Home > En > NSK - Bearing handbook > Formulation of bearing number
Basic numbers Auxiliary symbols
Special specification symbols
Symbol Meaning
Bearings treated for dimensional stabilization
X26 Working temperature lower than 150 C
X28 Working temperature lower than 200 C
X29 Working temperature lower than 250 C
(Spherical roller bearings)
S11 Working temperature lower than 200 C

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