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70020 XCMG GR2605 motor grader bearing
- Model: 70020 (7020)
- Type: Single-row angular contact ball bearing
- Contact Angle: 15° (Type C)/25° (Type AC)/30° (Type B)
- Bore (d): 100mm
- Outer Diameter (D): 150mm
- Width (B): 24mm
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Product Details:
70020 XCMG GR2605 motor grader bearing
70020 is a single-row angular contact ball bearing, a core supporting component for construction machinery, precision transmission and high-speed rotating equipment. It can withstand both radial and unidirectional axial loads, featuring high speed, high precision, good rigidity, wear resistance and fatigue resistance. It is usually installed in pairs to offset axial component force and improve stability. Made of high-purity GCr15 bearing steel with precision heat treatment and superfinishing, it adapts to heavy-duty, high-speed and high-precision positioning conditions.
Technical Parameters
- Model: 70020 (7020)
- Type: Single-row angular contact ball bearing
- Contact Angle: 15° (Type C)/25° (Type AC)/30° (Type B)
- Bore (d): 100mm
- Outer Diameter (D): 150mm
- Width (B): 24mm
- Material: GCr15 high-carbon chromium bearing steel
- Cage: Phenolic resin, nylon, brass (optional)
- Precision Grade: P0 (Normal), P6, P5, P4 (Precision)
- Basic Dynamic Load Rating (Cr): Approx. 112kN
- Basic Static Load Rating (C0r): Approx. 150kN
- Limiting Speed: Grease lubrication ≈3800r/min; Oil lubrication ≈5000r/min
- Operating Temperature: -30℃～120℃
Application Scenarios
Suitable for transmission main shafts, differentials, hydraulic pumps/motors and traveling mechanisms of construction machinery such as loaders, graders, rollers and forklifts; also used in precision machine tool spindles, high-speed motors, gearboxes, vacuum pumps and photovoltaic equipment. Installed between shaft and housing, paired to bear bidirectional axial force, ensuring rotation accuracy and transmission stability.
Common Faults & Troubleshooting
- Abnormal heating and speed reduction: Caused by insufficient lubrication, grease deterioration or excessive preload. Replenish/replace special grease and adjust preload.
- Abnormal noise and vibration: Resulted from raceway spalling, ball wear or foreign matter intrusion. Replace 70020 bearing and clean mounting position.
- Axial movement and reduced precision: Caused by bearing wear, excessive clearance or installation eccentricity. Replace new bearing and correct coaxiality.
- Rust and seizure: Due to seal failure, moisture/foreign matter entry. Replace bearing and upgrade sealing structure (e.g., double-lip seal).
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1 3327693 adjusting nut
2 72293 bearings
3 71860 Elastic Pin
4 70850 bolt M18 × 1.5 × 60
5 73586 bolt M10 × 1.25 × 10 BOLT
6 3475573 protective cover
7 3328363 driven helical gear
8 3289373 Sun gear gasket
9 3121153 Sun Wheel
10 3454063 Cross axis
11 3121163 planetary gears
12 3289363 planetary gear gasket
13 3310583 Sun Wheel
14 3310653 Sun gear gasket
15 3137973 driven plate
16 3310433 active film
17 3310593 piston
18 3310683 bolt M12 × 185
19 3328083 bolt
20 70020 bearings
21 3327713 Spring
22 3327703 adjusting nut
*For other spare parts procurement needs, please contact us!
