SKF ConCentra - Product data - general

Product data – general
Dimensions
The boundary dimensions of SKF ConCentra
ball bearings are not standardized. However,
the outside diameter and the outer ring
width conform to ISO 9628:2006 so that
they are in most of the cases interchangeable
with the SKF Y-bearings in the YAR, YAT,
YEL, YET series. The sleeve bore diameter
of SKF ConCentra ball bearings is always
larger than the corresponding nominal value
before mounting so that they can slide easily
on the shaft, into their final position.
The boundary dimensions of SKF
ConCentra ball bearing housings conform to
ISO 3228:1993. The housings are
dimensionally interchangeable with SKF
Y-bearing plummer block housings in the SY
series, and Y-bearing flanged in the FY, FYT,
FYTB series.
Tolerances
SKF ConCentra ball bearings
The outside diameter of SKF ConCentra ball
bearings are produced to tolerances indicated
in table 1. Symbols used are explained in
the following.
Symbols
D Nominal outside diameter
D
Dmp
Deviation of the mean bore diameter
from the nominal
SKF ConCentra ball bearing
units with plummer block
housings (SY series)
The tolerances for the shaft centre height H
1
(† fig. 1) above the support surface are
±0,25 mm for metric units with a bore •
diameter up to and including 40 mm and
for all inch size units
±0,30 mm for larger metric units.•
The tolerance for the shaft centre height
corresponds to the values specified in ISO
3228:1993.
H
1
Fig. 1
T
Fig. 2
SKF ConCentra ball bearing
units with flanged housings
(FY, FYT, FYTB series)
The tolerance for the total width T of the unit
(† fig. 2) is:
±0,5 mm for units up to and including •
50 mm bore diameter
±0,6 mm for larger units•
Table 1
Tolerances for SKF ConCentra ball bearings
Nominal diameter
D D
Dmp
Over Incl. High Low
mm
μm
52 80 0 -10
85 130 0 -15
20