Page 545 - SKF-bearing-housings

Design considerations

Table 4 Operating speed
Position and size of dowel pin holes The seals can limit the permissible operating
speed. They are suitable for circumferential
speeds of up to 8 m/s. The corresponding
J 1 J 3
rotational speeds are listed in table 7 on
page 37. For speed limits of the bearing, refer
to the product information available online at
J 4
skf.com/bearings.
J 2
J 6
Attachment bolt recommendations
N 4
In typical applications, 8.8 class hexagon head
bolts in accordance with ISO 4014 can be used
together with washers in accordance with
J 5
ISO 7089 or 7090. SKF housings can with-
N 4
J 5 stand loads resulting from tightening the
attachment bolts to the torque values recom-
mended by bolt manufacturers († table 6,
page 544). They are valid for oiled, but other-
wise untreated, thread surfaces.
J 6
If the bearing arrangement is subjected to
heavy radial loads, it may be necessary to use
stronger, 10.9 class bolts.
SKF cannot guarantee that tightening to the
recommended value will provide sufficient
anchoring. Make sure that attachment bolts,
dowels or stops, shoulder or guide ring can
Housing Dimensions
Size J 1 J 2 J 3 J 4 J 5 J 6 N 4 accommodate all occurring loads.
max
– mm
11
FNL 505 44 12 33 32 12 44 5
FNL 506 51 13 37 37 13 51 5
FNL 507 57 16 42 41 15 57 5
FNL 508 65 17 48 47 16 66 6
FNL 509 71 20 53 52 18 72 6
FNL 510 71 20 53 52 18 72 6
FNL 511 77 21 57 56 21 77 6
FNL 512 84 22 62 61 22 84 8
FNL 513 90 24 66 66 24 90 8
FNL 515 – – – – 85 55 8
FNL 516 – – – – 87 54 8
FNL 517 – – – – 93 63 8
FNL 518 – – – – 95 60 8
FNL 520 – – – – 112 72 8
FNL 522 – – – – 122 78 8

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