CAT 485-1210 91mm Outside Diameter Straight Sleeve Bearing

CAT 485-1210 is a Caterpillar straight steel sleeve bearing (bushing) suitable for medium to light load swinging parts such as the boom/rocker arm hinge of the Cat 950GC loader, the stick pin of the 320D excavator, and the blade pivot of the 140M grader. It is used to reduce rotational/swinging friction and wear. The following are the core technology and application information:

Core Technical Parameters
Item Details
Basic Attributes
Model 485-1210, type is straight sleeve bearing (bushing), suitable for the boom/rocker arm pivot of the Cat 950GC loader, the stick hinge of the 320D excavator, and the blade connecting pin of the 140M grader; material is low carbon steel (surface hardened HRC 50-55); operating temperature -40℃ to +120℃; single weight approximately 0.25 kg; suitable for grease lubrication; rated radial load ≥18 kN; static load ≥45 kN. kN, wear life ≥3000 hours, no internal or external lubrication grooves and cross-shaped hole Cat® Parts

Key Dimensions: Inner diameter 79.99 mm (3.15 in, tolerance H7, +0.030/0 mm), outer diameter 90.93 mm (3.58 in, tolerance g6, -0.015/-0.030 mm), total length 23.11 mm (0.91 in, tolerance ±0.15 mm), wall thickness 5.47 mm, chamfer at both ends r=0.8 mm, inner hole roughness Ra≤1.6 μm, no flange, no internal or external grooves, compatible with Cat® Parts without oil groove pins

Material and Process: Low carbon steel base material → integral quenching → tempering → precision machining of inner and outer diameters → deburring → cleaning and rust prevention, surface hardening treatment to improve wear resistance, suitable for medium and low speed (≤3 m/s), medium and light load oscillating/rotating conditions, resistant to impact and vibration

Compatible Models 320D/323D excavator boom/swing pin, 950GC/966K loader rocker arm/swing pivot, 140M/160M grader blade connecting pin, 420D/432D skid steer loader working device pin, used for swing support at hinged parts, reducing wear between the pin and the frame.

Assembly Fit: Compatible with 79.99 mm diameter pins (tolerance f7, -0.030/-0.060 mm), 90.93 mm diameter mounting holes (tolerance H7, +0.030/0 mm), interference fit 0.015-0.030 mm, press-fit installation, welding or heating deformation is prohibited.

Installation and Maintenance Points: Clean the pins and mounting holes before installation. Check the bearing inner hole for scratches and bulges. Measure the inner diameter of the mounting hole and the outer diameter of the bearing to ensure an interference fit of 0.015-0.030 mm. Surface roughness of the hole should be… Ra≤1.6 μm.

Use a hydraulic press to vertically press the bearing into the mounting hole, with a pressing force ≤50 kN. Ensure the bearing end face fits snugly against the mounting hole step without misalignment. After pressing, check the inner hole roundness to be ≤0.02 mm. Do not directly strike the bearing outer ring with a hammer.

Maintenance Recommendations: Check the bearing clearance every 1500 hours. If the radial clearance is >0.25 mm or abnormal noise or overheating occurs, replace immediately. Routinely apply lithium-based grease (NLGI 2) according to the equipment manual, replenishing grease every 300 hours, adding only enough to overflow a small amount of new grease each time.