CAT 567-7174 Single Row Tapered Roller Bearing

CAT 567-7174 is a Caterpillar single-row tapered roller bearing (outer ring/seat ring), suitable for Cat 950GC loader gearbox axle, 140M grader rear axle differential, 320D excavator slewing mechanism, and other transmission components. It is used in conjunction with the 567-7173 inner ring (with rollers and cage) and can carry radial and unidirectional axial loads. The following are the core technology and application information:

Core Technical Parameters

Item Details
Basic Attributes
Model 567-7174, type is single-row tapered roller bearing outer ring (seat ring), suitable for Cat 950GC loader gearbox axle, 140M grader rear axle differential, 320D excavator slewing bearing outer ring positioning, material is SAE 52100 high carbon chromium bearing steel (hardened HRC 60-64), surface anodized black, operating temperature -40℃ to + 120℃, single weight approximately 2.1 kg (4.63 lb), suitable for grease/oil lubrication, radial rated dynamic load ≥130 kN, radial rated static load ≥160 kN, axial load ≥50 kN

Key Dimensions: Inner diameter 170 mm (tolerance H7, +0.040/0 mm), outer diameter 220 mm (tolerance g6, -0.012/-0.038 mm), width 34 mm (tolerance ±0.15 mm), cone angle α=12°, large end face chamfer r2=2 mm, small end face chamfer r1=1 mm, end face runout ≤0.01 mm, roundness ≤0.005 mm

Material and Process: 52100 bearing steel forged blank, spheroidizing annealing → rough turning → finish turning → quenching (850-870℃ oil quenching) → tempering (180-200℃) → ultra-fine grinding (surface roughness…) Ra≤0.08 μm) → Oxidation blackening (film thickness 5-8 μm), raceway hardness HRC 60-64, matrix hardness HRC 58-62, raceway contact fatigue life ≥1000 hours. Compatible models: Cat 950GC/966K loader gearbox, 140M/160M grader rear axle differential, 320D/323D excavator swing mechanism, D6T bulldozer final drive. Matching inner ring model 567-7173. Suitable for C15 engine fan clutch bearing outer ring positioning, used for tapered roller bearing outer ring positioning, bearing radial and unidirectional axial loads.

Assembly fits 220 mm diameter bearing housing bore (tolerance H7, +0.040/0 mm), paired with 567-7173 inner ring. During installation, heat fitting (80-100℃, 10 minutes) to the bearing housing bore, cold fitting (-20℃)… (Heat to -30℃ for 30 minutes) until the bearing race fits snugly against the bearing housing bore without any gaps.

Installation and Maintenance Points:

Before installation, clean the bearing housing bore and bearing race. Check the raceway for cracks, rust, and scratches. The surface roughness Ra should be ≤0.08 μm, and the coaxiality error between the bearing race and the bearing housing bore should be ≤0.02 mm.

Hot-fitting the bearing race to the bearing housing bore: Immerse the bearing race in an 80-100℃ constant temperature oil bath for 10 minutes, then quickly insert it into the housing bore and position it using the end face locating ring.

Cold-fitting the bearing race to the bearing housing bore: Cool the bearing race in an environment of -20 to -30℃ for 30 minutes, then insert it into the housing bore, ensuring the end face of the bearing race fits snugly against the bearing housing bore step. Do not strike the end face of the bearing race.

Maintenance recommendations: Check the wear and fit of the raceway of the seat ring every 1500 hours. If the wear of the raceway exceeds 0.1 mm, or if peeling or cracks appear, replace it immediately. When replacing, it should be replaced at the same time as the inner ring (567-7173) to avoid damage caused by uneven load.