Single equivalent load

Baseline L10 life

Inputs

Bearing typeSelect the basic exponent only; equivalent load remains user-entered.

Dynamic ratingCPublished basic dynamic load rating for the specific bearing.

Equivalent loadPUser-entered equivalent dynamic load under stated operating conditions.

Rotational speednConstant shaft speed for the time conversion.

Basic L10 life

67.047

million rev

Dynamic-rating to equivalent-load ratio

4.0625

—

L10 = (C/P)³; hours = L10·10⁶/(60n)

A first-pass number, not a code check, certification, or approval. Read the method and its limits below. What this is and is not.

Calculation snapshot

Formula version 1.0.0

Basic L10 life	67.047 million rev
Basic L10 life	770.66 h
Dynamic-rating to equivalent-load ratio	4.0625 —

L10 = (C/P)³ · hours = L10·10⁶/(60n)

NHBB load-rating reference: https://www.nhbb.com/knowledge-center/engineering-reference/ball-roller-bearings/load-ratings-bearing-life

This printout is a record of displayed inputs and deterministic formula output. It is not an approval, certification, or engineering conclusion.

Method

Estimate basic L10 rating life from dynamic rating, one equivalent load, rotational speed, and bearing type.

L10 = (C/P)³; hours = L10·10⁶/(60n)

When

Don’t

This is a baseline statistical L10 rating-life screen for one entered equivalent load and constant speed. It excludes load-spectrum effects, lubrication, contamination, temperature, misalignment, shock, reliability adjustment, mounting, and manufacturer-specific life factors.