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1228 Self Aligning Bearing Heavy Machinery Bearing 140x250x52
1228 Self Aligning Bearing Heavy Machinery Bearing 140x250x52
1228 Self Aligning Bearing Heavy Machinery Bearing 140x250x52
1228 Self Aligning Bearing Heavy Machinery Bearing 140x250x52
1228 Self Aligning Bearing Heavy Machinery Bearing 140x250x52
1228 Self Aligning Bearing Heavy Machinery Bearing 140x250x52
Specifications
Outer Diameter :
250 mm
Place of Origin :
CHINA
Type :
Self Aligning Ball Bearing
Width :
52mm
Delivery Time :
5-8 work days
Bore :
140 mm
MOQ :
1
Model :
Customizable
Brand Name :
Kesle
Payment Terms :
T/T,Western Union,MoneyGram,PayPal
Bearing Material :
Bearing Steel GCr15
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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1228 Self Aligning Bearing Heavy Machinery Bearing 140x250x52

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Product Detail
Outer Diameter :
250 mm
Place of Origin :
CHINA
Type :
Self Aligning Ball Bearing
Width :
52mm
Delivery Time :
5-8 work days
Bore :
140 mm
Contact Supplier
1228 Self Aligning Bearing Heavy Machinery Bearing 140x250x52
1228 Self Aligning Bearing Heavy Machinery Bearing 140x250x52
1228 Self Aligning Bearing Heavy Machinery Bearing 140x250x52

Dongguan Kesle Electronic Hardware Co., Ltd

Verified Supplier
1 Years
guangdong, dongguan
Business Type :
Manufacturer, Distributor/Wholesaler, Agent, Importer, Exporter, Trading Company, Seller, Other
Main Products :
Industrial Ball Bearings, Excavator Bearings, Angular Contact Ball Bearings
Total Annual :
10000000-20000000
Employee Number :
50~80
Certification Level :
Verified Supplier
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