Electric Brake and Clutch Assemblies Specifications

Help with Electric Brake and Clutch Assemblies specifications:

Clutch Specifications

	Torque Rating		The maximum torque rating of a clutch drive.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Power		The rotary power of the load that devices must handle.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Rotational Speed		The rotary speed of the load. This specification applies only to rotary clutches.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Operating Voltage		The input voltage range for an electrically-operated clutch.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Spring Assistance
	Your choices are...
	Spring Actuation / Engage		The device is spring-actuated and needs power to engage.
	Spring Return / Disengage		The spring provides return force and the device needs power to disengage.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
	Clutch Engagement
	Your choices are...
	Noncontact		Devices use a noncontact technology such as a magnetic field or eddy currents to provide engagement and drive.
	Friction		Friction between contact surfaces transmits power. This is the most common configuration.
	Magnetic Particle		Magnetic particle products have a layer of fine particles between the stator and rotor. An input current to the stator coil creates a magnetic field that lines-up the particulate to provide load engagement (clutches) or slowing (brakes). The coupling torque is controlled directly by the magnetic field that is created by the input current. Magnetic particle brakes provide good control and a wide range of holding torque at any speed.
	Toothed		Toothed contact surfaces transmit power without slipping. No heat is generated. Devices are engaged only when stopped or running at a slow speed (< 20 rpm).
	Wrap Spring		Torque is transmitted from input to output by a coiled spring that wraps around the output element. The device is disengaged when the spring is uncoiled via a control tang at its end.
	Oil Shear		Drive engagement is achieved by the viscous shear of transmission fluid between the device's plates.
	Plate / Disc		The torque level is controlled by compression springs which force plates together.
	Ball Detent		Ball detent is a slip mechanism in which, upon overload, balls ride up out of seats to overcome springs or air pressure engagement.
	Roller Detent		Rollers, held in place by springs, wedge between the inner and outer races to engage the clutch.
	Pawl Detent		Pawl detent is a slip clutch mechanism in which, upon overload, the pawl overcomes spring or air pressure engagement and rotates out of its detent.
	Sprag		Sprags are steel wedges that tip in one direction to wedge between inner and outer races. They can be configured with either the inner or outer race as the input or output. Too much torque makes the sprags tip so much that contact is not maintained. Often, sprag clutches can transmit more torque than other designs of slip or overrunning clutches.
	Other		Other unlisted, specialized, or proprietary clutch engagement mechanisms.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
	Magnetic Clutch Type
	Your choices are...
	Permanent Magnet		Permanent magnets can be used in different ways. Some are used to provide engagement or disengagement actuation force. Others provide the magnetic field for hysteresis. Since they do not use electrical power, permanent magnet clutches are often used in situations that require greater levels of safety.
	Electromagnetic		Electromagnetic clutches use a coil which, when energized, creates a magnetic field that pulls the armature toward the rotor.  Once in mechanical contact, the rotor turns at the same rate as the armature and affects the drive. When unpowered, the armature retreats back to an air gap from the rotor.
	Hysteresis		Hysteresis uses noncontact magnetic fields to apply resistance or engage load rotation. Torque loading may be applied independently of shaft speed. The magnetic torque is frictionless because the magnetic flux field operates in the air gap between the rotor and the stationary poles. Brakes and clutches that use hysteresis are suitable for precision tensioning and holdback applications where close braking control is important, or when variable clutch engagement of a load is required.
	Eddy Current		Eddy current products use a magnetic field to induce eddy currents in the load. The load engagement, whether actuation (clutch) or slowing (brake), can be precisely controlled by controlling the magnetic field. Because no surfaces come into physical contact, there is no mechanical wear. Most eddy current devices are used in low-power applications.
	Other		Other unlisted, specialized, or proprietary electric clutch operations.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

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Brake Specifications

	Torque Rating		The maximum torque rating for the brake should equal or exceed the application's requirement.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Power		The maximum power rating for the brake.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Speed		The maximum rotary speed rating. This specification applies only to rotary brakes.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Operating Voltage		The input voltage range for an electrically-operated brake.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Brake Operation:
	Your choices are...
	Spring Actuation / Engage		The spring engages during operation and requires power to disengage. Spring-actuated brakes are also called power-off brakes, fail-safe brakes, and safety brakes.
	Spring Return / Disengage		The brakes need power to engage. A spring is used to disengage the brake. Spring-return brakes are also called power-on brakes and non-fail-safe brakes.
	Other		Other unlisted brake operation technologies.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
	Magnetic Brake Type
	Your choices are...
	Permanent Magnet		The brake uses a permanent magnet and features a power-off or fail-safe design since electrical power is not required.
	Electromagnetic		Electromagnetic brakes use a coil that, when energized, creates a magnetic field that pulls the armature of the rotating part toward the brake face. Once in mechanical contact, the rotor slows down and stops quickly. When unpowered, the rotor retreats to an air gap from the brake face.
	Hysteresis		Hysteresis products use noncontact magnetic fields to apply resistance to or engagement of load rotation. The torque loading may be applied independently of shaft speed. The magnetic torque is frictionless. The magnetic flux field operates in the air gap between the rotor and the stationary poles. Hysteresis brakes are used in precision tensioning and holdback applications where close braking control is important, or where variable clutch engagement of load is required.
	Eddy Current		Eddy current technology uses a magnetic field that causes eddy currents in the load.  The load engagement, whether actuation (clutch) or slowing (brake), can be precisely controlled by controlling the magnetic field. Because no surfaces are in physical contact, there is mechanical wear. Eddy current brakes are used primarily in low-power applications.
	Magnetic Particle		Magnetic particle products incorporate a layer of fine particles between the stator and rotor. An input current to the stator coil creates a magnetic field that lines-up the particulate to provide load engagement (clutches) or slowing (brakes). The coupling torque is controlled directly by the magnetic field created by the input current. Magnetic particle brakes provide good control and a wide range of holding torque at any speed.
	Other		Other unlisted, specialized, or proprietary magnetic brake operations.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
	Friction Brake Type:
	Your choices are...
	Band		Band brakes are the simplest type of brake. They have a metal band lined with heat- and wear-resistant friction material.
	Drum		Drum brakes press shoes against a spinning surface. They are often used on automobile rear wheels.
	Disc		Disc brakes have brake pads, a caliper, and a rotor. During operation, the brake pads are squeezed against the rotor. Disc brakes have good heat dissipation properties.
	Cone		Cone brakes consist of a cup and a cone which is lined with a heat- and wear-resistant friction material. During actuation the cone is pressed against the mating cup surface. Cone brakes are not commonly used.
	Other		Other unlisted, specialized, or proprietary brake engagement configurations.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

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Features & Options

	Your choices are...
	Adjustable Torque		Adjustable torque is used primarily for slip clutches and torque limiters. Users can adjust the torque at which the clutch disengages or slips.
	Zero Backlash		There is no play or backlash during the engagement of the load and no load disengagement during a direction reversal.
	Washdown Capable		The housing is rated for washdown cleaning.
	Bi-directional		Devices can be set-up to rotate in either direction.
	Automatic Re-engagement		The clutch re-engages the load when the torque drops to an acceptable level.
	Slip Indication		Slip indication can move a pin radially when an overload occurs, or send an electrical signal to the drive motor.
	Feedback		Feedback provides an electrical or electronic signal for monitoring parameters such as position, speed, torque, lockup, or slip status.
	Other		Other unlisted, specialized, or proprietary features.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

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Mechanical Specifications

	Shaft Configuration:
	Your choices are...
	In-line		The clutch or brake shaft is along same axis as the driven or braked load.
	Parallel		The clutch or brake shaft is parallel, but offset from the axis of the driven or braked load.
	Right Angle		The clutch or brake axis is perpendicular to the axis of the load.
	Other		Other unlisted shaft alignments.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
	Bore Diameter		The bore diameter.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Diameter		The diameter or cross-sectional width of the brake or clutch assembly.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Length		The dimension along the axis of rotation.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Weight		The weight of brake and/or clutch.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

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Brake Construction

	Brake Engagement:
	Your choices are...
	Noncontact		Braking action is achieved through a non-contact technology such as a magnetic field, eddy currents, etc.
	Friction		Friction between contact surfaces transmits power. This is the most common type of brake.
	Toothed		Toothed contact surfaces transmit power without slipping or heat generation. Teeth are engaged only when stopped or running at a slow speed (< 20 rpm).
	Wrap Spring		A coiled spring wraps downward onto the rotating element. The brake is disengaged when the spring is uncoiled via a control tang at its end.
	Oil Shear		Braking action is engaged via the viscous action of the shearing of transmission fluid.
	Other		Other unlisted, specialized, or proprietary brake engagement mechanisms.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

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