Should pending claims be included?

Use confirmed claims for KPI reporting, or run a separate scenario including pending claims for risk review.

What if products have different warranty periods?

Separate product families or warranty periods so the population matches the return exposure.

What does a positive gap mean?

It means the actual return rate is above the target maximum and should be reviewed.

How can I use the result?

Use it to prioritize corrective action, supplier review, design changes, and warranty reserve discussions.

Bearings, Gears & Power Transmission calculator

Power Transmission Warranty Return Rate Calculator

Warranty returns reveal field issues such as bearing fatigue, seal leakage, gear tooth wear, lubrication failure, misalignment, overheating, and noise complaints. This calculator helps reliability, quality, and commercial teams compare return performance against an internal or customer target.

What this calculator does

Calculate warranty return rate for bearings, gearboxes, reducers, or drive components from returned units, shipped population, and target return rate.
a manufacturer or distributor needs to monitor warranty returns for bearings, gearboxes, couplings, belts, chains, or reducers
Returns warranty returns as a percentage of the matching shipped or installed population.

Formula used

Warranty return rate = confirmed warranty returns ÷ shipped or installed population
Return-rate gap to target = warranty return rate - target maximum return rate

Inputs explained

Confirmed warranty returns: Use accepted claims or confirmed returns for the same product family, customer, and warranty period.
Shipped or installed population: Use the matching shipped, sold, installed, or commissioned units that could generate those returns.
Target maximum return rate: Use the warranty KPI, customer limit, reliability goal, or field quality control limit.

How to use the result

Use it for field quality reviews, supplier scorecards, reliability projects, customer reporting, and spare parts planning.
It is only meaningful when return count, shipment population, product family, and time window are aligned; it does not diagnose failure mode.

Common questions

Should pending claims be included? Use confirmed claims for KPI reporting, or run a separate scenario including pending claims for risk review.
What if products have different warranty periods? Separate product families or warranty periods so the population matches the return exposure.
What does a positive gap mean? It means the actual return rate is above the target maximum and should be reviewed.
How can I use the result? Use it to prioritize corrective action, supplier review, design changes, and warranty reserve discussions.

Last reviewed 2026-05-12.