LINMOT has released a constant force spring (up to 60N) made from permanent magnetics.
With no electricity required for operation, the springs can deliver a constant force over their entire working stroke.
The springs are suitable for applications where weight load compensation, holding force or a constant force is required.
Mounting is said to be simple, with both the stationary and moving part magnet having threads in the axial plane. Made completely of stainless steel they are suitable for harsh environments.