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  • June 29, 2026

How to choose K-series helical gearbox



  1. 1.Select Structure Type

  • K: Foot-mounted, solid shaft

  • KA: Foot-mounted, hollow shaft

  • KF: B5 flange-mounted, solid shaft

  • KAF: B5 flange-mounted, hollow shaft

    2.Select Frame Size by Motor Power

    Match motor power to the power range of K37~K187 models.

    3.Check Output 

    TorqueCalculate torque with service factor (1.0~2.0 based on shock load). Ensure the value is below the rated max torque of the gearbox.

    4.Confirm Ratio & SpeedCalculate required ratio = motor speed ÷ output speed, pick the standard ratio. Keep speed deviation within ±3%.
    5.Verify Mounting DimensionsCheck overall dimension to fit installation space.

    Choose K/KA/KF/KAF mounting style. Select frame size by motor power. Calculate torque with proper service factor to avoid overload. Match standard reduction ratio and confirm installation dimensions.

    Gearbox, Speed Reducer

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