Bi-directional Pneumatic Clutches
Last Updated: April 1, 2025
Description
Bi-directional pneumatic clutches are devices that transfer power within a power transmission driveline using compressed air or another gas as the operating fluid. These clutches are capable of rotating in either direction, allowing for versatile power transfer between components such as engines, transmissions, and drive wheels.
Working Principle
Bi-directional pneumatic clutches operate by engaging and disengaging power transfer through the use of compressed air. When engaged, the clutch transfers power from the engine to downstream devices, while disengagement stops the power transfer but allows the engine to continue running. The use of compressed air provides a clean and efficient means of actuation, offering more accurate torque control compared to mechanical clutches. The ability to direct air across the clutch plates for cooling enhances their thermal capacity, making them particularly useful in applications requiring extended periods of engagement.
Applications
Bi-directional pneumatic clutches are used in various applications, including conveyor drives and pump motor drives. They are also employed in systems requiring web tension control, automation, or robotics. Additionally, these clutches are often found in larger, heavier vehicles like buses, where they are paired with pneumatic brakes to reduce braking distances.
Advantages over other Pneumatic Clutches
Bi-directional pneumatic clutches offer several advantages over other types of pneumatic clutches. They provide zero backlash, meaning there is no play during engagement or disengagement, which is crucial for precision applications. The ability to automatically re-engage the load when torque drops to an acceptable level enhances operational efficiency. Furthermore, their design allows for adjustable torque, which is beneficial for applications requiring slip clutches or torque limiters.
Limitations
One limitation of bi-directional pneumatic clutches is that they do not achieve the same torque levels as hydraulic clutches. While they transmit higher torques than similarly sized electric or mechanical clutches, their torque capacity is still less than that of hydraulic systems.
Considerations
When considering bi-directional pneumatic clutches, it is important to evaluate factors such as initial costs, operating expenses, and maintenance requirements. These clutches are generally lightweight and require relatively low maintenance, which can reduce long-term operating costs. However, the initial cost may vary depending on the specific features and customization required for the application. Durability and accuracy are enhanced by the clutch's ability to provide precise torque control and zero backlash, but regular maintenance is necessary to ensure optimal performance and longevity.
from Mach III Clutch, Inc.
Operation. Friction type heavy duty clutch mechanism engages with air pressure, spring released when air is exhausted. Torque is linear in response to air pressure applied. Mounting. Through/Mid Shaft or End of Shaft. Heavy duty clutch mechanism slides on shaft and is fixed with set screws and a... [See More]
- Features: Adjustable Torque; Bidirectional
- Pneumatic Pressure: 80
- Torque: 0.0 to 276.7
- Spring Assistance: Spring Return/Disengage
from WPT Power Corporation
The WPT Low Inertia (LI) High Torque Clutch is a pneumatic design for high energy, high cycle applications requiring end-shaft mounting. The High Torque version of the LI Clutch provides maximum torque in limited space. Our LI High Torque Clutch is time tested and used extensively throughout the... [See More]
- Features: Bidirectional
- Rotary Speed: 2140
- Torque: 2166.7
- Pneumatic Pressure: 100
from Mach III Clutch, Inc.
Operation. Friction type heavy duty clutch mechanism engages with air pressure, spring released when air is exhausted. Torque is linear in response to air pressure applied. Mounting. Set screws and customer supplied key connect the heavy duty clutch mechanism to one shaft and the coupling hub to a... [See More]
- Features: Adjustable Torque; Bidirectional
- Pneumatic Pressure: 80
- Torque: 0.0 to 276.7
- Spring Assistance: Spring Return/Disengage
from WPT Power Corporation
The WPT Power Grip Clutch is designed to accommodate in-line and shaft-to-shaft power transmission applications. With available sizes ranging from 8 ” to 60 ”, WPT ’s air-actuated dry-clutch is recognized as the industry standard. Common applications include but are not limited to;... [See More]
- Features: Bidirectional
- Rotary Speed: 2100
- Torque: 6535.0
- Pneumatic Pressure: 100
from Mach III Clutch, Inc.
Operation. Friction clutch mechanism engages with air pressure, spring released when air is exhausted. Torque is linear in response to air pressure applied. Mounting. Clutch mechanisms can be mounted Through/Mid Shaft or End of Shaft. Clutch mechanism slides on shaft and is fixed with set screws and... [See More]
- Features: Adjustable Torque; Bidirectional
- Pneumatic Pressure: 80
- Torque: 0.0 to 46.2
- Spring Assistance: Spring Return/Disengage
from WPT Power Corporation
The WPT Power Grip PO Clutch is designed to accommodate in-line power transmission applications. With available sizes ranging from 14 ” to 36 ”, WPT ’s air-actuated dry-clutch is recognized as the industry standard. Common applications include but are not limited to; Mining, Oil... [See More]
- Features: Bidirectional; Mechanical Lockup
- Rotary Speed: 2100
- Torque: 312.5
- Pneumatic Pressure: 130
from Mach III Clutch, Inc.
Operation. Friction clutch coupling engages with air pressure, spring released when air is exhausted. Torque is linear in response to air pressure applied. Mounting. Set screws and customer supplied key connect the clutch mechanism to one shaft and the coupling hub to a second, fully supported... [See More]
- Features: Adjustable Torque; Bidirectional
- Pneumatic Pressure: 80
- Torque: 0.0 to 46.2
- Spring Assistance: Spring Return/Disengage
from Mach III Clutch, Inc.
Operation. Industrial friction clutch engages with air pressure, spring released when air is exhausted. Torque is linear in response to air pressure applied. Mounting. End of Shaft. Friction clutch slides on shaft and is fixed with set screws and a customer supplied key. No anti-rotation arm... [See More]
- Features: Adjustable Torque; Washdown capable (optional feature); Bidirectional
- Pneumatic Pressure: 80
- Torque: 0.0 to 46.2
- Spring Assistance: Spring Return/Disengage
from Mach III Clutch, Inc.
Operation. Friction type heavy duty clutch engages with air pressure, spring released when air is exhausted. Torque is linear in response to air pressure applied. Mounting. End Shaft. Heavy duty clutch slides on shaft and is fixed with set screws and a customer supplied key. No anti-rotation arm... [See More]
- Features: Adjustable Torque; Washdown capable (optional feature); Bidirectional
- Pneumatic Pressure: 80
- Torque: 0.0 to 390.8
- Spring Assistance: Spring Return/Disengage
from Mach III Clutch, Inc.
Operation. Friction clutch engages with air pressure, spring released when air is exhausted. Torque is linear in response to air pressure applied. Mounting. End Shaft. Clutch slides on shaft and is fixed with set screws and a customer supplied key. No anti-rotation arm required. Designed for... [See More]
- Features: Adjustable Torque; Washdown capable (optional feature); Bidirectional
- Pneumatic Pressure: 80
- Torque: 0.0 to 46.2
- Spring Assistance: Spring Return/Disengage
from Mach III Clutch, Inc.
Operation. Friction type heavy duty clutch is engaged with spring pressure. A fixed amount of torque is transmitted. To release clutch, air pressure is applied to overcome the spring pressure. Mounting. End of Shaft. Heavy duty clutch slides on shaft and is fixed with set screws and a customer... [See More]
- Features: Bidirectional
- Rotary Speed: 1750
- Torque: 0.0 to 241.8
- Pneumatic Pressure: 90
from Mach III Clutch, Inc.
Operation. Industrial friction clutch is engaged with spring pressure. A fixed amount of torque is transmitted. To release clutch, air pressure is applied to overcome the spring pressure. Mounting. End of Shaft. Spring Engaged friction clutch slides on shaft and is fixed with set screws and a... [See More]
- Features: Bidirectional
- Rotary Speed: 1750
- Torque: 0.0 to 42.2
- Pneumatic Pressure: 90
from Mach III Clutch, Inc.
Operation. Friction clutch coupling engages with air pressure, spring released when air is exhausted. Torque is linear in response to air pressure applied. Mounting. Set screws and customer supplied key connect the clutch mechanism to one shaft and the coupling hub to a second, fully supported... [See More]
- Features: Adjustable Torque; Bidirectional
- Pneumatic Pressure: 80
- Torque: 0.0 to 46.2
- Spring Assistance: Spring Return/Disengage
from Mach III Clutch, Inc.
Operation. Friction type heavy duty clutch engages with air pressure, spring released when air is exhausted. Torque is linear in response to air pressure applied. Mounting. Set screws and customer supplied key connect the heavy duty clutch mechanism to one shaft and the coupling hub to a fully... [See More]
- Features: Adjustable Torque; Bidirectional
- Pneumatic Pressure: 80
- Torque: 0.0 to 276.7
- Spring Assistance: Spring Return/Disengage
from Mach III Clutch, Inc.
Operation. Friction clutch engages with air pressure, spring released when air is exhausted. Torque is linear response to air pressure applied. Mounting. Mounts between a c-face motor and gear reducer. Not suitable for belt drive (pulley output) applications. Consult engineering for options. [See More]
- Features: Adjustable Torque; Washdown capable (optional feature); Bidirectional
- Pneumatic Pressure: 80
- Torque: 0.0 to 47.8
- Spring Assistance: Spring Return/Disengage
from Mach III Clutch, Inc.
Operation. Friction clutch engages with air pressure and is designed for continous slip. Clutch is spring released when air is exhausted. Torque is linear in response to air pressure applied. Mounting. Foot brackets attach to machine frame or other fixture. Pulleys or sprockets mount to the clutch's... [See More]
- Features: Adjustable Torque; Bidirectional
- Pneumatic Pressure: 80
- Torque: 0.0 to 5.5
- Spring Assistance: Spring Return/Disengage
from Mach III Clutch, Inc.
Operation. Friction clutch engages with air pressure and is designed for continous slip. Clutch is spring released when air is exhausted. Torque is linear in response to air pressure applied. Mounting. Through/Mid Shaft or End of Shaft. Anti-rotation arm required to prevent rotation of the air... [See More]
- Features: Adjustable Torque; Bidirectional
- Pneumatic Pressure: 80
- Torque: 0.0 to 5.5
- Spring Assistance: Spring Return/Disengage
from Mach III Clutch, Inc.
Operation. Industrial friction clutch engages with air pressure, spring released when air is exhausted. Torque is linear in response to air pressure applied. Mounting. Through/Mid Shaft or End Shaft. Friction clutch slides on shaft and is fixed with set screws and a customer supplied key. [See More]
- Features: Adjustable Torque; Bidirectional
- Pneumatic Pressure: 80
- Torque: 0.0 to 46.2
- Spring Assistance: Spring Return/Disengage
from Mach III Clutch, Inc.
Operation. Friction clutch engages with air pressure, spring released when air is exhausted. Torque is linear in response to air pressure applied. Mounting. Through/Mid Shaft or End of Shaft. Clutch slides on shaft and is fixed with set screws and a customer supplied key. Anti-rotation arm required... [See More]
- Features: Adjustable Torque; Bidirectional
- Pneumatic Pressure: 80
- Torque: 0.0 to 46.2
- Spring Assistance: Spring Return/Disengage
from Mach III Clutch, Inc.
Operation. Friction type heavy duty clutch engages with air pressure, spring released when air is exhausted. Torque is linear in response to air pressure applied. Mounting. Through/Mid Shaft or End of Shaft. Heavy duty clutch slides on the shaft and is fixed with set screws and a customer supplied... [See More]
- Features: Adjustable Torque; Bidirectional
- Pneumatic Pressure: 80
- Torque: 0.0 to 276.7
- Spring Assistance: Spring Return/Disengage