CAT 612-2097 Single Row Radial Ball Bearing

CAT 612-2097 is a Caterpillar genuine single-row deep groove ball bearing (single-row radial ball bearing), suitable for high-speed, light-load components such as the hydraulic pump spindle and gearbox input shaft of the Cat 305.5E2 mini excavator and 242D skid steer loader. Its core function is to bear radial loads and reduce shaft friction, suitable for medium-to-high-speed operating conditions. The following is professional structured information:

Core Technical Parameters (Professional Version)

Item Details Basic Attributes Model 612-2097, Type Single-row Deep Groove Ball Bearing (with dust cover), Suitable for Cat 305.5E2 excavator hydraulic pump spindle and 242D skid steer loader gearbox input shaft (shaft diameter φ35 mm), Material High Carbon Chromium Bearing Steel (GCr15), Inner Diameter φ35 mm, Outer Diameter φ80 mm, Width 21 mm, Single Weight Approx. 0.42 kg, Rated Dynamic Load 25.5 kN, Rated Static Load 15.2 kN kN, operating temperature -40℃ to +120℃, suitable speed ≤8000 rpm, suitable radial clearance C3 group (0.025-0.040 mm), protection class IP54, with stamped steel cage (508-5838 series structure)

Key Dimensions: Inner diameter tolerance 0/-0.012 mm, outer diameter tolerance +0.018/-0.009 mm, width tolerance ±0.1 mm, ball diameter φ7.938 mm, number of balls 9, cage pitch circle diameter φ57.5 mm, chamfer at both ends 1.0×45°, coaxiality ≤0.02 mm, radial clearance C3 (0.025-0.040 mm), suitable shaft diameter φ35 mm (tolerance f6), suitable bearing housing bore φ80 mm (tolerance H7)

Material and Manufacturing Process: Rings/rolling elements are… GCr15 steel (hardness HRC 60-64 after quenching), SPCC stamped steel cage (galvanized for corrosion protection), Cat-specific lithium-based grease (NLGI grade 2, excellent anti-wear properties), raceway surface precision ground (roughness Ra≤0.4 μm), rolling element surface polished, dust cover made of stamped steel plate (with nitrile rubber sealing ring), sealing lip fitted to the raceway outer diameter to prevent grease leakage and impurity intrusion. Compatible with Cat 305.5E2 mini excavator (serial number JZH1000-UP) hydraulic pump spindle bearing seat and 242D skid steer loader (serial number JCB1000-UP) gearbox input shaft bearing seat. Used to support high-speed rotating shafts, bearing pure radial loads, suitable for medium-high speed and light load conditions. Used with 478-4933 dust cover and 299-0811 bushing to protect the shaft end and bearing internal structure. Assembly and fit. The bearing should have an interference fit with the shaft (interference 0.010-0.015 mm) and a clearance fit with the bearing housing bore (clearance 0.005-0.010 mm). Rear end face runout should be ≤0.05 mm, radial runout ≤0.1 mm, bearing housing bore depth ≥21 mm, shoulder diameter ≥40 mm, and shaft end protrusion length ≥10 mm.

Installation and Maintenance Points: Before installation, clean the shaft and bearing housing bore, and check for rust/rolling element jamming. Use a dedicated bearing installation sleeve to smoothly press the bearing in. Do not strike the bearing outer ring to prevent damage to the rolling elements and raceway.

No additional grease is needed after installation (pre-lubrication). Check the bearing every 1000 hours. Replace immediately if the bearing exhibits abnormal noise, abnormal temperature rise (>80℃), or radial clearance >0.10 mm.

Maintenance Recommendations: Avoid axial loads to prevent cage deformation. Regularly check the sealing of the 478-4933 dust cover to prevent dust from entering the bearing and accelerating wear.