Product Details
6802-2RS Thin Section Bearing P6 High Precision Ceramic Ball Bearing for Motors Robots Automobile
Ceramic ball bearings, featuring silicon nitride (Si3N4) or zirconia (ZrO2) balls, are transforming electric motor bearings with their exceptional properties. Compared to traditional steel balls, ceramic balls offer:
Parameter | Ceramic Balls | Steel Balls |
Density | 40% lighter | Higher density |
Hardness | 30% harder | Lower hardness |
Friction | 50-60% lower | Higher friction |
Heat Resistance | Up to 800°C | Limited to 200-300°C |
Corrosion | Highly resistant | Prone to corrosion |
Speed Capability | 20-30% higher | Limited by heat |
These advantages make ceramic ball bearings ideal for high-performance electric motor applications, including:
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Electric Vehicles (EVs): Enhanced efficiency and extended range.
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Industrial Motors: Reduced downtime and maintenance costs.
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Precision Machinery: Improved accuracy and reliability.
By reducing friction, heat, and wear, ceramic ball bearings ensure longer lifespan and superior performance in demanding electric motor environments.

Technical Parameters of P6 Cermic Ball Bearings:
Bearing Specification 68 Series
Basic Bearing No. | Bore d | Outer Diameter D | Width W | Radius r | Basic Load Rating KN | Maximum Run out Speed | Weight kg/pc |
Dynamic | Static | Grease | Oil |
mm | inch | mm | inch | mm | inch | mm | inch | C | CO | r/min | r/min |
685 | 5 | 0.1969 | 11 | 0.4331 | 3 | 0.1181 | 0.1 | 0.006 | 0.715 | 0.282 | 35000 | 45000 | 0.0011 |
686 | 6 | 0.2362 | 13 | 0.5118 | 3.5 | 0.1378 | 0.15 | 0.006 | 1.08 | 0.44 | 33000 | 42000 | 0.0019 |
687 | 7 | 0.2756 | 14 | 0.5512 | 3.5 | 0.1378 | 0.15 | 0.006 | 1.17 | 0.51 | 31000 | 40000 | 0.0021 |
688 | 8 | 0.3150 | 16 | 0.6299 | 4 | 0.1575 | 0.2 | 0.008 | 1.26 | 0.585 | 29000 | 38000 | 0.0031 |
689 | 9 | 0.3543 | 17 | 0.6693 | 4 | 0.1575 | 0.2 | 0.008 | 1.72 | 0.82 | 28000 | 36000 | 0.0032 |
6800 | 10 | 0.3937 | 19 | 0.7480 | 5 | 0.1969 | 0.3 | 0.012 | 1.83 | 0.925 | 26000 | 34000 | 0.005 |
6800W7 | 10 | 0.3937 | 19 | 0.7480 | 7 | 0.2756 | 0.3 | 0.012 | 1.83 | 0.925 | 26000 | 34000 | 0.006 |
6801 | 12 | 0.4724 | 21 | 0.8268 | 5 | 0.1969 | 0.3 | 0.012 | 1.92 | 1.04 | 22000 | 30000 | 0.006 |
6802 | 15 | 0.5906 | 24 | 0.9449 | 5 | 0.1969 | 0.3 | 0.012 | 2.08 | 1.26 | 20000 | 28000 | 0.007 |
6803 | 17 | 0.6693 | 26 | 1.0236 | 5 | 0.1969 | 0.3 | 0.012 | 2.81 | 1.72 | 19000 | 26000 | 0.008 |
6804 | 20 | 0.7874 | 32 | 1.2598 | 7 | 0.2756 | 0.3 | 0.012 | 4 | 2.47 | 17000 | 22000 | 0.019 |
6805 | 25 | 0.9843 | 37 | 1.4567 | 7 | 0.2756 | 0.3 | 0.012 | 4.3 | 2.95 | 15000 | 19000 | 0.022 |
6806 | 30 | 1.1811 | 42 | 1.6535 | 7 | 0.2756 | 0.3 | 0.012 | 4.7 | 3.65 | 13000 | 17000 | 0.026 |
6807 | 35 | 1.3780 | 47 | 1.8504 | 7 | 0.2756 | 0.3 | 0.012 | 4.9 | 4.05 | 11000 | 15000 | 0.029 |
6808 | 40 | 1.5748 | 52 | 2.0472 | 7 | 0.2756 | 0.3 | 0.012 | 5.1 | 4.4 | 9000 | 13000 | 0.033 |
6809 | 45 | 1.7717 | 58 | 2.2835 | 7 | 0.2756 | 0.3 | 0.012 | 6.4 | 5.65 | 7000 | 11000 | 0.04 |
6810 | 50 | 1.9685 | 65 | 2.5591 | 7 | 0.2756 | 0.3 | 0.012 | 6.6 | 6.1 | 5000 | 9000 | 0.052 |
Application Senarios of High Precision Ceremic Ball Bearings
The 68 series deep groove thin-wall ceramic ball bearings are widely used in high-precision applications, particularly in motor bearings for robotics, drones, and medical devices. With common precision grades of ABEC-5 or higher, they ensure superior performance, reduced friction, and enhanced durability in compact, high-speed electric motor systems.
Customization Welcomed:
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We can printing your brand (logo,artwork)on the shield or laser engraving your brand on the shield.
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We can custom your packaging according to your design.
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All copyright owned by clients and we promised don't disclose any information.
Other Technical Data of Bearings
ABEC-5 Tolerance Class ABEC-5 (P5)
Inner Ring | Tolerance in um/s |
d mm | Δdmp | Vdp²)Diameter Series | Vdmp | Kia | Sd | Sis3) | ΔBs | Vbs |
9 | 0,1,2,3,4 |
over | including | high | low | max | 3 | max | max | max | High | Low | max |
1)0.6 | 2.5 | 0 | -5 | 5 | 4 | 3 | 4 | 7 | 7 | 0 | -40 | 5 |
2.5 | 10 | 0 | -5 | 5 | 4 | 3 | 4 | 7 | 7 | 0 | -40 | 5 |
10 | 18 | 0 | -5 | 5 | 4 | 3 | 4 | 7 | 7 | 0 | -80 | 5 |
18 | 30 | 0 | -6 | 6 | 5 | 3 | 4 | 8 | 8 | 0 | -120 | 5 |
30 | 50 | 0 | -8 | 8 | 6 | 4 | 5 | 8 | 8 | 0 | -120 | 5 |
50 | 80 | 0 | -9 | 9 | 7 | 5 | 5 | 8 | 8 | 0 | -150 | 6 |
Outer Ring | Tolerance in um/s |
D mm | Δdmp | Vdp²)Diameter Series | Vdmp | Kia | SD4) SD15) | Sea4)5) | ΔBs | Vbs |
9 | 0,1,2,3,4 |
over | including | high | low | max |
| max | max | max | High | Low | max |
1)2.5 | 6 | 0 | -5 | 5 | 4 | 3 | 5 | 8 | 8 |
| 5 |
6 | 18 | 0 | -5 | 5 | 4 | 3 | 5 | 8 | 8 | 5 |
18 | 30 | 0 | -6 | 6 | 5 | 3 | 6 | 8 | 8 | 5 |
30 | 50 | 0 | -7 | 7 | 5 | 4 | 7 | 8 | 8 | 5 |
50 | 80 | 0 | -9 | 9 | 7 | 5 | 8 | 8 | 10 | 6 |
80 | 120 | 0 | -10 | 10 | 8 | 5 | 10 | 9 | 11 | 8 |
120 | 150 | 0 | -11 | 11 | 8 | 6 | 11 | 10 | 13 | 8 |
ABEC-7 Tolerance Class ABEC-7 (P4)
Inner Ring | Tolerance in um/s |
d mm | Δdmp | Δds | Vdp²)Diameter Series | Vdmp | Kia | Sd | Sia | ΔBs | Vbs |
7,8,9 | 1,7,2,3,4 |
over | including | high | low | high | low | max | max | max | max | max | High | low | Low | max |
1)0.6 | 2.5 | 0 | -4 | 0 | -4 | 4 | 3 | 2 | 2.5 | 3 | 3 | 0 | -40 | -40 | 2.5 |
2.5 | 10 | 0 | -4 | 0 | -4 | 4 | 3 | 2 | 2.5 | 3 | 3 | 0 | -40 | -40 | 2.5 |
10 | 18 | 0 | -4 | 0 | -4 | 4 | 3 | 2 | 2.5 | 3 | 3 | 0 | -80 | -80 | 2.5 |
18 | 30 | 0 | -5 | 0 | -5 | 5 | 4 | 2.5 | 3 | 4 | 4 | 0 | -120 | -120 | 2.5 |
30 | 50 | 0 | -6 | 0 | -5 | 6 | 4 | 3 | 4 | 4 | 4 | 0 | -120 | -120 | 3 |
50 | 80 | 0 | -7 | 0 | -5 | 7 | 5 | 3.5 | 4 | 5 | 5 | 0 | -150 | -150 | 4 |
Outer Ring | Tolerance in um/s |
D mm | Δdmp | Δds | Vdp²)Diameter Series | Vdmp | Kia | Sd | Sia | ΔBs | Vbs |
7,8,9 | 1,7,2,3,4 |
over | including | high | low | high | low | max | max | max | max | max | High | low | max |
1)2.5 | 6 | 0 | -4 | 0 | -4 | 4 | 3 | 2 | 3 | 4 | 5 | Identical to ΔBs and VBs of inner ring of same bearing | 2.5 |
6 | 18 | 0 | -4 | 0 | -4 | 4 | 3 | 2 | 3 | 4 | 5 | 2.5 |
18 | 30 | 0 | -5 | 0 | -5 | 5 | 4 | 2.5 | 4 | 4 | 5 | 2.5 |
30 | 50 | 0 | -6 | 0 | -6 | 6 | 5 | 3 | 5 | 4 | 5 | 2.5 |
50 | 80 | 0 | -7 | 0 | -7 | 7 | 5 | 3.5 | 5 | 4 | 5 | 3 |
80 | 120 | 0 | -8 | 0 | -8 | 8 | 6 | 4 | 6 | 5 | 6 | 4 |
120 | 150 | 0 | -9 | 0 | -9 | 9 | 7 | 5 | 7 | 5 | 7 | 5 |
Packing and Shipping:
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The deep groove ball bearings will be securely packaged individually, or tube packing or packed as customization packing
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Shipping method is negotiable.
Company Profile
We are Ningbo Kent Bearing Co., Ltd, one of the leading high-quality bearing manufacturer and
supplier, established in 2003.
We registered the BUGAO Bearing trademark in 2003 and specialize in
deep groove ball bearings
for electric motors, automobiles, household appliances, power tools,
pumps, motorcycles, heavy vehicles,
machines and more.
The company has advanced assembly production lines and perfect
quality inspection center, and we
also passed ISO 9001: 2015 quality certification. We have an annual
production capacity of 30 million sets
of high quality bearing. Because of the company currently has more
than 20 automatic production lines,
all kinds of testing equipment and inspection equipment. We have
professional and technical personnel
with senior titles accounted for 20%. And we also continue to draw
domestic and foreign professional and
technical personnel. At present, we have own R&D center, which
has always been researching new
technology and more advanced equipment on bearing production and
inspection to improve the bearing's
quality and enhance the production efficiency. We have always been
aiming to make No.1 quality bearings
in the world.