Motor sizing calculator
Pick a mechanism (screw/belt/rotary) → compute required torque, speed, inertia → stepper/servo hint.
How to use
- Enter the calculation conditions
Enter the dimensions, loads, speeds or operating conditions requested by the form.
- Run the calculation
The tool applies the formulas shown on this page to the entered values.
- Review the result
Review the resulting specification and checks, then verify them against the cited source, current standard and real operating conditions before use.
Core formula
J = (J_screw + m · (P/2π)²) / N²
Example using default values
J_a = 0.354; J_b = 0.507 → J = 0.86 × 10⁻⁴ kg·m² at N = 1
Source: Oriental Motor, Motor Sizing Calculations / Basics Parts 2–3.
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