Bearings, Gears & Power Transmission worked example

Power Transmission Warranty Return Rate at 1% target maximum return rate: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop target maximum return rate to 1%, then walk the calculation through step by step. Calculate warranty return rate for bearings, gearboxes, reducers, or drive components from returned units, shipped population, and target return rate.

The inputs for this scenario

  • Confirmed warranty returns: 38 returns (held at the documented default)
  • Shipped or installed population: 12,500 units (held at the documented default)
  • Target maximum return rate: 1 % (the input this scenario stresses; the baseline uses 0.25)

Working through the calculation

  • The calculation starts from the formula this tool documents: Warranty return rate = confirmed warranty returns รท shipped or installed population.
  • Warranty return rate works out to 0.3 % warranty returns at these inputs, and this is the headline figure for the scenario.
  • Return-rate gap to target works out to 0.7 points at these inputs.
  • Confirmed warranty returns works out to 38 returns at these inputs.
  • Shipped or installed population works out to 12,500 units at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where target maximum return rate sits at 0.25% and the headline result is 0.3 % warranty returns, this scenario lands almost exactly on the baseline at 0.3 % warranty returns.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to target maximum return rate, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. Returns lag shipments, so a low rate on a recently shipped population can hide failures that surface only after months of duty cycle and lubrication breakdown.

Results at a glance

  • Warranty return rate: 0.3 % warranty returns (headline result)
  • Return-rate gap to target: 0.7 points
  • Confirmed warranty returns: 38 returns
  • Shipped or installed population: 12,500 units

Run it with your numbers

  • To rerun this with your own numbers, open the live Power Transmission Warranty Return Rate calculator, set target maximum return rate to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.