Maintenance Free with High Starting Torque

This rotary solenoid can be supplied in 12, 18, 24 and 36 positions.

A range of Uni-directional and Bi-directional stepping solenoids that employ an exclusive tooth clutch drive mechanism, providing a positive self-locking drive that contributes to a greater usable torque output. With a minimum life expectancy of 10 million steps on bi-directional, in each direction and a non-accumilative accuracy ±1° over it's life span it's a high performer. 

More about NSF Controls Stepping Solenoids: 

  • Positive action
  • Consistently high starting torque
  • High torque-to-size ratio
  • Over 25 steps per second in intermittent applications
  • Maintenance free lubricated, enclosed internal parts
  • Simple pulsed drive circuitry
  • Foot or flange mounts available

(Please note: where flange mounting is used for bi-directional models, consideration should be given to securing both sections of the solenoid if high inertia loads are to be positioned). 

 Click here to download the Stepping Solenoids Performance Table

The performance tables show four columns of typical operating conditions for a given unit. The first two “normal speed, extended period of operation”, presume the stepping solenoids will be pulsed on a continuous basis (round the clock under normal ambient temperature of 20°C with no provision to cool the coil). Here the pulse ‘OFF’ interval is calculated to allow sufficient cooling time (between pulses) to prevent thermal damage.

Most applications, however, call for the stepping solenoid to operate on an intermittent basis, allowing time for the coil to cool while the stepping solenoid is not working. This permits a decrease of the pulse ‘OFF’ interval and a subsequent increase in stepping speed.

The performance information was developed from tests with friction loads, which represent the most severe condition because a constant torque throughout the stroke is required. An inertia load requires a high initial starting torque and a braking action at the end – a task that the Series 50-L Stepping Solenoid is designed to handle. In addition to the clutch brake, it has built-in compensation to reduce velocity toward the end of each step.

The detent torque values shown in the Specifications have already been taken into consideration in the performance tables. Detent torque need only be considered when there is a load against the shaft with no power applied.

To find out more about NSF Controls Solenoids, click on the information below 

Solenoids For
Every Application

 Linear And Rotary


The NSF Controls product experts are available to help you select the most suitable product to meet your specific requirements and, if required, will work with you to design and produce a customised solution. 

To find out more, please contact our specialist Design & Engineering Team +44 (0)1535 661144 or email 

Contact Us Submit your Enquiry 


See Our Full Range

We supply a wide range of reliable, superior quality solenoids and switches, which also provide a sound basis for development of bespoke solutions.

Read more >

You’re in safe hands

Providing BIG solutions

Big partnerships; BIG commitment. NSF Controls produces over 1m assemblies per annum from its UK site.

Read more >