Zenmai Motor

Maximizing the functionality and dynamic power of springs

The Zenmai motor allows the dynamic power of springs to be used more directly for a wider range of applications.
The motor shaft can be connected directly to a component, eliminating the need for an intermediate wire rope or drum.




Casing stores Zenmai (spring).

2.Mechanism to prevent reverse winding

Prevents reverse winding after the spring has completely unwound and the number of winding has reached zero.

3.Axe shaft (option)

Transfers the rotation to the attached component. (option)

4.Mechanism to prevent excess winding

Prevents damage that could be caused by winding the spring beyond its maximum number of permitted rotations.

5.Zenmai (spring)

Provides the driving force for the motor.


■Single type (1 spring)

Model Torque(N・m) Max. rotation Mass(kg)
ZS-08 0.8 15 1.3
ZS-16 1.6 12
ZS-24 2.4 10

■Double type(2 Springs)

Model Torque(N・m) Max. rotation Mass(kg)
ZW-16 1.6 15 2.3
ZW-32 3.2 12
ZW-48 4.8 10


Part No Name Model
LBP001953 Single axe shaft set Type ZS
LBP001954 Dual axes shafts set
LBP001955 Single axe shaft set Type ZW
LBP001956 Dual axes shafts set

※This picture includes axe shaft, shaft collars and keys.

Part No. Name Model
LBP001975 Shaft collars
(2 collars and 4 screws attached)
Type ZS, Type ZW

Installation Guidance

To install the main body, use grooves on body※1 or M5 bolt hole on the body flange side※2. We recommend commercial pre-assembly insertion 8mm nut for aluminum frame to groove.

Examples of Operations

1.To rotate wheels

Rotate the shaft in the direction of the red arrow.
When you release your hand, the shaft will rotate in the direction of the yellow arrow on the opposite side.

2.Installation of the arm

Push down the arm in the direction of the red arrow.
When you release your hand, the energy in the yellow arrow will occur.

List of product applications

(When used with a variety of applications,) it can be used as a power resources to wide range of systems.