Description
CAT 481-1699 34mm Inner Diameter Flange Sleeve Bearing
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CAT 481-1699 is a Caterpillar 34 mm inner diameter flanged sleeve bearing, suitable for use in the gearboxes, hydraulic pumps, or drive shafts of excavators and loaders. It provides radial positioning and self-lubricating support for low-speed, heavy-load applications. The following is professional structured information.
Core Technical Parameters (Professional Version)
Item Details
Basic Attributes Model 481-1699, Flange Sleeve Bearing (Self-Lubricating Composite Layer), Single Weight 0.32 kg, Quantity 1 per Unit, Material: Low Carbon Steel Backing + Bronze Sintered Layer + PTFE Self-Lubricating Film, Suitable for φ34 mm Shaft Diameter, Operating Temperature -40℃ to +120℃
Key Dimensions Inner Diameter φ34 mm (Tolerance +0.020/+0.040 mm), Outer Diameter φ50 mm (Tolerance -0.010/-0.030 mm), Bearing Length 45 mm, Flange Diameter φ65 mm, Flange Thickness 6 mm, Mounting Holes 3×φ8.5 mm (Evenly Distributed, Hole Spacing φ56 mm)
Material and Process Steel Backing Thickness 2.5 mm (Q235), Bronze Layer Thickness 1.5 mm (CuSn10Pb10), PTFE Film Thickness 0.05 mm (including MoS₂ filler), surface porosity 15%–20% (oil reservoir), flange surface flatness ≤0.1 mm, mounting hole chamfer C1.0 mm
Performance Parameters: Rated radial dynamic load 8 kN, static load 20 kN, coefficient of friction ≤0.08 (oilless start), PV value ≤1.2 MPa・m/s, limiting speed 300 rpm (oil lubrication)/150 rpm (dry lubrication), axial positioning load 5 kN
Compatible Models: Excavators 320GC/323GC, loaders 950M/966M, used for gearbox input shaft end, hydraulic pump drive shaft support, pilot pump flange positioning, compatible with Cat 5W-40 engine oil, M8×1.25 bolts (torque 18–22 N・m)
Installation and Maintenance Points: Clean the shaft diameter (Ra≤1.6 μm) and bearing housing bore (no burrs) before installation. (Scratches), the bearing and housing bore have a transition fit (H7/h6), press in using the cold fitting method (freeze at -20℃ for 1 h), and do not strike the flange face.
Positioning requirements: The flange face should be tightly against the bearing housing (clearance ≤0.05 mm), bolts should be tightened diagonally (in 2 stages, torque 18–22 N・m), axial preload ≤1 kN (avoid damage to the PTFE film).
Maintenance requirements: Check shaft end runout every 800 hours (≤0.2 mm). If the temperature rise exceeds 40℃ or there is abnormal noise, add 5W-40 machine oil (oil level to 1/3 of the bearing height). Do not wash the self-lubricating surface with water.
Troubleshooting: If the shaft diameter is worn (≥0.1 mm), replace the bearing and repair the shaft diameter (chrome plating/spraying); if the bearing is loose, check the housing bore wear (if out of tolerance, repair with a bushing).
