Hybrid linear actuator

Haydon Kerk Motion Solutions offers a unique line of hybrid stepper motor linear actuators that open new avenues for equipment designers who require high performance and exceptional endurance in a very small package. These high-performance hybrid actuators directly drive a rotor drive nut on a stainless steel precision acme lead screw. This patented interface reduces tolerances and noise while increasing efficiency and durability over v-thread and bronze nut configuration commonly used in other linear actuators. Actuators are available in captive, non-captive and external linear configurations.

Series Travel / Step (Micron) Max Force (Range) (N) Stroke (mm) Body Dimension (Size mm)
Captive Non-Captive
External Linear
Size 8 1.5 - 40 2 - 45 9.0 - 38.1 < 200 21 mm
Size 11 3 - 50 15 - 90 12.7 - 63.5 < 250 28 mm
Size 11 DS 3 - 50 30 - 133 12.7 - 63.5 < 250 28 mm
Size 14 1.5 - 50 50 - 220 12.7 - 63.5 < 300 35 mm
Size 14 DS 15.8 - 127 50 - 220 12.7 - 63.5 < 300 35 mm
Size 17 1.5 - 50 100 - 200 12.7 - 63.5 < 400 43 mm
Size 17 DS 15.8 - 127 50 - 350 12.7 - 63.5 < 400 43 mm
Size 23 4 - 50 300 - 880 12.7 - 63.5 < 500 57 mm
Size 23 DS 12.7 - 127 150 - 880 12.7 - 63.5 < 500 57 mm
Size 34 12.7 - 127 400 - 2200 12.7 - 63.5 < 500 87 mm
Thumbnail of Captive

The captive actuators is designed for shorter strokes up to about 8cm. It has a threaded drive screw held mostly inside the motor body connected to a spline. It has a built-in anti-rotation through the use of a spline shaft that allows it to extend and retract as a unit with no requirements for additional anti-rotation. The basic design is least tolerant of system misalignment and is the most protective actuator style because it is self-contained. The captive has the longest basic body style.

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Thumbnail of Non-captive

It has a lead screw going through the motor and has no reasonable stroke limits but must be attached to an assembly that will not rotate. This will then allow the lead screw to extend and retract without rotating. The screw can travel freely in and out of the motor body. In certain setups the motor may serve as the drive and the nut in the assembly. The anti-rotation is by the attachment point and is commonly a cut or machined thread on the end of the screw. The non-captive is potentially the shortest overall length assembly.

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Thumbnail of External lineair

It has a rotating screw with an external drive nut that can be mounted to a carriage assembly. The screw is part of the rotor, so it rotates with respect to the motor body. Linear motion is created by the nut traversing back and forth on the lead screw as the lead screw turns. A common end feature of the screw is a bearing journal. External linear motors are most akin to motorized rails where the nut is replaced by a driven carriage assembly.

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