61702 ZZ 6702 ZZ Deep Groove Ball Bearings15mm X 21mm X 4mm Thin
Section Robot Bearings
61702 ZZ Deep Groove Ball Bearings 15x21x4mm Thin Section Robot
Bearing 6702 ZZ high performance bearing
The 6702 ZZ 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 ZZ Ball Bearings 15X21X4mm Specifications & Dimensions
| Universal | 6702 ZZ |
| 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 ZZ is a deep groove ball bearing, finds its applications across
various fields due to its thin-section design (dimensions
15×21×4mm), high precision, and other notable features. Here are
the primary application areas:
1. Beauty Instruments and Personal Care Devices
Primarily used in the rotating components of automatic hair
curlers, foot files, and similar products. Its thin-wall design and
high-precision characteristics make it suitable for miniaturized
devices operating under high temperatures or at high speeds.
2. Smart Automation and Robotics
Applied in precision transmission systems such as smart locks,
robot joints, and robotic arms. The low noise, high speed (up to
7600rpm with grease lubrication), and stability of this bearing
make it ideal for these applications.
3. Motors and Micro Machinery
Suitable for use in micro motors, model aircraft, cooling fans,
etc. The double-sided dust cover (ZZ) design effectively prevents
dust ingress, extending the lifespan of the bearing.
4. Automotive and Industrial Equipment
Utilized in auxiliary components of automotive engines, gearboxes,
machine tool gearboxes, reducers, etc. Made from high-carbon
chromium bearing steel (GCr15), it supports operations in
high-temperature environments and offers strong axial load
capacity.
5. Home Appliances and Office Equipment
Commonly found in oscillating fans, shredders, printers, and more.
Its low vibration characteristic contributes to smoother operation
of these devices.
6.Other Potential Applications
Also involved in medical devices, precision instruments, and other
sectors that require high precision and reliability.
