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Ball bearings

SKF ball bearings are a type of rolling bearing mainly composed of balls, inner rings, outer rings, and retainers (also known as cages). Ball bearings can withstand large loads and, due to their structural characteristics, have low rotational friction resistance, thus maintaining low friction temperatures at high speeds

Background of SKF Company

The full name of SKF is Svenska Kullager Fabriken, and its Chinese transliteration is SKF. The company was founded in 1907 and is headquartered in Gothenburg, Sweden. SKF is a leader in bearing technology and manufacturing, with operations in over 130 countries worldwide, producing over 500 million bearings annually, and a global sales network

SKF Group is continuously committed to the research and development of the bearing industry, with an average of one new patent issued every two days, and is the first bearing company to pass ISO14001 environmental certification

application area

SKF ball bearings are widely used in various industrial fields, including the steel industry, papermaking, cement, plastics, and various OEM manufacturers. In addition, SKF also provides cutting-edge simulation systems, consulting services, equipment efficiency services, and the most advanced supply management technology in the bearing industry to help users improve their overall production capacity

news

SKF continuously launches innovative bearing products and technological solutions to meet the needs of different industries and applications. For example, SKF ball bearing units with composite material bearing seats have high cost-effectiveness and are particularly suitable for applications with high speeds, medium loads, high reliability requirements, and minimum maintenance needs

SKF Ball Bearings are precision-engineered solutions designed to deliver high performance, reliability, and efficiency across diverse industrial and commercial applications. Utilizing advanced material science and manufacturing technologies, these bearings excel in handling radial and axial loads while minimizing friction and energy loss. SKF’s ball bearings are widely used in automotive systems, electric motors, industrial machinery, and consumer appliances.

Key Technical Specifications

Design Features

Bearing types:

Deep Groove Ball Bearings: Versatile for radial and moderate axial loads

Angular Contact Ball Bearings: Optimized for combined radial/axial loads and high-speed operation

Thrust Ball Bearings: Specialized for unidirectional axial loads

Self-Aligning Ball Bearings: Compensate for shaft misalignment (up to 3°)

Sealing/Shielding Options:

RS1/RSH (Rubber Seals): IP65-rated dust/water resistance

ZZ/2Z (Metal Shields): Non-contact protection for high-speed applications

Internal Geometry:

Optimized raceway curvature for reduced stress concentration

Precision-grade balls (Grade 10/5) with controlled sphericity (≤ 0.1 μm deviation)

Performance Characteristics

Load Capacity:

Dynamic Radial Load: Up to 85 kN (e.g., 6316 Deep Groove Bearing)

Static Radial Load: Up to 45 kN

Axial Load: Up to 50% of radial capacity (angular contact designs)

Speed Limits:

Grease-Lubricated: Maximum DN value of 500,000

Oil-Lubricated: DN ≤ 750,000

Operating Temperature:

Standard Range: -40°C to +120°C

High-Temperature Models: Up to +200°C (special cages/lubricants)

Friction Coefficient: As low as 0.0015 (SKF Energy Efficient models)

Product Line Variants

  1. Deep Groove Ball Bearings

Standard Series (6000/6200/6300): General-purpose applications

SKF Explorer®: Enhanced load capacity and service life (20–30% improvement)

Solid Oil®: Polymer-filled lubrication for maintenance-free operation

  1. Angular Contact Ball Bearings

Single-Row (7200/7300): Machine tool spindles, pumps

Double-Row (5200/5300): Higher rigidity for gearboxes

Hybrid Ceramic (HCB): Silicon nitride balls for electric vehicles and high-speed CNC

  1. Thrust Ball Bearings

Single-Direction (511/512): Automotive clutches, crane hooks

Double-Direction (522/523): Precision positioning systems

  1. Specialty Bearings

Stainless Steel (VA201): Corrosion-resistant for food/pharmaceutical industries

Insulated (INSOCOAT™): Electrically insulated for electric motors

Sensitized (SKF Insight®): Integrated vibration/temperature sensors

Material Technology

Rings/Balls:

Standard: Ultra-clean high-carbon chromium steel (SAE 52100)

High-Performance: SKF Explorer® steel with carbide uniformity (ISO 683-17)

Ceramic: Si3N4 balls (non-conductive, 60% lighter than steel)

Cages:

Glass fiber-reinforced poly-amide (PA66) for reduced inertia

Machined brass (high-speed stability)

Surface Treatments:

SKF No-wear®: Diamond-like carbon coating (DLC) for 8x longer wear life

Phosphate Coating: Improved run-in performance

Competitive Advantages

  1. Precision Engineering
  2. ABEC 5/7/9 Tolerance Classes: Radial runout as low as 2 μm

Low Noise Levels: < 15 dB(A) in electric motor applications

  1. Lubrication Innovation

Grease Lifetime: Up to 30,000 hours (SKF LGHP 2/3)

Oil Bath/Oil Mist Compatibility: For extreme temperature or vacuum environments

  1. Energy Efficiency

SKF E2/Energy Efficient Designs: Reduce friction torque by 30–50%

Lightweight Hybrid Bearings: Lower rotating mass for energy savings

  1. Smart Integration

SKF EnLight™: Edge-computing sensors for predictive maintenance

Wireless Condition Monitoring: Real-time data via SKF Rotating Equipment Performance (REP)

This technical profile underscores SKF Ball Bearings as the premier choice for engineers seeking precision, durability, and energy efficiency. Their cutting-edge designs and smart technology integration make them indispensable for modern industrial and consumer applications.

 

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Sphered seat washers
SKF Sphered Seat Washers are precision-engineered components designed to optimize the performance of self-aligning bearings by compensating for shaft misalignment and housing inaccuracies. These specialized washers feature a spherical (sphered) seating surface that interfaces with the bearing’s outer ring, enabling smooth angular adjustments and reducing stress concentrations in demanding applications. Ideal for use with spherical roller bearings or self-aligning ball bearings, SKF’s sphered seat washers enhance load distribution, extend bearing life, and simplify installation in machinery operating under dynamic or misaligned conditions.
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Thrust ball bearings
‌SKF Thrust Ball Bearings‌ are bearings designed specifically to withstand axial loads and are typically used in applications that require high load carrying capacity and good lubrication performance. The following is a detailed description of SKF Thrust Ball Bearings: Design and Function SKF Thrust Ball Bearings consist of one or more balls and one or two annular raceways. These bearings are generally divided into two types: single-direction and double-direction:
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Self-aligning ball bearings
‌SKF self-aligning ball bearings are bearings with automatic centering function, suitable for situations where there is center offset between the shaft and the bearing seat or shaft bending. ‌ Structural features The outer ring of the SKF self-aligning ball bearing has two raceways and is spherical, allowing the inner ring and the steel ball group to be automatically aligned. The inner ring has a raceway that matches the two raceways of the outer ring. The steel balls roll between the inner and outer rings to reduce friction. The cage evenly separates the steel balls to prevent them from contacting each other and ensure smooth operation.
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Angular contact ball bearings
SKF Explorer Series angular contact ball bearings are designed to maximize the effects of lubrication and minimize the effects of friction, wear and contamination. These bearings are able to provide an average of three times longer service life under poor lubrication and contamination conditions. They are particularly suitable for pump and compressor applications. Every component of the SKF Explorer Series angular contact ball bearings has been redesigned to improve temperature stability, reduce failures caused by contamination, and increase bearing service life under poor lubrication conditions. Angular contact ball bearings are designed to accommodate radial and axial loads acting simultaneously. The raceways of the inner and outer rings move relative to each other in the direction of the bearing axis. The axial load carrying capacity of the bearing increases with the increase in the contact
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Deep groove ball bearings
SKF Deep Groove Ball Bearings are an important part of the SKF product range, with a wide range of applications and significant features. The following is a detailed description of SKF deep groove ball bearings: Basic characteristics Deep groove ball bearings are uniquely designed to withstand radial loads and certain axial loads. Their low friction and high rotation speed characteristics make them excellent in applications that require high speeds and low noise. In addition, deep groove ball bearings are easy to install and disassemble, have low maintenance costs, and are suitable for various harsh environments.
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  • NOKS INTERNATIONAL TRADE GROUP LIMITED.
  • Email : info@noksbearings.com


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