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Bearing Tolerance Symbols & Definitions

d/ds Nominal bore diameter/Single bore diameter
dmp Mean bore diameter; arithmetical mean of the largest & smallest single bore diameters measured in one radial plane
dmp dmp-d; Deviation of mean bore diameter from the nominal dimension
ds ds-d; deviation of single bore diameter from the nominal dimension
Vdp Bore diameter variation; difference between the largest & smallest single bore diameters in one radial plane
Vdmp dmp max-dmp min; Mean bore diameter variation; difference between the largest & smallest mean bore diameters
D/DS Nominal outside diameter/Single outside diameter
Dmp Mean outside diameter; arithmetical mean of the largest & smallest single outside diameters in one radial plane
dmp Dmp-D; Deviation of mean outside diameter from nominal dimension
Ds Ds-D; Deviation of mean outside diameter from nominal dimension
Vdp Outside diameter variation; difference between the largest & smallest single outside diameter in one radial plane
VDmp Dmp max-Dmp min; Mean outside diameter variation; difference between the largest & smallest mean outside diameters
Bs/Cs Single inner ring/outer ring width
Bs Bs-B; Deviation of a single inner ring width from nominal dimension
Cs Cs-C; Deviation of a single outer ring width from nominal dimension
VBs Bs max-Bs-min; Variation of inner ring widths; difference between the largest & smallest single inner ring width
VCs Cs max-Cs min; Variation of outer ring widths; difference between the largest & smallest single outer ring width
B,C,T Nominal bearing width/height
Ts Actual bearing width/height
Ts Deviation of the actual bearing width/height
Kia Radial runout of assembled bearing inner ring
Kea Radial runout of assembled bearing outer ring
Sd Side face runout of inner ring with reference to bore
SD Variation in inclination of outside cylindrical surface to outer ring side face
Sia Axial runout; assembled bearing inner ring face runout with raceway
r Norminal chamfer dimension
rs Radial/axial single chamfer dimension
rs min Smallest radial/axial single chamfer dimension
rs max Largest radial/axial single chamfer dimension

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