CAT 586-6825 76.2mm Inner Diameter Cone Bearing

CAT 586-6825 YM is a Caterpillar original single-row tapered roller bearing inner ring (raceway ring), suitable for heavy-duty transmission components such as gearboxes and drive axles. The following is purely accurate information (without additional description):

Core Parameters and Information

Item Details
Part Model: CAT 586-6825 (5866825) YM Tapered Roller Bearing Inner Ring (Range Ring)

Part Type: Single-row tapered roller bearing inner ring, suitable for matching corresponding outer rings and roller assemblies, bearing radial + unidirectional axial loads, used in medium-to-high speed rotating conditions

Material: SAE 52100 high-carbon chromium bearing steel, quenching hardness HRC60-64, raceway surface roughness Ra≤0.08μm, cone contact angle 10°15′

Key Dimensions: Inner diameter 63.50mm, outer diameter 95.25mm, total width 25.40mm, large end diameter of cone 95.25mm, small end diameter 63.50mm diameter, chamfer 1.0×45°
Structural Features: Single-edge design, inner ring tapered surface contacts the roller line, suitable for 63.50mm diameter journals, clearance 0.012-0.025mm
Compatible Structure: Journal fit tolerance k5, forms a complete bearing with outer ring (e.g., CAT 586-6829) and roller cage (CAT 586-6830), operating temperature -40℃ to +120℃, rated dynamic load 85kN, rated static load 105kN
Lubrication Requirements: Oil lubrication, recommended CAT 9X-2010 transmission oil, oil level submerged to the lowest roller center of the inner ring, oil change every 2000 working hours
Compatible Machines and Assemblies:
Excavators: CAT 320D2, 323F, 326GC (slewing gearbox input shaft, travel drive axle main reducer)
Loaders: CAT 930M, 938M (Transmission Shaft 1, Front Drive Axle Differential)

Compatible Assemblies: 320D2 rotary gearbox input shaft bearing assembly, 930M transmission shaft 1 bearing assembly

Matching Parts: 586-6825 inner ring, 586-6829 outer ring, 586-6830 roller cage, 8T-4125 shaft retaining ring, 161-8220 sealing ring

Installation and Fitting Points: Clean the journal, inner ring, and mating parts, ensuring they are free of metal shavings and oil stains; heat-fit (heat the inner ring to 80-100℃) during installation; avoid striking the tapered surface and flange to prevent deformation.

Journal fit tolerance k5, inner ring and journal interference 0.010-0.018mm, rear end face fit without gap, shaft rotation without jamming, radial clearance 0.012-0.025mm.

When assembling with the corresponding outer ring and roller assembly, ensure that the rollers and inner ring tapered surfaces fit evenly and the contact marks are centered.

Use a dedicated puller for disassembly to avoid damaging the journal and inner ring raceway. When replacing, check that the journal wear is ≤0.05mm; if it exceeds this tolerance, replace the journal or the entire shaft assembly.