61702 6702 Deep Groove Ball Bearings15mm X 21mm X 4mm Thin Section
Robot Bearings
The 6702 deep groove ball bearing, with dimensions of 15 mm inner
diameter × 21mm outer diameter × 4mm width, is renowned for its
compact size, high-speed capability, and low noise characteristics.
Bearing Number | Boundary Dimensions(mm) | Basic Load Rating(N) | Limiting Speed(rpm) | Reference(kg)
Weight |
| Inner Diameter | Outer Diameter | Width | Chamfer | Dynamic | Static | Grease | Oil |
| d | D | B | B1 | r(min) | Cr | Cor | Non-contact | Wt ≈ |
| 61700 | ZZ | | 10 | 15 | 3 | 4 | 0.1 | 800 | 390 | 34000 | 40000 | 0.00190 |
| 61701 | ZZ | 2RS | 12 | 18 | 4 | 4 | 0.2 | 910 | 530 | 32000 | 38000 | 0.00310 |
| 61702 | ZZ | 2RS | 15 | 21 | 4 | 4 | 0.2 | 850 | 490 | 28000 | 32000 | 0.00360 |
| 61703 | ZZ | 2RS | 17 | 23 | 4 | 4 | 0.2 | 960 | 610 | 26000 | 30000 | 0.00400 |
| 61704 | ZZ | 2RS | 20 | 27 | 4 | 4 | 0.2 | 1030 | 720 | 23000 | 28000 | 0.00590 |
| 61705 | ZZ | 2RS | 25 | 32 | 4 | 4 | 0.2 | 1090 | 830 | 19000 | 23000 | 0.00700 |
| 61706 | ZZ | 2RS | 30 | 37 | 4 | 4 | 0.2 | 1170 | 980 | 16000 | 19000 | 0.00830 |
| 61707 | ZZ | 2RS | 35 | 44 | 5 | 5 | 0.3 | 1850 | 1630 | 14000 | 17000 | 0.01500 |
| 61708 | ZZ | 2RS | 40 | 50 | 6 | 6 | 0.3 | 2519 | 2234 | 12000 | 15000 | 0.02300 |
| 61709 | ZZ | 2RS | 45 | 55 | 6 | 6 | 0.3 | 2577 | 2401 | 9000 | 13000 | 0.02500 |
| 61710 | ZZ | 2RS | 50 | 62 | 6 | 6 | 0.3 | 2666 | 2636 | 7000 | 10000 | 0.03400 |
| 61711 | ZZ | 2RS | 55 | 68 | 7 | 7 | 0.3 | 2880 | 3070 | 5000 | 8000 | 0.05500 |
6702 Ball Bearings 15X21X4mm Specifications & Dimensions
| Universal | 6702 |
| Type | Deep Groove Ball |
| Inner/Outer Ring/ Ball Material | Chrome Steel |
| Cage Material | Steel |
| CageType | Punching |
| Precision | P0,P6 |
| Inner Dimension d(Ø)(mm) | 15 |
| Outer Dimension D(Ø)(mm) | 21 |
| Width B (or T)(mm) | 4 |
| Lubrication | Grease |
| Load Direction | Radial |
| Specifications/Environment | Standard |
| Number of Raceway Ring Rows | Single Track |
| Size Standards | Metric Series |
The 6702 bearing, as a deep groove ball bearing, is widely used across various
fields due to its structural design and material adaptability
(e.g., ceramic or bearing steel). Below are its typical
applications and corresponding technical features:
1. High-Temperature & Corrosive Environments
- Chemical Equipment: Used in reactors and pumps that handle strong acids or alkalis.
- High-Temperature Industrial Equipment: Found in furnaces, steel smelting equipment, and plastic molding
machines.
- Medical Devices: Suitable for sterile, corrosion-resistant surgical tools and
testing equipment.
2. Home Appliances & Power Tools
- Personal Care Devices: Included in hair curlers, bladeless hair dryers, and electric
toothbrushes.
- Small Motors: Used in vacuum cleaners, juicers, and other home appliances.
- Power Tools: Applied in grinders, impact drills, and other high-load tools.
3. Industrial Machinery & Automation
- CNC Machines: Provides spindle support and guide rail systems with high
precision and low friction.
- Textile Machinery: Used in high-speed spinning machines and looms.
- Printing Equipment: Ensures wear resistance and stable operation in roller bearing
units.
4. Automotive & Transportation Equipment
- Automotive Motors: Found in wiper motors and electric window drive components.
- Bicycle Bottom Brackets: Features a thin-wall design for lightweight requirements.
5. Precision Instruments & Special Applications
- Non-Magnetic Equipment: Ideal for laboratory instruments and demagnetization devices.
- High-Speed Equipment: Used in centrifuges and precision optical instruments.
6. Other Fields
- Food Machinery: Stainless steel bearings are used in packaging and filling
equipment, requiring frequent cleaning and rust prevention.
- Energy Equipment: Small transmission components in wind turbines.
If you need more detailed information , feel free to ask!
