629 Deep Groove Ball Bearings
| 629 Deep Groove Ball Bearings | |||
|---|---|---|---|
| Part Number | 629 | Ball Number | 7 |
| d | 9 | Ball Size | 4.762 |
| D1 | 26 | Dynamic Load Co(N) | 5050 |
| B | 8 | Static Load Cor(N) | 1970 |
| R | 0.3 | Grease Speed | 27000 |
| Weight(Kg) | 0.018 | Oil Speed | 33000 |
629 Deep Groove Ball Bearing | Open, ZZ, 2RS High-Speed Mini Bearings
The 629 deep groove ball bearing is a high-precision miniature light-duty component in the 620 series, featuring optimized internal raceway geometry and refined rolling element arrangement. Designed for compact mechanical systems, this single-row ball bearing delivers low-friction, ultra-quiet and stable high-speed rotation with improved load capacity and structural stability compared to smaller micro bearings. It is widely used for precision micro transmission and lightweight motion applications. The 629 series is available in three standard configurations: open type, 629ZZ double metal shield type and 629-2RS double rubber sealed type. With five industrial-grade material options, it adapts perfectly to economic, sanitary, high-wear and corrosive working environments for diverse miniature precision equipment.
629 Open / ZZ / 2RS Structural Features
629 Open Type: The unsealed open structure provides unobstructed airflow and efficient heat dissipation during continuous high-speed operation. It allows easy grease replenishment and routine cleaning without creating extra rotational resistance. Ideal for clean, dry indoor workshops and fully enclosed precision micro machinery, it maintains stable dimensional accuracy and consistent performance during long-cycle light-load operation.
629ZZ Double Metal Shields: Equipped with dual-sided non-contact steel shields, this dust-proof bearing effectively blocks fine dry dust, floating micro particles and workshop debris. The non-contact design preserves original high-speed precision and smooth rotation without increasing friction. Featuring reliable durability and excellent cost efficiency, it is widely adopted in dry micro automation systems, small motors, precision electronics and general miniature transmission devices.
629-2RS Double Rubber Seals: This fully sealed variant uses double-sided contact rubber seals to isolate moisture, oil mist, splash water and corrosive fine dust. It securely locks internal lubricating grease to prevent leakage and aging, enabling long-term maintenance-free operation. It is the ideal solution for humid, dusty and mild outdoor working conditions for miniature precision equipment.
629 Bearing Material Performance
Carbon Steel: High cost-performance industrial material with uniform hardness and outstanding anti-fatigue properties. It delivers stable wear resistance and smooth high-speed operation for standard light-load miniature machinery, suitable for mass consumer electronics and general industrial applications.
304 Stainless Steel: Food-grade stainless steel with excellent oxidation and rust resistance. It prevents precision degradation and surface corrosion in humid and open environments, perfect for food processing mini devices, light industry and daily precision equipment.
316 Stainless Steel: Premium marine-grade corrosion-resistant material with strong tolerance to acid, alkali and salt spray. It resists mild chemical erosion and coastal high humidity, ideal for sanitary instruments, marine micro devices and light chemical precision equipment.
420 Stainless Steel: High-toughness martensitic stainless steel balancing moderate corrosion resistance and high surface hardness. It offers superior wear and impact resistance, maintaining stable dimensional accuracy during long-cycle continuous operation.
440 Stainless Steel: Ultra-high hardness stainless steel with exceptional abrasion resistance and structural stability. It sustains precise operation under heavy wear and corrosive conditions, customized for high-end electronic and industrial precision miniature systems.
Core Advantages And Industrial Applications
The 629 deep groove ball bearing features an ultra-compact lightweight structure, ultra-low noise, minimal friction and stable high-speed performance. Three sealing designs and five diversified material grades fully cover economical, rust-proof, wear-resistant and anti-corrosion application scenarios. It is widely utilized in micro motors, precision instruments, consumer electronics, intelligent equipment transmission parts, small household appliances, miniature medical devices, automated precision accessories and food processing micro machinery, providing stable, low-maintenance and high-precision rotation solutions for modern light-load miniature mechanical systems.
