curl --request POST \
  --url https://api.iotools.cloud/v1/tool/bearing-life-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "bearingType": "ball",
  "dynamicLoadRating": "25",
  "equivalentLoad": "5",
  "speed": "1500",
  "hoursPerDay": "24"
}
'

{
  "tool": "bearing-life-calculator",
  "tool_version": "1.0.1",
  "outputs": {
    "results": [
      {
        "quantity": "Bearing type",
        "value": "Ball bearing"
      },
      {
        "quantity": "Life exponent (p)",
        "value": "3"
      },
      {
        "quantity": "Load ratio (C ÷ P)",
        "value": "5"
      },
      {
        "quantity": "L10 life",
        "value": "125 million revolutions"
      },
      {
        "quantity": "L10h life",
        "value": "1388.89 hours"
      },
      {
        "quantity": "Service life at duty cycle (days)",
        "value": "57.8704"
      },
      {
        "quantity": "Service life at duty cycle (years)",
        "value": "0.158549"
      }
    ],
    "breakdown": "L10 = (C ÷ P)^p = (25 ÷ 5)^3 = 5^3 = 125 million rev\nL10h = L10 × 10⁶ ÷ (60 × n) = 125 × 10⁶ ÷ (60 × 1500) = 1388.89 hours\nAt 24 h/day: 57.8704 days ≈ 0.158549 years\nL10 is the basic rating life — 90% of an identical bearing population reaches or exceeds it. Actual life varies with lubrication, contamination, alignment and load variation."
  },
  "credits_used": 3,
  "credits_remaining": null
}