>> P.38
Measurement methodsAccuracy and definitionsSingle bore diameter of rolling element complementFasten the master gauge to a surface plate.Position the bearing on the master gauge and apply the indicator in the radial direction near the middle of the width on the ring outside surface.Measure the amount of movement of the outer ring in the radial direction by applying sufficient load on the outer ring in the same radial direction as that of the indicator and in the opposite radial direction.Record indicator readings at the extreme radial posi-tions of the outer ring. Rotate the bearing and repeat the measurement in several different angular posi-tions to determine the largest and the smallest read-ings, Fws max and Fws min.FwsIn radial bearings without inner rings, the distance Single bore between two parallel straight lines touching the diameter of roller intersection of the inscribed circle of roller complement complementand the radial plane.Measuring loadFws minSmallest single bore diameter of roller complementMastergaugeZero the gauge indicator to the appropriate height from the reference surface using gauge blocks or a master.Support one face of the inner or outer ring on three equally spaced fixed supports of equal height and provide two suitable radial supports on the bore or outside surface set at 90° to each other to centre the inner or outer ring.Position the indicator against the other face of the ring opposite one fixed support.Rotate the inner or outer ring one revolution and measure and record the largest and the smallest single inner (outer) ring width, Bs max and Bs min, (Cs max and Cs min).∆BsDeviation of a single inner ring widthVBsVariation of inner ring width∆CsDeviation of a single outer ring widthVCsVariation of outer ring widthIn radial bearings without inner rings, the minimum value of the single bore diameter of roller complement.Remark Diameter of a cylinder where the smallest single bore diameter of roller complement has zero radial clearance in at least one radial direction.Deviation of single inner ring width and nominal inner ring width.∆Bs=Bs-BDeviation of the maximum and minimum values of the single inner ring width for individual inner rings.VBs=Bs max-Bs minDeviation of single outer ring width and nominal outer ring width.∆Cs=Cs-CDeviation of the maximum and minimum values of the single outer ring width for individual outer rings.VCs=Cs max-Cs minSupport the bearing on a surface plate. Zero the gauge indicator to an appropriate height from the sur-face plate using gauge blocks or a master.Place a plate of known thickness on the bearing assembly, apply a dynamically stable coaxial load, and position the indicator over the centre of the plate.Rotate the housing washer several times, to be sure to reach the smallest height, and take indicator readings.Disk masterDeviation of actual bearing height and nominal bearing height of the thrust bearing.∆TsDeviation of the actual bearing height∆Ts=Ts-TTs:Actual bearing heightT :Nominal bearing heightInner ring widthOuter ring widthBearing heightA35
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