Premier spherical roller bearings our vast experience

Technical information:
fundamentals
Standards
The SNR Premier spherical roller bearings meet
the requirements in the DIN 635-2 and ISO 15
standards.
Misalignment
The SNR Premier spherical roller bearings admit
misalignment to the order of 0.5°, without reduction
in service life. However, this angle must be limited in
order to remain within values in keeping with the
sealing system used.
Tolerances
The SNR Premier spherical roller bearings are delivered
in standard precision class: ISO 492 standard.
Upon request, SNR can deliver bearings with reduced
tolerances, on one or more characteristics
(bore, outer diameter, rotation precision, inner ring,…).
The EF800 range features tight tolerances on the
outer diameter and the bore, as well as the reduced
internal clearance tolerance. They provide better
control of the residual play after installation, which
must remain as low as possible.
Inner ring – Reduced bore tolerances
Dimensions in mm
Nominal bore greater than 30 50 80 120 180
up to 50 80 120 180 250
Micron-scale differences
Cylindrical bore d m , d 0 0 0 0 0
-7 -9 -12 -15 -18
Tapered bore d 25 30 35 40 46
0 0 0 0 0
Width B 0 0 0 0 0
-120 -150 -200 -250 -300
Outer ring – Reduced tolerances on the outside diameter
Dimensions in mm
Nominal outside greater than 80 120 150 180 250 315 400 500
Diameter up to 120 150 180 250 315 400 500 630
Micron-scale differences
Outside D m , D -5 -5 -5 -10 -10 -13 -13 -15
diameter -13 -13 -18 -23 -23 -28 -30 -35
The outer ring has the same width tolerance as the inner ring.
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