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Knob Torque Tangential Finger Force Tool

Calculate knob torque tangential finger force from explicit caller-supplied inputs.

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Description

Divide signed torque by positive radius for force.

A supplied reach envelope, force arm, or hand-clearance dimension is a geometric input rather than a population-based ergonomic standard. Users and operating conditions can vary substantially.

Divide signed torque by positive radius for force.

When to use this tool

Use Knob Torque Tangential Finger Force when you need one explicit human-interface geometry or force term.

How to use the tool and how it works

  1. Enter torque, radius. Use the units and conventions below.
  2. Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
  3. Read force. Use the output convention below.

Divide signed torque by positive radius for force.1

Input fieldMeaning and unitsAccepted input
torqueTorqueRequired. Finite number.
radiusRadiusRequired. Finite number; strictly above 0.
Output fieldInterpretationReturned shape
forceForceRequired. Finite number.
json
{
  "input": {
    "torque": 0.6,
    "radius": 0.03
  },
  "output": {
    "force": 20
  }
}

Limitations and assumptions

  • Coherent N·m and meters produce newtons; this assumes a perpendicular tangential force and does not establish comfortable or safe human effort.
  • Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
  • Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.

Alternative or Complementary methods

Use an appropriate ergonomic and accessibility assessment with representative users and actual operating conditions.

References

  1. Calculation and input contract: industrial-design/knob-torque-tangential-finger-force — tool.io

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