CAT 434-5016 Bearing – Cone(Debris Resistant)

CAT 434-5016 is a Caterpillar needle roller bearing inner ring with anti-chip labyrinth and contact lip, suitable for Cat 320D2/323D2 excavator swing gearboxes and 966M loader drive shafts. It is designed for enhanced sealing and radial load bearing in harsh conditions. The following is professional structured information.

Core Parameters (Professional Version)

Project Details
Basic Attributes
Model 434-5016, 2 pieces per unit, for 191-2514 anti-chip needle roller bearing inner ring, anti-chip labyrinth + contact lip structure, suitable for high-pollution working conditions, compact spaces, heavy radial loads (no significant axial load)

Key Dimensions
Inner diameter 35 mm (tolerance m6: +0.020–+0.035 mm), outer diameter 48 mm (tolerance g6: -0.009–-0.025 mm), width 25 mm, anti-chip lip outer diameter 50 mm (interference 0.1–0.2 mm), lip thickness 1.2 mm, inner ring thickness 2.8 mm, raceway diameter 48 mm, raceway roughness Ra≤0.4 μm, positioning chamfer C0.8×45°

Material and Process
Material 52100 bearing steel (quenched) HRC60–64, hard chrome plated (film thickness 5–8 μm, hardness HV900–1000), chip-resistant lip made of nitrile rubber (NBR 70 Shore A), raceway ultra-precision ground (roundness ≤0.002 mm), both end faces precision ground (flatness ≤0.005 mm)

Performance Parameters: Rated dynamic load ≥38 kN, rated static load ≥52 kN, grease lubrication limiting speed 4200 rpm, oil lubrication limiting speed 7800 rpm, operating temperature -30℃ to +100℃, radial clearance 0.012–0.030 mm, chip-resistant rating IP65 (with outer ring lip)

Compatible Models: Cat 320D2/323D2 excavator slewing gearbox planetary carrier support, 966M loader drive shaft intermediate support, matching outer ring 191-2514, matching shaft diameter 35 mm (tolerance m6), bearing housing bore 55 mm (Tolerance H7)
Anti-Chip Debris Structure and Installation/Maintenance Points

Anti-Chip Debris Design: The inner ring integrates a labyrinth groove and a contact lip, forming a double seal with the outer ring lip to prevent sand/metal debris from entering the raceway, suitable for harsh working conditions such as mining/construction waste.

Installation Specifications: Cold press installation (press head against the inner ring end face), shaft surface roughness Ra≤1.6 μm, press-in force controlled at 4–6 kN to avoid lip damage. After installation, the inner ring end face runout ≤0.03 mm.

Lubrication Maintenance: Use Cat MTO-1000 extreme pressure lithium-based grease, filling to 1/3 of the bearing cavity volume, replenishing lubrication every 800 hours, shortening to 400 hours for high-contamination conditions.

Fault Warning: Check bearing clearance (radial clearance >0.1 mm) or abnormal noise every 1500 hours. If lip damage/raceway wear is found, replace immediately to prevent debris from entering and causing bearing seizure.