Discover our extensive range of premium miniature ball bearings including MR52, MR63, MR83, MR74, MR84, MR104, MR85, MR95, MR105, MR115, MR106, MR126, MR117, MR137, MR128, and MR148. Each bearing exemplifies our commitment to precision and durability.
| Bearing number |
Bearing size |
Cr(N) |
Cor(N) |
rpm(grease ZZ) |
rpm(oil OPEN) |
weight(g) |
| MR52ZZ |
2x5x2.5 |
187 |
58 |
85000 |
100000 |
0.16 |
| MR63ZZ |
3x6x2.5 |
208 |
74 |
71000 |
80000 |
0.20 |
| MR83ZZ |
3x8x3 |
560 |
179 |
60000 |
67000 |
0.54 |
| MR74ZZ |
4x7x2.5 |
310 |
115 |
60000 |
67000 |
0.22 |
| MR84ZZ |
4x8x3 |
395 |
139 |
56000 |
67000 |
0.36 |
| MR104ZZ |
4x10x4 |
710 |
270 |
50000 |
60000 |
1.04 |
| MR85ZZ |
5x8x2.5 |
310 |
120 |
53000 |
63000 |
0.26 |
| MR95ZZ |
5x9x3 |
430 |
168 |
50000 |
60000 |
0.50 |
| MR105ZZ |
5x10x4 |
430 |
168 |
50000 |
60000 |
0.95 |
| MR115ZZ |
5x11x4 |
715 |
276 |
50000 |
56000 |
1.49 |
| MR106ZZ |
6x10x3 |
495 |
218 |
45000 |
53000 |
0.56 |
| MR126ZZ |
6x12x4 |
715 |
292 |
43000 |
50000 |
1.27 |
| MR117ZZ |
7x11x3 |
455 |
201 |
43000 |
50000 |
0.62 |
| MR137ZZ |
7x13x4 |
540 |
276 |
40000 |
48000 |
1.58 |
| MR128ZZ |
8x12x3.5 |
545 |
274 |
40000 |
48000 |
0.71 |
| MR148ZZ |
8x14x4 |
820 |
385 |
38000 |
45000 |
1.86 |
| MR84ZZ(H4) |
8x4x2 |
395 |
139 |
56000 |
67000 |
0.36 |
- Bushing - Customized sizes available to meet your specific needs.
- Flange Bearing - A broad selection of items to suit your requirements.
- Ball Bearing - Offering top-tier quality P6 and P5 grades with noise levels Z2, Z3, and Z4. We ensure fast delivery for your convenience.
Established in 2013, Ningbo Zhenhai Dongsheng Bearing Factory resides in the thriving Zhenhai District of Ningbo City. Our expertise lies in the research, development, and manufacturing of micro bearings.
Equipped with state-of-the-art production facilities and advanced bearing manufacturing technologies, we uphold a scientific approach to quality, striving for excellence. Our key products include metric and imperial deep groove ball bearings, stainless steel bearings, flange series bearings, plane thrust ball bearings, precision thin-wall, low-noise bearings, non-standard bearings, and pulley series, featuring an inner diameter of 1-15mm and an outer diameter of less than 25mm. Certified by the EU for environmental protection and possessing ROHS test reports, our products are exported to Hong Kong, Europe, America, South Korea, Japan, and beyond. These products are integral to household appliances, instruments, micro motors, medical devices, textile machinery, electric tools, high-end toys, fishing gear, model aircraft, and more. In the evolving market landscape where the internet has made pricing transparent and competition fierce, we prioritize quality to secure our market position. Our production supervisor, with over 15 years of industry experience, ensures that our product quality continually strives for improvement, encapsulated by our ethos: 'there is no best, only better.' Our factory regularly dispatches key technical staff for external learning opportunities to enhance our offerings, aiming for the utmost customer satisfaction.
Dedicated to unparalleled quality and exceptional service, we aim to bolster our clients' business success. We extend a warm invitation to friends worldwide to visit and collaborate with us for mutual growth and development.
Our advanced equipment and high-precision testing technology significantly enhance processing accuracy and product quality while shortening production cycles. Through continuous technological innovation, we consistently improve our product quality, earning customer trust.
Dongsheng bearings are indispensable in various applications, including automobiles, motorcycles, water pumps, electric tools, air compressors, reducers, industrial motors, generators, textile machinery, agricultural machinery, transmission equipment, and machine tools.
Dongsheng bearings also play a crucial role in home appliances and office equipment such as air conditioners, washing machines, vacuum cleaners, massagers, sewing machines, range hoods, microwave ovens, and copiers.
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