1228 Self Aligning Bearing Heavy Machinery Bearing 140x250x52
Price:
Negotiable
MOQ:
1
Delivery Time:
5-8 work days
Brand:
Kesle
Product Description
1228 Self Aligning Bearing - Heavy Machinery Bearing 140x250x52
The 1228 bearing is a reliable self-aligning ball bearing designed for heavy machinery applications. With its unique spherical raceway design and double-row rolling element structure, it offers excellent self-aligning capability and load-carrying performance in industrial transmission systems.
Product Structural Design
Rolling Elements and Raceways: Features two rows of high-precision steel balls with surface roughness as low as Ra0.02μm and roundness error controlled within 1μm. The inner ring has a double-groove structure while the outer ring raceway is spherical, enabling automatic compensation for angular deviations up to 3°.
Cage: Constructed from high-quality low-carbon steel plates with optional nylon cages (PA66 + 30% glass fiber) for enhanced corrosion resistance and self-lubrication in humid environments.
Key Product Parameters
| Parameter Category | Specific Parameter | Value |
|---|---|---|
| Dimensional Parameters | Inner Diameter | 140mm |
| Outer Diameter | 250mm | |
| Thickness | 52mm | |
| Load Parameters | Basic Dynamic Radial Load Rating | 160kN |
| Basic Static Radial Load Rating | 78.5kN | |
| Axial Load Capacity | Bidirectional (approx. 1/3 of radial load) | |
| Speed Parameters | Limiting Speed (grease lubrication) | 2400r/min |
| Limiting Speed (oil lubrication) | 3000r/min | |
| Material Parameters | Material of Inner/Outer Rings and Steel Balls | High-carbon chromium bearing steel (GCr15), HRC60-65 |
| Cage Material | Steel plate (SPCC) or reinforced nylon | |
| Fit and Clearance | Recommended Shaft Tolerance | m6 |
| Recommended Bearing Housing Bore Tolerance | J7 | |
| Radial Clearance (basic group) | 130-280μm | |
| Temperature Range | Applicable Temperature | -30℃ to +120℃ |
Material Selection
- Bearing Steel: High-carbon chromium bearing steel (GCr15) with hardness HRC60-65 after heat treatment, providing excellent wear resistance and contact fatigue strength.
- Cage: Steel plate cages for dry/normal temperature environments; nylon cages for humid conditions (>80% humidity) with better corrosion resistance and suitability for medium-high speed applications.
Performance Advantages
- Super Strong Self-Aligning Ability: Compensates for angular deviations up to 3°, extending service life by over 30% in deflection-prone equipment.
- High Radial Load-Carrying Capacity: 50% higher than single-row bearings of same size, ideal for heavy-load equipment.
- Low Vibration and Low Noise: Vibration velocity level ≤28dB, suitable for noise-sensitive applications.
- Strong Environmental Adaptability: Supports various sealing forms with IP54 protection for dusty and humid environments.
Application Fields
- Heavy Industry Equipment: Rolling mill roller tables, crane slewing mechanisms, mining crushers
- General Machinery: Large fans, water pumps, reducers transmission shafts
- Textile and Papermaking: Textile machine spindles, papermaking machine press rolls
- Shipbuilding and Metallurgy: Ship propulsion systems, metallurgical continuous casters
Installation and Maintenance Points
Installation Points:
- Clean journal and bearing housing bore (surface roughness ≤Ra1.6μm)
- Use temperature difference method: heat bearing to 80-100℃ or cool shaft to -20~-30℃
- Check axial movement: 0.1-0.3mm after installation
Lubrication Points:
- Conventional: NLGI Grade 2 lithium-based grease (1/3-1/2 filling)
- High-temperature (>100℃): Polyurea-based grease
- Oil lubrication: ISO VG46-68, 0.1-0.3MPa pressure
Maintenance Points:
- Check lubrication every 1000 hours (500 hours in dusty environments)
- Monitor with vibration detector (stop if acceleration >2.5g)
- Use rain shields for outdoor equipment
With its excellent self-aligning performance, high load-carrying capacity, and wide environmental adaptability, the 1228 bearing provides solid guarantee for stable and efficient operation of large mechanical transmission systems.
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Company
Dongguan Kesle Electronic Hardware Co., Ltd
Location
Guangdong Dongguan Kesile Electronic & Hardware Products Factory
Contact Person
orlenda li