Technical Guide Choosing 6V Dualshaft Selflocking Gear Motors

The motor is typically built with a dual-shaft output design, allowing it to drive two independent load systems at the same time or to provide more flexible installation options in complex transmission layouts. Its self-locking feature is a central characteristic: when power is removed, the gearbox can hold the output shaft in position and prevent reverse rotation caused by external forces.

That capability is important for automated devices that must maintain a specific angle or position after the motor stops. The rated voltage is 6V DC, and the rated speed is 2100 rpm, according to the specifications.

When selecting this type of motor, voltage and rated speed are not the only factors to assess. Load characteristics also require close attention. Because the self-locking function relies on the internal reduction gear set, friction within the gearbox is relatively high, and designs must leave sufficient torque margin.

The dual-shaft output adds installation flexibility, but it also means that load balance has a direct effect on motor life. Loads at the two output ends should be kept as even as possible to avoid uneven axial force and accelerated gear wear.

Self-locking performance is not unlimited. Its capacity depends on the transmission ratio of the gearbox and the friction between gears. If the reverse torque generated by the load exceeds the static friction limit of the gear set, the motor may still slide slowly. Testing under extreme load conditions is therefore advisable.

For dual-shaft installations, the loads at both ends must be mounted with a high degree of coaxiality. Excessive installation deviation can produce additional radial load and significantly reduce the service life of the motor bearings and gears. The 2100 rpm figure generally refers to output-shaft speed at the rated 6V voltage under no-load or rated-load conditions; in practice, speed declines as load increases.