plaquette MACHLINE - Ntn-snr.com
plaquette MACHLINE - Ntn-snr.com
plaquette MACHLINE - Ntn-snr.com
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Tolerances and precision classes<br />
Ring tolerance<br />
Spindle precision in rotation has a direct influence<br />
on machining precision. SNR manufactures bearings<br />
in very high precision class P4S and super<br />
precision class ISO 2.<br />
Inner ring<br />
Tolerances in µm<br />
Bore (d) in mm<br />
Exclusive 6 10 18 30 50 80 120 150 180<br />
Inclusive 10 18 30 50 80 120 150 180 250<br />
Tolerances Symbol (1)<br />
Tolerance<br />
on mean<br />
∆ dmp<br />
ISO 4<br />
0 0 0 0 0 0 0 0 0<br />
-4 -4 -5 -6 -7 -8 -10 -10 -12<br />
diameter 0 0 0 0 0 0 0 0 0<br />
ISO 2<br />
-2,5 -2,5 -2,5 -2,5 -4 -5 -7 -7 -8<br />
Roundness<br />
Series 719 ISO 4 4 4 5 6 7 8 10 10 12<br />
max. Vdp ISO 2 2,5 2,5 2,5 2,5 4 5 7 7 8<br />
Series 70-72<br />
ISO 4 3 3 4 5 5 6 8 8 9<br />
ISO 2 2,5 2,5 2,5 2,5 4 5 7 7 8<br />
Taper<br />
max. Vdmp<br />
ISO 4 2 2 2,5 3 3,5 4 5 5 6<br />
ISO 2 1,5 1,5 1,5 1,5 2 2,5 3,5 3,5 4<br />
Radial ISO 4 2,5 2,5 3 4 4 5 6 6 8<br />
max. K ia<br />
run-out<br />
ISO 2 1,5 1,5 2,5 2,5 2,5 2,5 2,5 5 5<br />
Face run-out ISO 4 3 3 4 4 5 5 6 6 7<br />
max. S d<br />
with respect to bore<br />
ISO 2 1,5 1,5 1,5 1,5 1,5 2,5 2,5 4 5<br />
Raceway run-out ISO 4 3 3 4 4 5 5 7 7 8<br />
max. S<br />
with respect to face<br />
ia ISO 2 1,5 1,5 2,5 2,5 2,5 2,5 2,5 5 5<br />
Tolerance on ISO 4 0 0 0 0 0 0 0 0 0<br />
∆ Bs<br />
bearing width<br />
ISO 2 -40 -80 -120 -120 -150 -200 -250 -250 -300<br />
Alignment ISO 4 2,5 2,5 2,5 3 4 4 5 5 6<br />
of faces<br />
max. VBs<br />
ISO 2 1,5 1,5 1,5 1,5 1,5 2,5 2,5 4 5<br />
(1) Symbols for tolerances <strong>com</strong>ply with standard ISO 492<br />
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