6301-2RS Single Row Deep Groove Radial Ball Bearing C3 Clearance Bearing for High Speed Motor Water Pump
The 6301 2RS Bearing is part of the 6300 series of high-speed, deep groove ball bearings, specifically designed for demanding applications such as water pumps. This bearing features double rubber seals (2RS), which provide excellent protection against water, dust, and other contaminants, making it ideal for wet and harsh environments. The C3 clearance indicates a larger internal clearance than standard bearings, allowing for better thermal expansion management and reduced friction under high-speed or high-temperature conditions. With its robust construction and sealed design, the 6301 2RS bearing ensures reliable performance, durability, and low maintenance in water pumps and similar applications.
Key Features:
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Double Rubber Seals (2RS): Provides superior protection against water, dust, and debris, extending bearing life.
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C3 Clearance: Allows for thermal expansion and reduces friction, making it suitable for high-speed and high-temperature applications.
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High-Speed Capability: Designed for efficient operation at high rotational speeds.
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Durable Construction: Made from high-quality chrome steel for excellent wear and corrosion resistance.
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Low Maintenance: Sealed design reduces the need for frequent relubrication.
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Versatility: Suitable for both radial and axial load applications.
Dimensions:
6300 Bearing Dimension Chart
Parameter | Measurement (mm) |
Inner Diameter (ID) | 10 mm |
Outer Diameter (OD) | 35 mm |
Width (W) | 11 mm |
Protective Features:
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Water Resistance: The double rubber seals (2RS) effectively prevent water ingress, making the bearing ideal for water pumps and other wet environments.
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Dust and Debris Protection: The seals block dust and debris, ensuring smooth operation and reducing wear.
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Corrosion Resistance: Chrome steel construction provides excellent resistance to rust and corrosion, even in humid or wet conditions.
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Lubrication Retention: The sealed design retains lubricant, reducing the need for frequent maintenance and extending bearing life.
Advantages of 6301 2RS Bearing (C3 Clearance):
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Reliability in Harsh Environments: Perfect for water pumps and other applications exposed to water and contaminants.
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High-Speed Performance: C3 clearance allows for efficient operation at high speeds and under thermal expansion.
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Durability: High-quality materials and sealed design provide long-lasting performance.
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Low Friction: Designed for efficient operation, reducing energy consumption and heat generation.
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Easy Installation: Standard dimensions and design make it easy to replace and install.
Applications:
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Water Pumps: The 6301 2RS bearing is widely used in water pumps due to its water resistance and durability.
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Pool Pump Motors: Suitable for pool pumps and other wet environments.
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Agricultural Equipment: Used in machinery exposed to water, dust, and harsh conditions.
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Industrial Machinery: Ideal for applications requiring high-speed operation and contamination protection.
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Household Appliances: Used in washing machines, dishwashers, and other appliances exposed to moisture.


63 Series Bearings Parameters
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 |
635 | 5 | 0.1969 | 19 | 0.7480 | 6 | 0.2362 | 0.3 | 0.012 | 2.34 | 0.885 | 34000 | 40000 | 0.008 |
6300 | 10 | 0.3937 | 35 | 1.3780 | 11 | 0.4331 | 0.6 | 0.024 | 8.2 | 3.5 | 15000 | 21000 | 0.053 |
6301 | 12 | 0.4724 | 37 | 1.4567 | 12 | 0.4724 | 1.0 | 0.039 | 9.7 | 4.2 | 14000 | 20000 | 0.06 |
6302 | 15 | 0.5906 | 42 | 1.6535 | 13 | 0.5118 | 1.0 | 0.039 | 11.4 | 5.45 | 13000 | 18000 | 0.082 |
6303 | 17 | 0.6693 | 47 | 1.8504 | 14 | 0.5512 | 1.0 | 0.039 | 13.5 | 6.55 | 12000 | 17000 | 0.115 |
6304 | 20 | 0.7874 | 52 | 2.0472 | 15 | 0.5906 | 1.1 | 0.043 | 15.9 | 7.9 | 11000 | 15000 | 0.144 |
6305 | 25 | 0.9843 | 62 | 2.4409 | 17 | 0.6693 | 1.1 | 0.043 | 21.2 | 10.9 | 10000 | 13000 | 0.2193 |
6306 | 30 | 1.1811 | 72 | 2.8346 | 19 | 0.7480 | 1.1 | 0.043 | 26.7 | 15 | 8000 | 10000 | 0.3498 |
6307 | 35 | 1.3780 | 80 | 3.1496 | 21 | 0.8268 | 1.5 | 0.059 | 33.5 | 19.1 | 6800 | 8000 | 0.4542 |
6308 | 40 | 1.5748 | 90 | 3.5433 | 23 | 0.9055 | 1.5 | 0.059 | 40.5 | 24 | 5800 | 7200 | 0.6394 |
6309 | 45 | 1.7717 | 100 | 3.9370 | 25 | 0.9843 | 1.5 | 0.059 | 53 | 32 | 5000 | 6200 | 0.8363 |
6310 | 50 | 1.9685 | 110 | 4.3307 | 27 | 1.0630 | 2.0 | 0.079 | 62 | 38.5 | 4400 | 5500 | 1.0822 |
6311 | 55 | 2.1654 | 120 | 4.7244 | 29 | 1.1417 | 2.0 | 0.079 | 47.1 | 45 | 4200 | 5300 | 1.35 |
6312 | 60 | 2.3622 | 130 | 5.1181 | 31 | 1.2205 | 2.1 | 0.083 | 85.2 | 52 | 4000 | 5100 | 1.7 |
6313 | 65 | 2.5591 | 140 | 5.5118 | 33 | 1.2992 | 2.1 | 0.083 | 97.5 | 60 | 3900 | 5000 | 2.1 |
6314 | 70 | 2.7559 | 150 | 5.9055 | 35 | 1.3740 | 2.1 | 0.083 | 111 | 68 | 3800 | 4800 | 2.5 |
6315 | 75 | 2.9528 | 160 | 6.2992 | 37 | 1.4567 | 2.1 | 0.083 | 119 | 76.5 | 3600 | 5600 | 3 |
Wide Applications of Deep Groove Ball Bearings

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.
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.
Other Technical Data of Bearings:
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ABEC-1 Tolerance Class ABEC-1 (P0)
Inner Ring | Tolerance in um/s |
d mm | Δdmp | 9 | Vdp²)0,1 Diameter Series | 2,3,4 | Vdmp | Kia | ΔBs | Vbs |
over | including | high | low | max | max | max | high | low | max |
1)0.6 | 2.5 | 0 | -8 | 10 | 8 | 6 | 6 | 10 | 0 | -40 | 12 |
2.5 | 10 | 0 | -8 | 10 | 8 | 6 | 6 | 10 | 0 | -120 | 15 |
10 | 18 | 0 | -8 | 10 | 8 | 6 | 6 | 10 | 0 | -120 | 20 |
18 | 30 | 0 | -10 | 13 | 10 | 8 | 8 | 13 | 0 | -120 | 20 |
30 | 50 | 0 | -12 | 15 | 12 | 9 | 9 | 15 | 0 | -120 | 20 |
50 | 80 | 0 | -15 | 19 | 19 | 11 | 11 | 20 | 0 | -150 | 25 |
Outer Ring | Tolerance in um/s |
D mm | Δdmp | VDp2)4)Open Bearings Diameter Series | Capped Bearings2)3) | Vdmp | Kia | ΔBs | Vbs |
9 | 0,1 | 2,3,4 | 2,3,4 |
over | including | high | low | max | max | max | high | low | max |
1)2.5 | 6 | 0 | -8 | 10 | 8 | 6 | 10 | 6 | 15 | Identical to ΔBs and VBs of inner ring of same bearing |
6 | 18 | 0 | -8 | 10 | 8 | 6 | 10 | 6 | 15 |
18 | 30 | 0 | -9 | 12 | 9 | 7 | 12 | 7 | 15 |
30 | 50 | 0 | -11 | 14 | 11 | 8 | 16 | 8 | 20 |
50 | 80 | 0 | -13 | 16 | 13 | 10 | 20 | 10 | 25 |
80 | 120 | 0 | -15 | 19 | 19 | 11 | 26 | 11 | 35 |
120 | 150 | 0 | -18 | 23 | 23 | 14 | 30 | 14 | 40 |
ABEC-3 Tolerance Class ABEC-3 (P6)
Inner Ring | Tolerance in um/s |
d mm | Δdmp | 9 | Vdp²)0,1 Diameter Series | 2,3,4 | Vdmp | Kia | ΔBs | Vbs |
over | including | high | low | max | max | max | high | low | max |
11)0.6 | 2.5 | 0 | -7 | 9 | 7 | 5 | 5 | 5 | 0 | -40 | 12 |
2.5 | 10 | 0 | -7 | 9 | 7 | 5 | 5 | 6 | 0 | -120 | 15 |
10 | 18 | 0 | -7 | 9 | 7 | 5 | 5 | 7 | 0 | -120 | 20 |
18 | 30 | 0 | -8 | 10 | 8 | 6 | 6 | 8 | 0 | -120 | 20 |
30 | 50 | 0 | -10 | 13 | 10 | 8 | 8 | 10 | 0 | -120 | 20 |
50 | 80 | 0 | -12 | 15 | 15 | 9 | 9 | 10 | 0 | -150 | 25 |
Outer Ring | Tolerance in um/s |
D mm | Δdmp | VDp2)4)Open Bearings Diameter Series | Capped Bearings2)3) | Vdmp | Kia | ΔBs | Vbs |
9 | 0,1 | 2,3,4 | 2,3,4 |
over | including | high | low | max | max | max | high | low | max |
1)2.5 | 6 | 0 | -7 | 9 | 7 | 5 | 9 | 5 | 8 | Identical to ΔBs and VBs of inner ring of same bearing |
6 | 18 | 0 | -7 | 9 | 7 | 5 | 9 | 5 | 8 |
18 | 30 | 0 | -8 | 10 | 8 | 6 | 10 | 6 | 9 |
30 | 50 | 0 | -9 | 11 | 9 | 7 | 13 | 7 | 10 |
50 | 80 | 0 | -11 | 14 | 11 | 8 | 16 | 8 | 13 |
80 | 120 | 0 | -13 | 16 | 16 | 10 | 20 | 10 | 18 |
120 | 150 | 0 | -15 | 19 | 19 | 11 | 25 | 11 | 20 |
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 |

Tolerance Data for Vibration of Single Bearing
D | V | V1 | V2 | V3 | V4 |
mm | Low | Medium | High | Low | Medium | High | Low | Medium | High | Low | Medium | High | Low | Medium | High |
3,4 | 80 | 44 | 44 | 60 | 35 | 32 | 48 | 26 | 22 | 31 | 16 | 15 | 28 | 10 | 10 |
5,6 | 110 | 72 | 60 | 74 | 48 | 40 | 58 | 36 | 30 | 35 | 21 | 18 | 32 | 11 | 11 |
7,8,9 | 130 | 96 | 80 | 92 | 66 | 54 | 72 | 48 | 40 | 44 | 28 | 24 | 38 | 12 | 12 |
10,12 | 160 | 120 | 100 | 120 | 80 | 70 | 90 | 60 | 50 | 55 | 35 | 30 | 45 | 14 | 15 |
15 | 210 | 150 | 120 | 150 | 100 | 85 | 110 | 78 | 60 | 65 | 46 | 35 | 52 | 18 | 18 |
17 | 210 | 150 | 120 | 150 | 100 | 85 | 110 | 78 | 60 | 65 | 46 | 35 | 52 | 25 | 25 |
20 | 260 | 190 | 150 | 180 | 125 | 100 | 130 | 100 | 75 | 80 | 60 | 45 | 60 | 25 | 25 |
22,25 | 260 | 190 | 150 | 180 | 125 | 100 | 130 | 100 | 75 | 80 | 60 | 45 | 60 | 30 | 32 |
28 | 260 | 190 | 150 | 180 | 125 | 100 | 130 | 100 | 75 | 80 | 60 | 45 | 60 | 35 | 40 |
30,32 | 300 | 240 | 190 | 200 | 150 | 130 | 150 | 120 | 100 | 90 | 75 | 60 | 70 | 35 | 40 |
35 | 300 | 240 | 190 | 200 | 150 | 130 | 150 | 120 | 100 | 90 | 75 | 60 | 70 | 42 | 45 |
40 | 360 | 300 | 260 | 240 | 180 | 160 | 180 | 150 | 130 | 110 | 90 | 80 | 82 | 50 | 50 |
45 | 360 | 300 | 260 | 240 | 180 | 160 | 180 | 150 | 130 | 110 | 90 | 80 | 82 | 60 | 60 |
50 | 420 | 320 | 320 | 280 | 200 | 200 | 210 | 160 | 160 | 125 | 100 | 100 | 95 | 70 | 70 |
Maximum Vibration Acceleration of Single Bearing
D | Diameter Series(0) | Diameter Series(2) | Diameter Series(3) |
mm | Z | Z1 | Z2 | Z3 | Z | Z1 | Z2 | Z3 | Z4 | Z | Z1 | Z2 | Z3 | Z4 |
3 | 35 | 34 | 32 | 28 | 36 | 35 | 32 | 30 | - | 37 | 36 | 33 | 31 | - |
4 | 35 | 34 | 32 | 28 | 36 | 35 | 32 | 30 | - | 37 | 36 | 33 | 31 | - |
5 | 37 | 36 | 34 | 30 | 38 | 37 | 34 | 32 | - | 39 | 37 | 35 | 33 | - |
6 | 37 | 36 | 34 | 30 | 38 | 37 | 34 | 32 | - | 39 | 37 | 35 | 33 | - |
7 | 39 | 38 | 35 | 31 | 40 | 38 | 36 | 34 | - | - | - | - | - | - |
8 | 39 | 38 | 35 | 31 | 40 | 38 | 36 | 34 | - | - | - | - | - | - |
9 | 41 | 40 | 36 | 32 | 42 | 40 | 37 | 35 | - | - | - | - | - | - |
10 | 43 | 42 | 38 | 33 | 44 | 42 | 39 | 35 | 30 | 37 | 44 | 40 | 37 | 32 |
12 | 44 | 43 | 39 | 34 | 45 | 43 | 39 | 35 | 30 | 47 | 45 | 40 | 37 | 32 |
15 | 45 | 44 | 40 | 35 | 46 | 44 | 41 | 36 | 31 | 48 | 46 | 42 | 38 | 33 |
17 | 46 | 44 | 40 | 35 | 47 | 45 | 41 | 36 | 31 | 49 | 47 | 42 | 38 | 33 |
20 | 47 | 45 | 41 | 36 | 48 | 46 | 42 | 38 | 33 | 50 | 48 | 43 | 39 | 34 |
22 | 47 | 45 | 41 | 36 | 48 | 46 | 42 | 38 | 33 | 50 | 48 | 43 | 39 | 34 |
25 | 48 | 46 | 42 | 38 | 49 | 47 | 43 | 40 | 36 | 51 | 49 | 44 | 41 | 37 |
28 | 49 | 47 | 43 | 39 | 50 | 48 | 44 | 41 | 37 | 52 | 50 | 45 | 42 | 38 |
30 | 49 | 47 | 43 | 39 | 50 | 48 | 44 | 41 | 37 | 52 | 50 | 45 | 42 | 38 |
32 | 50 | 48 | 44 | 40 | 51 | 49 | 45 | 42 | 38 | 53 | 51 | 46 | 43 | 39 |
35 | 51 | 49 | 45 | 41 | 52 | 50 | 46 | 43 | 39 | 54 | 52 | 47 | 44 | 40 |
40 | 53 | 51 | 46 | 42 | 54 | 52 | 47 | 44 | 40 | 56 | 54 | 49 | 45 | 41 |
45 | 55 | 53 | 48 | 45 | 56 | 54 | 49 | 46 | 43 | 58 | 56 | 51 | 47 | 44 |
50 | 57 | 54 | 50 | 47 | 58 | 55 | 51 | 48 | 45 | 60 | 57 | 53 | 49 | 46 |
55 | 59 | 56 | 52 | 49 | 60 | 57 | 53 | 50 | 47 | 62 | 59 | 54 | 51 | 48 |
60 | 61 | 58 | 54 | 51 | 62 | 59 | 54 | 51 | 48 |
| 61 | 56 | 53 | 50 |