Description
CAT 8T-1176 BEARING
| CAT 8T-1176 BEARING |
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The CAT 8T-1176 is a Caterpillar original single-row tapered roller bearing, suitable for the gearbox output shaft or drive axle differential of Cat 950H, 966H, and other wheel loaders, used to withstand combined radial and bidirectional axial loads. The following is pure original data and does not include replacement parts information.
Core Technical Parameters (Raw Data)
Item Details
Basic Attributes
Model: 8T-1176; Type: Single-row tapered roller bearing (including inner ring, outer ring, rollers, and cage); Material: Inner/outer ring is high-carbon chromium bearing steel (GCr15, quenching hardness HRC60-64); Rollers are GCr15SiMn (quenching hardness HRC62-66); Cage is stamped steel plate (SPCC, galvanized surface); Weight: 2.35 kg; Suitable for heavy-load, impact-load, low-speed, high-torque applications; Operating temperature: -40℃ to +120℃; Lubrication: Oil lubrication (compatible with SAE 85W-90 gear oil); Protection rating: IP54; Accuracy class: P6 (ISO 492)
Key Dimensions
Inner diameter: d=85 mm (tolerance 0/-0.015 mm); Outer diameter: D=150 mm (tolerance 0/-0.018 mm); Width: B=37 mm (tolerance…) ±0.12 mm), 18 rollers, roller diameter φ14.5 mm, cone angle α=12°30′, inner ring large end diameter φ102 mm, outer ring small end diameter φ128 mm, fillet radius r=2.5 mm (tolerance ±0.2 mm), inner ring raceway surface roughness Ra≤0.4 μm, outer ring raceway surface roughness Ra≤0.4 μm
Performance Parameters: Basic rated dynamic load C=132 kN, basic rated static load C₀=165 kN, limiting speed 2800 rpm (oil lubrication), permissible axial load ≤80 kN, coefficient of friction ≤0.002 (oil lubrication condition), fatigue life ≥12000 hours (normal condition), compressive strength ≥2000 MPa, elastic modulus 207 GPa, linear expansion coefficient 11.5×10⁻⁶/℃
Structural and Performance Advantages: GCr15 Bearing steel material: After quenching, the inner/outer rings and rollers have high hardness, excellent wear resistance and fatigue resistance, making them suitable for long-term stable operation under heavy load conditions.
Single-row tapered structure: Can simultaneously withstand radial loads and bidirectional axial loads, suitable for components requiring combined load-bearing, such as gearbox output shafts and differentials.
Stamped steel cage: Robust structure, stably guides roller movement, prevents roller tilting and friction, and improves bearing running smoothness.
High precision P6 grade: Strict dimensional and geometric tolerances ensure the precision of the fit between the bearing, shaft, and bearing housing, reducing vibration and noise during operation.
Installation and Maintenance Points (Original Data)
Installation: Clean the journal and bearing housing bore (free from oil, rust, and impurities). The inner ring should have an interference fit with the shaft (0.010-0.020 mm), and the outer ring should have a transition fit with the bearing housing (0-0.015 mm clearance). Use a press to evenly press the bearing during installation (do not strike). After installation, control the axial clearance to 0.05-0.10 mm. Check the rotational flexibility after installation (no jamming or abnormal noise). Add SAE 85W-90 gear oil.
Maintenance: Check the bearing operating temperature every 1500 hours (normal ≤80℃; above this temperature requires investigation of lubrication or assembly issues). Check the gear oil level and cleanliness every 2000 hours (replace if contaminated). Check the bearing clearance every 5000 hours (replace if clearance >0.2 mm). Avoid overload operation (overloading can easily lead to roller fatigue damage). Prevent impurities from entering the bearing (accelerating raceway wear). Troubleshooting: Abnormal noise is often caused by insufficient lubrication, roller wear, or improper installation clearance. Replace the gear oil, adjust the clearance, or replace the bearing. Overheating is caused by lubrication failure or excessive tightness. Check the lubrication system and adjust the clearance. Excessive vibration is caused by bearing fatigue or misalignment. Replace the bearing and correct the installation accuracy.
