Page 708 - SKF-bearing-housings

Inch roller bearing units SYE, SYR, FYE and FYR series

Axial holding power Table 8
The axial holding power of SKF ConCentra Axial holding power of collar-mount roller bearing
roller bearing units depends on the friction units
between the shaft and locking device. It is Shaft diameter Set screws Axial
therefore also dependent on the number of set from to Number Size Tightening holding
power 1)
torque
(grub) screws in the mounting collar
(† table 7). in. – in-lbf. lbf.
For collar-mount units, the axial holding
power is determined by the size of the set 1 7 /16 2 3 /16 2 3 /8" – 24 250 515
2 7 /16 3 1 /2 2 1 /2" – 20 620 900
(grub) screws († table 8). The values are 3 11 /16 4 2 5 /8" – 18 1 325 1 200
valid for unhardened shafts after the set 4 7 /16 4 15 /16 4 5 /8" – 18 1 325 2 400
screws have been tightened to the recom-
mended torque value.
When mounted correctly, the bearing units
can withstand typical shock loads equivalent
to the requisite axial holding force. However, 1) Not equivalent to the axial load carrying capacity of the
bearing unit.
the axial load carrying capacity of the bearing
unit can be limited by the bearing.
Table 9
Radial internal clearance of bearings in SKF ConCentra
Radial internal clearance roller bearing units
The clearance values for bearings in SKF inch Shaft diameter Radial internal clearance
roller bearing units are provided in tables 9 from to min. max.
and 10. The values are valid for unmounted in. in.
units under zero measuring load.
1 7 /16 1 1 /2 0.0020 0.0026
1 11 /16 2 0.0024 0.0031
2 3 /16 2 1 /2 0.0030 0.0037
2 11 /16 3 0.0037 0.0047
3 7 /16 4 0.0043 0.0055

Table 7 Table 10
Axial holding power of SKF ConCentra roller bearing Radial internal clearance of bearings in collar-mount
units roller bearing units
Shaft diameter Set screws Axial holding Shaft diameter Radial internal clearance
from to Number Tightening power 1) from to min. max.
torque
in. in.
in. – in-lbf. lbf.
1 7 /16 1 1 /2 0.001 0.002
1 7 /16 2 3 /16 3 66 3 350 1 11 /16 2 0.0012 0.0022
2 7 /16 2 3 /4 4 66 4 500 2 3 /16 2 1 /2 0.0014 0.0026
2 15 /16 3 15 /16 5 66 5 600
2 11 /16 3 0.0018 0.0031
3 3 1 /2 4 66 4 500 3 7 /16 4 0.0024 0.0039
3 7 /16 4 7 66 7 850 4 7 /16 4 1 /2 0.0028 0.0047
4 15 /16 5 0.0035 0.0057
1) Not equivalent to the axial load carrying capacity of the
bearing unit.

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