Bearings
Every bearings calculator on CalcEngines — each with its formula, a worked example, the standard it follows and the assumptions it makes.
8 calculators in this section
- Bearing Defect Frequency CalculatorBPFO, BPFI, BSF and FTF derived from the bearing's own rolling kinematics, in hertz and in orders — with the BPFO + BPFI = Z × shaft speed identity printed live, the 0.4Z rule's exact error, and the slip band you actually search in.
- Bearing Duty Cycle and Cubic Mean Load CalculatorThe cubic mean load for a varying duty cycle, with each segment's share of the DAMAGE printed beside its share of the time — and with Miner's rule run the other way as a check.
- Bearing Equivalent Load CalculatorP = X·F_r + Y·F_a, with the limit e that X and Y switch at — and with e itself moving as F_a/C₀ changes on a deep groove bearing. Plus the thrust a taper pair makes for itself, the static safety factor and the minimum load.
- Bearing Fits and Shaft Tolerance CalculatorThe ring with the rotating load gets the interference fit — then the actual interference range from the ISO 286 bands AND the bearing's own minus-toleranced bore, and how much internal clearance that interference eats.
- Bearing Life L10 CalculatorL10 = (C/P)^p in millions of revolutions and in hours, with p = 3 for ball and 10/3 for roller bearings — plus the load lever, both published a₁ tables, and the rating C a catalogue must show for your target life.
- Bearing Preload and Axial Play CalculatorResidual radial clearance after mounting: the clearance class, less what the interference fit eats, less what the temperature difference between the rings eats — with the back-to-back against face-to-face comparison that decides what a preload does when it warms.
- Bearing Relubrication Interval and Grease Quantity CalculatorThe grease interval from the published closed form, halved for every 15 °C above 70, with the dose G = 0.005·D·B, the bearing's own free space from its catalogue mass, and the viscosity ratio κ the a_ISO chart needs.
- Plain Bearing PV Limit CalculatorPV = p·v on the PROJECTED area for a dry or boundary-lubricated bush, with sourced PV, pressure and velocity limits for eleven materials — and the minimum bush length the longest of the three demands.