Concentric LD Series Linear Actuators

The LD Series of linear actuators by Concentric International (formerly Iowa Export-Import) are 12V DC gearmotors that use a worm drive to move a shaft back and forth along its length. The worm drive ensures that the shaft will hold its position even when unpowered. Two limits switches safely stop the motor at either end of its range, while diodes allow it to reverse direction after reaching a limit point. The actuators are mostly metal, and the entire case is sealed to protect against dust and water (rated IP63).

The linear actuators are available in a variety of lengths and with optional potentiometers that are linked to the shaft position, for use in feedback systems. Several lengths are also available in two gear ratios: 5:1 and 20:1. The 5:1 versions have lower load ratings—34 lbs dynamic, 450 lbs static—but allow for higher speeds, up to 1.7 in/s. The 20:1 versions are slower—up to 0.5 in/s—but are rated for dynamic loads up to 110 lbs and static loads up to 500 lbs.

Compare all products in this category

	On sale! Pololu item #: 2302 Price: $89.95 $119.95 Temporarily out of stock. See product page to backorder.
Concentric LACT2-12V-20 Linear Actuator: 2" Stroke, 12V, 0.5"/s This 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 20:1 reduction gearbox that gives the actuator a dynamic load rating of 110 lbs (50 kg) and a maximum speed of 0.5 in/s (1.3 cm/s), and it is rated to withstand up to 500 lbs when not moving. Limit switches at each end make the actuator easy to control over its full range of motion, and the worm drive ensures that the shaft will hold its position even when unpowered. This version has a 2-inch stroke and no potentiometer.

	On sale! Pololu item #: 2303 Price: $109.95 $149.95 Quantity:
Concentric LACT2P-12V-20 Linear Actuator with Feedback: 2" Stroke, 12V, 0.5"/s This 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 20:1 reduction gearbox that gives the actuator a dynamic load rating of 110 lbs (50 kg) and a maximum speed of 0.5 in/s (1.3 cm/s), and it is rated to withstand up to 500 lbs when not moving. Limit switches at each end make the actuator easy to control over its full range of motion, and the worm drive ensures that the shaft will hold its position even when unpowered. This version has a 2-inch stroke and a built-in potentiometer for position feedback.

	On sale! Pololu item #: 2318 Price: $89.95 $119.95 Quantity:
Concentric LACT4-12V-5 Linear Actuator: 4" Stroke, 12V, 1.7"/s This 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 5:1 reduction gearbox that gives the actuator a dynamic load rating of 34 lbs (15 kg) and a maximum speed of 1.7 in/s (4.3 cm/s), and it is rated to withstand up to 450 lbs when not moving. Limit switches at each end make the actuator easy to control over its full range of motion, and the worm drive ensures that the shaft will hold its position even when unpowered. This version has a 4-inch stroke and no potentiometer.

	On sale! Pololu item #: 2304 Price: $89.95 $119.95 Quantity:
Concentric LACT4-12V-20 Linear Actuator: 4" Stroke, 12V, 0.5"/s This 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 20:1 reduction gearbox that gives the actuator a dynamic load rating of 110 lbs (50 kg) and a maximum speed of 0.5 in/s (1.3 cm/s), and it is rated to withstand up to 500 lbs when not moving. Limit switches at each end make the actuator easy to control over its full range of motion, and the worm drive ensures that the shaft will hold its position even when unpowered. This version has a 4-inch stroke and no potentiometer.

	On sale! Pololu item #: 2319 Price: $109.95 $149.95 Out of stock.
Concentric LACT4P-12V-5 Linear Actuator with Feedback: 4" Stroke, 12V, 1.7"/s This 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 5:1 reduction gearbox that gives the actuator a dynamic load rating of 34 lbs (15 kg) and a maximum speed of 1.7 in/s (4.3 cm/s), and it is rated to withstand up to 450 lbs when not moving. Limit switches at each end make the actuator easy to control over its full range of motion, and the worm drive ensures that the shaft will hold its position even when unpowered. This version has a 4-inch stroke and a built-in potentiometer for position feedback.

	On sale! Pololu item #: 2305 Price: $109.95 $149.95 Quantity:
Concentric LACT4P-12V-20 Linear Actuator with Feedback: 4" Stroke, 12V, 0.5"/s This 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 20:1 reduction gearbox that gives the actuator a dynamic load rating of 110 lbs (50 kg) and a maximum speed of 0.5 in/s (1.3 cm/s), and it is rated to withstand up to 500 lbs when not moving. Limit switches at each end make the actuator easy to control over its full range of motion, and the worm drive ensures that the shaft will hold its position even when unpowered. This version has a 4-inch stroke and a built-in potentiometer for position feedback.

	On sale! Pololu item #: 2306 Price: $89.95 $119.95 Quantity:
Concentric LACT6-12V-20 Linear Actuator: 6" Stroke, 12V, 0.5"/s This 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 20:1 reduction gearbox that gives the actuator a dynamic load rating of 110 lbs (50 kg) and a maximum speed of 0.5 in/s (1.3 cm/s), and it is rated to withstand up to 500 lbs when not moving. Limit switches at each end make the actuator easy to control over its full range of motion, and the worm drive ensures that the shaft will hold its position even when unpowered. This version has a 6-inch stroke and no potentiometer.

	On sale! Pololu item #: 2307 Price: $109.95 $149.95 Quantity:
Concentric LACT6P-12V-20 Linear Actuator with Feedback: 6" Stroke, 12V, 0.5"/s This 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 20:1 reduction gearbox that gives the actuator a dynamic load rating of 110 lbs (50 kg) and a maximum speed of 0.5 in/s (1.3 cm/s), and it is rated to withstand up to 500 lbs when not moving. Limit switches at each end make the actuator easy to control over its full range of motion, and the worm drive ensures that the shaft will hold its position even when unpowered. This version has a 6-inch stroke and a built-in potentiometer for position feedback.

	On sale! Pololu item #: 2308 Price: $89.95 $119.95 Quantity:
Concentric LACT8-12V-20 Linear Actuator: 8" Stroke, 12V, 0.5"/s This 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 20:1 reduction gearbox that gives the actuator a dynamic load rating of 110 lbs (50 kg) and a maximum speed of 0.5 in/s (1.3 cm/s), and it is rated to withstand up to 500 lbs when not moving. Limit switches at each end make the actuator easy to control over its full range of motion, and the worm drive ensures that the shaft will hold its position even when unpowered. This version has a 8-inch stroke and no potentiometer.

	On sale! Pololu item #: 2309 Price: $109.95 $149.95 Quantity:
Concentric LACT8P-12V-20 Linear Actuator with Feedback: 8" Stroke, 12V, 0.5"/s This 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 20:1 reduction gearbox that gives the actuator a dynamic load rating of 110 lbs (50 kg) and a maximum speed of 0.5 in/s (1.3 cm/s), and it is rated to withstand up to 500 lbs when not moving. Limit switches at each end make the actuator easy to control over its full range of motion, and the worm drive ensures that the shaft will hold its position even when unpowered. This version has an 8-inch stroke and a built-in potentiometer for position feedback.

	On sale! Pololu item #: 2310 Price: $89.95 $119.95 Quantity:
Concentric LACT10-12V-20 Linear Actuator: 10" Stroke, 12V, 0.5"/s This 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 20:1 reduction gearbox that gives the actuator a dynamic load rating of 110 lbs (50 kg) and a maximum speed of 0.5 in/s (1.3 cm/s), and it is rated to withstand up to 500 lbs when not moving. Limit switches at each end make the actuator easy to control over its full range of motion, and the worm drive ensures that the shaft will hold its position even when unpowered. This version has a 10-inch stroke and no potentiometer.

	On sale! Pololu item #: 2311 Price: $109.95 $149.95 Quantity:
Concentric LACT10P-12V-20 Linear Actuator with Feedback: 10" Stroke, 12V, 0.5"/s This 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 20:1 reduction gearbox that gives the actuator a dynamic load rating of 110 lbs (50 kg) and a maximum speed of 0.5 in/s (1.3 cm/s), and it is rated to withstand up to 500 lbs when not moving. Limit switches at each end make the actuator easy to control over its full range of motion, and the worm drive ensures that the shaft will hold its position even when unpowered. This version has a 10-inch stroke and a built-in potentiometer for position feedback.

	On sale! Pololu item #: 2326 Price: $89.95 $119.95 Quantity:
Concentric LACT12-12V-5 Linear Actuator: 12" Stroke, 12V, 1.7"/s This 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 5:1 reduction gearbox that gives the actuator a dynamic load rating of 34 lbs (15 kg) and a maximum speed of 1.7 in/s (4.3 cm/s), and it is rated to withstand up to 450 lbs when not moving. Limit switches at each end make the actuator easy to control over its full range of motion, and the worm drive ensures that the shaft will hold its position even when unpowered. This version has a 12-inch stroke and no potentiometer.

	On sale! Pololu item #: 2312 Price: $89.95 $119.95 Quantity:
Concentric LACT12-12V-20 Linear Actuator: 12" Stroke, 12V, 0.5"/s This 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 20:1 reduction gearbox that gives the actuator a dynamic load rating of 110 lbs (50 kg) and a maximum speed of 0.5 in/s (1.3 cm/s), and it is rated to withstand up to 500 lbs when not moving. Limit switches at each end make the actuator easy to control over its full range of motion, and the worm drive ensures that the shaft will hold its position even when unpowered. This version has a 12-inch stroke and no potentiometer.

	On sale! Pololu item #: 2327 Price: $109.95 $149.95 Quantity:
Concentric LACT12P-12V-5 Linear Actuator with Feedback: 12" Stroke, 12V, 1.7"/s This 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 5:1 reduction gearbox that gives the actuator a dynamic load rating of 34 lbs (15 kg) and a maximum speed of 1.7 in/s (4.3 cm/s), and it is rated to withstand up to 450 lbs when not moving. Limit switches at each end make the actuator easy to control over its full range of motion, and the worm drive ensures that the shaft will hold its position even when unpowered. This version has a 12-inch stroke and a built-in potentiometer for position feedback.

	On sale! Pololu item #: 2313 Price: $109.95 $149.95 Quantity:
Concentric LACT12P-12V-20 Linear Actuator with Feedback: 12" Stroke, 12V, 0.5"/s This 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 20:1 reduction gearbox that gives the actuator a dynamic load rating of 110 lbs (50 kg) and a maximum speed of 0.5 in/s (1.3 cm/s), and it is rated to withstand up to 500 lbs when not moving. Limit switches at each end make the actuator easy to control over its full range of motion, and the worm drive ensures that the shaft will hold its position even when unpowered. This version has a 12-inch stroke and a built-in potentiometer for position feedback.

	On sale! Pololu item #: 2314 Price: $12.95 $14.93 Quantity:
Mounting Bracket for Concentric LD Linear Actuators This machined aluminum bracket allows the Concentric LD series linear actuators to be mounted to a structure. Complete mounting hardware is included. Two brackets are required for mounting each actuator.

	Pololu item #: 2315 Price: $9.95 Quantity:
42" Extension Cable for Concentric LD Linear Actuators This 42" (1.05 m) extension cable is designed to work with LACTxP linear actuators with feedback. One end of the cable is terminated with male power and feedback connectors that securely snap into the actuator’s female power and feedback connectors. The other end has the same female connectors as the linear actuator’s cable; you can cut off these connectors and solder the five wire leads directly to your project, or you use crimp pins and crimp connector housings to make your own custom connector.