cage temperature resistance ≥150℃, coefficient of friction μ≤0.008, Open-type sealing (compatible with dust ring installation)

Structural and Performance Advantages

Stamped Outer Ring Design: Thin and lightweight shell, suitable for compact installation spaces; the outer ring lip secures the needle rollers, prevents contamination, and stores oil, resulting in lower costs.

No Inner Ring Configuration: Directly mates with hardened journals (hardness ≥ HRC 58), reducing the number of parts, simplifying assembly, and increasing radial load capacity.

Phenolic Resin Cage: High strength and oil resistance, precisely guides the needle rollers, reduces friction and wear, and is compatible with transmission fluid conditions.

AISI 52100 Needle Rollers: High hardness and wear resistance, excellent fatigue resistance, suitable for heavy-duty and impact conditions.

Installation and Maintenance Points (Original Data)

Installation: Clean the bearing and mounting base. Use a press-fit method (pressure ≤25 kN) to ensure the outer ring end face is flush with the seat bore end face. The journal surface roughness Ra ≤0.4 μm, interference fit 0-0.01 mm, and radial clearance 0.008-0.015 mm after installation.

Maintenance: For grease lubrication, use lithium-based grease (NLGI grade 2), filling 1/3-1/2 of the bearing cavity. Check lubrication status every 1500 hours. For oil lubrication, maintain the oil level at the center of the lowest needle roller. Regularly check the oil temperature ≤80℃.

Troubleshooting: Abnormal noise indicates a problem with the needle roller and journal fit; excessive temperature indicates a problem with lubrication and installation accuracy; immediately replace the bearing if needle roller wear/outer ring deformation is observed, and investigate journal wear and seat bore deformation.