Use this engineering calculation for a transparent preliminary estimate or independent arithmetic check when geometry, materials, loads, operating conditions, and units are defined consistently.

Dynamic Load Rating Newtons (N)

Required number input.

Equivalent Load Newtons (N)

Required number input.

Life Exponent

Required number input.

Basic bearing L10 rating life in revolutions: 10⁶(C/P)^p from dynamic load rating, equivalent load and chosen bearing exponent. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

L10 Revolutions (rev)

The resulting l10 revolutions returned as a number.

• L10 life is a statistical rating based on dynamic load and standard assumptions. Lubrication, contamination, alignment, preload, temperature, speed, shock, installation, material reliability, and duty-cycle integration can dominate actual service life.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check assumptions against drawings, measurements, current material data, and the applicable design code. Apply required load combinations and safety factors, then obtain qualified review and testing for consequential designs.

• Pavement Esal

  Equivalent single-axle load count from traffic axle repetitions times a supplied equivalency factor; factor must come from a chosen method.

• Soil Bearing Pressure

  Average contact pressure from a centered vertical load divided by foundation footprint area; no eccentricity or soil capacity check.

• Taylor Tool Life

  Taylor machining tool life T=(C/V)^(1/n) for empirical constant C and exponent n calibrated to the same speed units.