CAT 510-6430 Bearing – Needle(Debris Resistant)

CAT 510-6430 is a Caterpillar genuine double-row tapered roller bearing assembly (including inner and outer rings, roller cage, preload shims, and seals), compatible with the Cat 950M/962M loader gearbox secondary shaft and the 336D2 excavator swing gearbox input shaft. Its core function is to withstand bidirectional radial and axial combined loads, ensuring the positioning accuracy and operational stability of transmission components under heavy-duty conditions. The following is the professional technical information:

Core Technical Parameters (Professional Version)

Item Details Basic Attributes Model 510-6430, Type Double-row tapered roller bearing assembly (including inner and outer rings, roller cage, preload shims, nitrile rubber double-lip seals), compatible with Cat 950M/962M loader gearbox secondary shaft and 336D2 excavator swing gearbox input shaft, Material 52100 high-carbon chromium bearing steel (outer ring hardened HRC 60-64, inner ring HRC 58-62, rollers HRC… 62-66), outer diameter φ190 mm, inner diameter φ85 mm, total width 58 mm, single weight approximately 4.2 kg, rated radial load ≥380 kN, rated axial load ≥220 kN, operating temperature -40℃ to +120℃, limiting speed 2800 r/min (grease lubrication), sealing protection rating IP65. Key dimensions: outer ring outer diameter tolerance 0/-0.025 mm, inner ring inner diameter tolerance +0.015/-0.010 mm, total width tolerance ±0.15 mm, roller diameter φ14 mm, length 32 mm (double-row symmetrical distribution, row spacing 12 mm), preload gasket thickness 3.0 mm (tolerance ±0.02 mm, suitable for axial preload 5-8 kN), sealing lip inner diameter φ85 mm (interference 0.05-0.08 mm), mounting stop diameter φ175 mm. mm (positioning tolerance H7)

Material and Manufacturing Process: Material: 52100 bearing steel (tensile strength ≥2000 MPa, impact toughness ≥120 J/cm²), vacuum quenching + low-temperature tempering process, roller surface ultra-precision ground (Ra≤0.1 μm), cage is stamped low-carbon steel (with wear-resistant coating), preload shims are 65Mn spring steel (elastic modulus 206 GPa), seals are nitrile rubber (NBR 70 Shore A, mineral oil resistant/aging resistant)

Compatible Models: Cat 950M/962M loader (serial number KTT1000-UP) gearbox secondary shaft, 336D2 excavator (serial number JXE1500-UP) slewing gearbox input shaft, used to bear the bidirectional radial + axial composite load of the gearbox/reduction gearbox, suppress shaft movement, ensure transmission accuracy, suitable for heavy load and frequent start-stop conditions.

Assembly and Fit: The inner ring has an interference fit with the shaft (interference 0.012-0.020 mm), and the outer ring has a transition fit with the housing (clearance 0.005-0.010 mm). After the preload shim is installed, the bearing clearance is controlled at 0.02-0.04 mm. Use a special press to cold-press it into place during installation to avoid damaging the raceway with impact.

Installation and Maintenance Points: Before installation, clean the inner and outer rings, journal, and bearing bore in the housing. Check for cracks, pitting, and rust. Replace the seals and apply Cat-specific grease (2V lithium-based grease, filling 1/3-1/2 of the bearing’s internal space).

During assembly, first install the inner ring + roller assembly, then install the preload shim, and finally press in the outer ring and preload it using the end cap bolts (torque 180-220 N·m). Ensure the axial preload is sufficient to prevent excessive bearing clearance from causing vibration or insufficient clearance from causing overheating.

Maintenance recommendations: Check bearing temperature (≤80℃) and vibration value (≤2.5 mm/s) every 2000 hours. Replace immediately if abnormal noise, abnormal temperature rise or seal leakage occurs. Replenish grease regularly (every 800 hours, with a filling amount of about 0.2 kg each time).