Double Row Self Aligning Ball Bearing Durable 1217 Bearing High Radial Load
1217 Self-aligning Ball Bearing: High Radial Load, Aligning & Durable for Machinery
Product Overview
The 1217 self-aligning ball bearing is a high-precision mechanical component designed to meet the operational demands of diverse machinery in complex and harsh conditions. As a key member of the self-aligning ball bearing series, it features specific dimensional parameters: an inner diameter (d) of 85mm, an outer diameter (D) of 150mm, and a width (B) of 28mm. These dimensions make it versatile for a wide range of applications where significant radial loads need to be managed effectively, and shaft misalignment issues may affect the stable operation of machinery.
Structural Design
Rolling Elements
The 1217 bearing is equipped with two rows of precisely manufactured spherical balls made from high-quality bearing steel, such as GCr15, known for its excellent hardness and superior wear-resistance. The production process follows strict quality control standards, ensuring each ball has a smooth surface and accurate dimensional precision. The spherical shape creates a larger contact area with the raceways, distributing the load evenly across bearing components and reducing the risk of local stress concentrations.
Raceways
The inner ring features a double-row raceway design, while the outer ring has a spherical raceway that enables the bearing's self-aligning function. Both raceways undergo advanced heat-treatment processes to achieve high surface hardness (HRC58-64 range), providing excellent wear-resistance and fatigue-resistance for extended service life.
Cage
A high-strength steel cage separates and guides the balls, preventing collisions during high-speed rotation. The precisely designed pockets hold balls securely, ensuring smooth and stable rolling. Advanced designs may include special coatings or additional heat-treatment to enhance strength, wear-resistance, and performance in harsh environments.
Performance Characteristics
Radial Load-Carrying Capacity
Primarily designed to bear substantial radial loads, the double-row ball configuration and large contact area allow it to withstand significant radial forces. Suitable for medium-to-heavy radial load applications in motors, conveyors, industrial gearboxes, and manufacturing equipment.
Limited Axial Load-Carrying Ability
While mainly intended for radial loads, it can handle small axial loads in either direction. The rib structure and ball arrangement enable resistance to limited axial thrust, providing flexibility in handling complex load situations.
Exceptional Self-Aligning Capability
The spherical outer-ring raceway allows automatic adaptation to misalignment between shaft and housing within approximately 2°-4°. This capability is vital in applications with shaft deflection or misalignment, reducing stress concentrations and preventing premature failure.
High-Speed Rotation Adaptability
Designed to operate smoothly and efficiently at relatively high speeds, with optimized rolling elements, raceways, and cage design resulting in low friction and reduced vibration. Performance is maintained under demanding high-speed conditions with proper lubrication.
Application Fields
Industrial Machinery
Widely used in large-scale industrial motors, conveyor systems, and industrial gearboxes where reliable radial load support and misalignment compensation are crucial for smooth operation.
Agricultural Machinery
Well-suited for harsh environments with significant vibrations and potential misalignment in tractors, combine harvesters, and other agricultural equipment operating on uneven terrain.
Textile Machinery
Commonly used in spinning frames and looms where precise, smooth operation at relatively high speeds is required, with self-aligning properties maintaining accuracy and efficiency.
Woodworking Machinery
Adapted for sawmills and wood lathes experiencing substantial radial loads and vibrations, ensuring long-term reliable operation in demanding woodworking environments.
Dimensions and Specifications
| Dimension Type |
Value |
| Inner Diameter (d) |
85mm |
| Outer Diameter (D) |
150mm |
| Width (B) |
28mm |
Maintenance Points
Lubrication Management
Proper lubrication is essential for optimal performance and extended service life. Use high-quality lithium-based grease for general applications, or synthetic greases/oil-based lubricants for high-temperature environments (above 120°C) or heavy loads. Apply lubricant to fill about one-third to one-half of the bearing's internal space, with regular replenishment based on operating conditions.
Regular Inspection
Periodic visual inspections for cracks, corrosion, or abnormal wear, combined with vibration and temperature monitoring, help detect early signs of issues. Prompt repairs or replacements prevent further damage.
Installation Precautions
Maintain a clean working environment and use specialized tools to prevent damage. Ensure proper fit with interference fit for the inner ring and shaft, and clearance fit for the outer ring in the housing. Proper alignment with shaft and housing is critical for optimal performance.
Storage Considerations
Store in clean, dry, well-ventilated areas protected from moisture, corrosive gases, and extreme temperatures. Keep in original packaging or anti-rust paper, store horizontally to avoid uneven stress, and conduct regular condition checks.
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