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 61702 open bearing, a type of deep groove ball bearing, features an open design that
makes it suitable for applications requiring frequent lubrication
or special working conditions. Stands out for its high-speed
adaptability, ease of maintenance, and compact design, making it
ideal for equipment requiring frequent adjustments or operating
under harsh conditions. When selecting this bearing, factors such
as load, speed, and environmental requirements should be
consideredBelow is a summary of its typical application areas:
1. Precision Instruments & Small Devices
- Micro Motors & Toy Models:
Used in remote-controlled cars and model devices due to its compact
size, high-speed performance, and energy efficiency.
- Office Equipment & Home Appliances:
Found in paper shredders, curling irons, fans, and similar devices
where low noise and smooth operation are essential.
2. Industrial Manufacturing
- Machine Tools & Precision Machinery:
Supports spindles and transmission components, ensuring stability
under moderate loads and enabling easy maintenance.
- Chemical & Food Processing Equipment:
Ideal for mixers, sterilizers, and other machinery in humid or
corrosive environments. Its open design allows for easy cleaning
and lubrication.
3. Special Working Conditions
- High-Temperature or High-Speed Environments:
Suitable for motor shafts and instruments operating at high speeds.
The open design improves heat dissipation and grease replenishment.
- Textile & Packaging Machinery:
Used in rollers and drive shafts, offering low friction and
reliable performance.
4. Other Applications
Applied in dental drills and optical instruments, where
cleanliness, precision, and low vibration are critical.
Used in robot joints and automated systems, providing flexibility
and long service life with minimal maintenance.
If you need more detailed information , feel free to ask!
