Stepper motors

Can stack linear actuators

The can stack linear actuator creates translational motion with the simple operation of a stepper motor resulting in a cost effective and reliable motion solution. Achieving linear motion internal to the motor eliminates the cost of designing a transmission into the system, thus reducing the number of points for potential wear. Overall efficiency is improved by the linear stepper as a result of this reduction in external mechanical components. Linear stepper motors also hold their linear position without power, by utilizing the detent torque of the can stack motor, thus reducing the power requirements of the system when not in operation. There are two versions offered; captive and non captive. The available captive design reduces overall size and produces purely translational motion while the non-captive linear stepper design provides longer travel stroke. The ball bearing design provides extended life of the linear actuator motor and enables higher load carrying capability. Digital control makes the linear stepper motor easy to control with a microprocessor without the need for positional feedback, as long as the stepper motor actuator is sized properly. Winding voltages of 5 and 12 V are standard but typically the linear stepper motors are run with a chopper driver which controls the current supplied. This allows the voltage to the motor to be increased, which provides a higher capability for the maximum speed that the linear stepper motor will operate at. The current supplied will dictate the torque output and can be set to match the load requirement of the application. The can stack linear actuators can provide a linear force up to 124 mNm depending of the size.

Model   Diameter
Step Angle
Max. Force @ 0.0254 mm / Step
Max. Travel
Min. Holding Force @ 0.0254 mm / Step (Un-energised)

20DAM Portescap

20 15 ± 1 30.6 15 55.6

20DBM Portescap

20 7.5 35 50 13.9

26DAM Portescap

26 15 ± 1 33.4 13.2 55.6

26DBM Portescap

26 7.5 ± .5 35.6 13.2 55.6

35DBM Portescap

35 7.5 ± .5 28.9 17.9 11.1

42DBL Portescap

42 7.5 ± .5 102.9 24.1 111.2

57DBM Portescap

57 7.5 ± .5 124.6 76.2 89