Running accuracy

Running accuracy constitutes the acceptable values for inner and outer ring radial runout of bearing and axial runout, inner ring side runout, and outer ring outer diameter runout.

Running accuracy

Characteristic toleranceMeasurement method
Inner ring radial runout (Kia)For inner ring radial runout, record the total indicator reading (TIR).
Outer ring radial runout (Kea)For outer ring radial runout, record the total indicator reading (TIR) after one revolution.
Inner ring axial runout (Sia)For inner ring axial runout, record the total indicator reading (TIR) after rotating the inner ring one revolution.
Outer ring axial runout (Sea)For outer ring axial runout, record the total indicator reading (TIR) after rotating the outer ring one revolution.
Inner ring side runout with bore (Sd)For inner ring side runout with bore, record the total indicator reading (TIR) after rotating the inner ring one revolution with a tapered mandrel.
Outer ring outside surface inclination (SD)For outer ring outside surface inclination, record the total indicator reading (TIR) after aligning the ring with the reinforcing plate and rotating it one revolution.