BB-1K-K and BB-2GD 1K-K series have a keyway on the inner race. Keyways, except size 25 are manufactured to DIN 6885. 3, BB40-1K-K and BB40-2GD 1K-K are manufactured to DIN 6885. 1.
BB-2K-K series has a keyway on both the inner and outer race. “-K” means keys shipped together with Cam Clutch. Correct interference dimensions at the shaft and the housing must be maintained to obtain maximum bearing and clutch performance.
BB, BB-1K and BB-2K Clutches, bearing supported and delivered with grease have dust seal protection against particles of 0.25mm and over, whereas BB-2GD and BB-2GD-1K clutches, 5mm wider than standard BB series, have special lip seals for effective protection against any dust. The arrow on the inner race shows the direction of inner race engaging.
To install the clutch, use a press tool of the appropriate diameter to apply even pressure over the entire face of the inner and outer race. Do not hammer or apply other shock to the clutch. Make sure the housing has enough strength to withstand the pressure required for the press fitting installation of the Clutch.
Operating temperature range: –30°C to +100°C (Consult us for the temperature that exceeds this range).

型号 Type | 扭矩容量 Torque Capacity | Max. Overrunning | 空转摩擦扭矩 Drag Torque (N.m) | A | |||
内圈 Inner Race | 外圈 Outer Race | BB | BB-2GD | BB | BB-2G | ||
N.m | r/min | r/min | |||||
BB 15 | 29 | 3600 | 2000 | 0.010 | 0.040 | 11 | 16 |
BB 17 | 43 | 3500 | 1900 | 0.010 | 0.050 | 12 | 17 |
BB 20 | 61 | 3000 | 1600 | 0.014 | 0.055 | 14 | 19 |
BB 25 | 78 | 2500 | 1400 | 0.017 | 0.055 | 15 | 20 |
BB 30 | 140 | 2000 | 1100 | 0.030 | 0.058 | 16 | 21 |
BB 35 | 173 | 1800 | 1000 | 0.034 | 0.060 | 17 | 22 |
BB 40 | 260 | 1800 | 900 | 0.040 | 0.080 | 22 | 27 |
型号 Type | B | C | D | r | 重量 Weight(g) | 轴承载荷 Bearing Loads | |||
BB | BB-2GD | BB | BB-2GD | Cr | Cor | ||||
N | N | ||||||||
BB 15 | 35 | 15 | 32.6 | 32.45 | 0.6 | 50 | 70 | 5950 | 3230 |
BB 17 | 40 | 17 | 36.1 | 36.45 | 0.6 | 80 | 100 | 7000 | 3700 |
BB 20 | 47 | 20 | 41.7 | 42.35 | 1.0 | 120 | 150 | 8500 | 4900 |
BB 25 | 52 | 25 | 47.1 | 47.05 | 1.0 | 150 | 200 | 10700 | 6300 |
BB 30 | 62 | 30 | 56.6 | 55.60 | 1.0 | 230 | 280 | 11900 | 7900 |
BB 35 | 72 | 35 | 64.0 | 64.60 | 1.1 | 320 | 410 | 13500 | 9700 |
BB 40 | 80 | 40 | 71.0 | 71.60 | 1.1 | 400 | 600 | 14500 | 11700 |
Pictures of BB Series One-Way Bearings


Customized type is also available to produce , pls feel free to contact for negotiation .
The BB series one-way bearing is ingeniously crafted to provide controlled motion in a single direction. Let's break down its structure into key components:
Outer Race:
The outer race serves as the stationary component, usually affixed to the housing of the machinery.
It provides a stable foundation for the entire bearing assembly.
Inner Race:
The inner race is connected to the rotating element, such as a shaft or wheel.
This part transmits torque and facilitates the controlled movement of the machinery.
Sprags or Rollers:
BB one-way bearings employ either sprags or rollers to achieve unidirectional functionality.
Sprags are small wedged elements strategically positioned between the inner and outer races.
Understanding the working principle of BB one-way bearings is fundamental to appreciating their significance in mechanical systems.
Engagement Phase:
When torque is applied in the designated direction, the sprags or rollers engage.
This engagement allows for smooth and controlled rotation of the inner race with respect to the outer race.
Disengagement Phase:
When force is applied in the opposite direction, the sprags or rollers disengage.
This prevents backward movement, maintaining the unidirectional nature of the rotation.
BB one-way bearings excel in efficiently transmitting torque in one specific direction. This property is achieved through the precise design of the sprags or rollers and their interaction with the inner and outer races.
The versatility of BB one-way bearings is showcased through their widespread applications across various industries.
In the automotive sector, BB one-way bearings find applications in:
Starter Motors :
Enabling the transmission of rotational motion to the engine's crankshaft.
Preventing the engine from forcing the starter motor to spin, ensuring smooth engine starts.
In industrial settings, these bearings play a vital role in:
Conveyor Systems:
Preventing reverse motion in conveyor systems, ensuring controlled movement.
Packaging Machinery:
Maintaining controlled motion to avoid damage or malfunction caused by accidental reverse motion.
In the realm of sports and recreation, BB one-way bearings are commonly found in:
Bicycles:
Powering the freewheel mechanism, allowing cyclists to coast without pedaling while ensuring power transmission when pedaling forward.
In modern robotics and automation, these bearings contribute to:
Precision Robotics:
Enabling precise and controlled movement in robotic arms and mechanisms.
Enhanced Safety:
Preventing unwanted reverse motion enhances the overall safety of mechanical systems.
Energy Efficiency:
Minimizing energy loss by allowing rotation only in the intended direction.
Reduced Wear:
Decreasing wear and tear on components by preventing backdriving.
Limited Reverse Load:
BB one-way bearings are not designed to handle substantial reverse loads.
Maintenance Requirements:
Regular lubrication and proper handling are essential for maintaining optimal performance and longevity.
To ensure the longevity of BB one-way bearings, proper lubrication is paramount. Regular application of high-quality lubricant helps reduce friction and wear, contributing to the efficiency of the mechanism.
Appropriate handling and storage practices contribute significantly to the extended lifespan of BB one-way bearings. Avoiding excessive impact and keeping the bearing free from contaminants are essential precautions.
In conclusion, the BB one-way bearing stands as a marvel of engineering, offering controlled and efficient unidirectional rotation. Its versatile applications across industries, from automotive to industrial machinery and sports equipment, underscore its significance in enhancing the performance and safety of mechanical systems.
By comprehending the intricate structure, working principles, and practical applications of BB one-way bearings, engineers and enthusiasts alike can harness their potential for creating reliable and innovative solutions.
Can BB one-way bearings be used in high-speed applications?
Yes, BB one-way bearings are designed to handle high-speed applications with precision.
Are you Trading Company or Manufacturer?
SUMA is Manufacturer with one-stop service , Production history over 20 years, exporting experience up to 10 years
Can i have One-Way Bearings Samples to check quality first
You are encourged to get one way bearing sample for quality check .
How soon you can make the shipment of my One Way Bearing order ?
Usually all are in stock, can ship out within 2-3 days .
If big quantity, can ship out in 10 days .
Customized sizes may need 15-20 days , Depends on specific order.
Is there guarantee of One Way Bearings purchased?
We provide 1 year warranty for all backstop clutch we sell.
BB-1K-K and BB-2GD 1K-K series have a keyway on the inner race. Keyways, except size 25 are manufactured to DIN 6885. 3, BB40-1K-K and BB40-2GD 1K-K are manufactured to DIN 6885. 1.
BB-2K-K series has a keyway on both the inner and outer race. “-K” means keys shipped together with Cam Clutch. Correct interference dimensions at the shaft and the housing must be maintained to obtain maximum bearing and clutch performance.
BB, BB-1K and BB-2K Clutches, bearing supported and delivered with grease have dust seal protection against particles of 0.25mm and over, whereas BB-2GD and BB-2GD-1K clutches, 5mm wider than standard BB series, have special lip seals for effective protection against any dust. The arrow on the inner race shows the direction of inner race engaging.
To install the clutch, use a press tool of the appropriate diameter to apply even pressure over the entire face of the inner and outer race. Do not hammer or apply other shock to the clutch. Make sure the housing has enough strength to withstand the pressure required for the press fitting installation of the Clutch.
Operating temperature range: –30°C to +100°C (Consult us for the temperature that exceeds this range).

型号 Type | 扭矩容量 Torque Capacity | Max. Overrunning | 空转摩擦扭矩 Drag Torque (N.m) | A | |||
内圈 Inner Race | 外圈 Outer Race | BB | BB-2GD | BB | BB-2G | ||
N.m | r/min | r/min | |||||
BB 15 | 29 | 3600 | 2000 | 0.010 | 0.040 | 11 | 16 |
BB 17 | 43 | 3500 | 1900 | 0.010 | 0.050 | 12 | 17 |
BB 20 | 61 | 3000 | 1600 | 0.014 | 0.055 | 14 | 19 |
BB 25 | 78 | 2500 | 1400 | 0.017 | 0.055 | 15 | 20 |
BB 30 | 140 | 2000 | 1100 | 0.030 | 0.058 | 16 | 21 |
BB 35 | 173 | 1800 | 1000 | 0.034 | 0.060 | 17 | 22 |
BB 40 | 260 | 1800 | 900 | 0.040 | 0.080 | 22 | 27 |
型号 Type | B | C | D | r | 重量 Weight(g) | 轴承载荷 Bearing Loads | |||
BB | BB-2GD | BB | BB-2GD | Cr | Cor | ||||
N | N | ||||||||
BB 15 | 35 | 15 | 32.6 | 32.45 | 0.6 | 50 | 70 | 5950 | 3230 |
BB 17 | 40 | 17 | 36.1 | 36.45 | 0.6 | 80 | 100 | 7000 | 3700 |
BB 20 | 47 | 20 | 41.7 | 42.35 | 1.0 | 120 | 150 | 8500 | 4900 |
BB 25 | 52 | 25 | 47.1 | 47.05 | 1.0 | 150 | 200 | 10700 | 6300 |
BB 30 | 62 | 30 | 56.6 | 55.60 | 1.0 | 230 | 280 | 11900 | 7900 |
BB 35 | 72 | 35 | 64.0 | 64.60 | 1.1 | 320 | 410 | 13500 | 9700 |
BB 40 | 80 | 40 | 71.0 | 71.60 | 1.1 | 400 | 600 | 14500 | 11700 |
Pictures of BB Series One-Way Bearings


Customized type is also available to produce , pls feel free to contact for negotiation .
The BB series one-way bearing is ingeniously crafted to provide controlled motion in a single direction. Let's break down its structure into key components:
Outer Race:
The outer race serves as the stationary component, usually affixed to the housing of the machinery.
It provides a stable foundation for the entire bearing assembly.
Inner Race:
The inner race is connected to the rotating element, such as a shaft or wheel.
This part transmits torque and facilitates the controlled movement of the machinery.
Sprags or Rollers:
BB one-way bearings employ either sprags or rollers to achieve unidirectional functionality.
Sprags are small wedged elements strategically positioned between the inner and outer races.
Understanding the working principle of BB one-way bearings is fundamental to appreciating their significance in mechanical systems.
Engagement Phase:
When torque is applied in the designated direction, the sprags or rollers engage.
This engagement allows for smooth and controlled rotation of the inner race with respect to the outer race.
Disengagement Phase:
When force is applied in the opposite direction, the sprags or rollers disengage.
This prevents backward movement, maintaining the unidirectional nature of the rotation.
BB one-way bearings excel in efficiently transmitting torque in one specific direction. This property is achieved through the precise design of the sprags or rollers and their interaction with the inner and outer races.
The versatility of BB one-way bearings is showcased through their widespread applications across various industries.
In the automotive sector, BB one-way bearings find applications in:
Starter Motors :
Enabling the transmission of rotational motion to the engine's crankshaft.
Preventing the engine from forcing the starter motor to spin, ensuring smooth engine starts.
In industrial settings, these bearings play a vital role in:
Conveyor Systems:
Preventing reverse motion in conveyor systems, ensuring controlled movement.
Packaging Machinery:
Maintaining controlled motion to avoid damage or malfunction caused by accidental reverse motion.
In the realm of sports and recreation, BB one-way bearings are commonly found in:
Bicycles:
Powering the freewheel mechanism, allowing cyclists to coast without pedaling while ensuring power transmission when pedaling forward.
In modern robotics and automation, these bearings contribute to:
Precision Robotics:
Enabling precise and controlled movement in robotic arms and mechanisms.
Enhanced Safety:
Preventing unwanted reverse motion enhances the overall safety of mechanical systems.
Energy Efficiency:
Minimizing energy loss by allowing rotation only in the intended direction.
Reduced Wear:
Decreasing wear and tear on components by preventing backdriving.
Limited Reverse Load:
BB one-way bearings are not designed to handle substantial reverse loads.
Maintenance Requirements:
Regular lubrication and proper handling are essential for maintaining optimal performance and longevity.
To ensure the longevity of BB one-way bearings, proper lubrication is paramount. Regular application of high-quality lubricant helps reduce friction and wear, contributing to the efficiency of the mechanism.
Appropriate handling and storage practices contribute significantly to the extended lifespan of BB one-way bearings. Avoiding excessive impact and keeping the bearing free from contaminants are essential precautions.
In conclusion, the BB one-way bearing stands as a marvel of engineering, offering controlled and efficient unidirectional rotation. Its versatile applications across industries, from automotive to industrial machinery and sports equipment, underscore its significance in enhancing the performance and safety of mechanical systems.
By comprehending the intricate structure, working principles, and practical applications of BB one-way bearings, engineers and enthusiasts alike can harness their potential for creating reliable and innovative solutions.
Can BB one-way bearings be used in high-speed applications?
Yes, BB one-way bearings are designed to handle high-speed applications with precision.
Are you Trading Company or Manufacturer?
SUMA is Manufacturer with one-stop service , Production history over 20 years, exporting experience up to 10 years
Can i have One-Way Bearings Samples to check quality first
You are encourged to get one way bearing sample for quality check .
How soon you can make the shipment of my One Way Bearing order ?
Usually all are in stock, can ship out within 2-3 days .
If big quantity, can ship out in 10 days .
Customized sizes may need 15-20 days , Depends on specific order.
Is there guarantee of One Way Bearings purchased?
We provide 1 year warranty for all backstop clutch we sell.