Flanged ball bearing units consisting of an insert bearing mounted in a composite or cast metal housing that can be bolted to a machine wall or frame. In addition to being part of a unit, some flanged housings for insert bearings are available as separate components. The SKF assortment includes ball bearing units compliant with several industrial standards, meeting many requirements regarding bolt patterns and mechanisms for locking onto the shaft.
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| Compliance with standard |
JIS
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| Purpose specific |
For material handling applications
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| Material, housing |
Cast iron
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| Sealing, bearing |
Seal and flinger on both sides
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| Sealing type, bearing |
Contact, standard
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| Sealing, unit |
Optional end cover
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| Coating |
Without
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| d |
25 mm
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Bore diameter |
|---|---|---|
| d1 |
≈ 39.7 mm
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Outer diameter of inner ring |
| d3 |
45 mm
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Outside diameter of lock nut |
| A |
30 mm
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Overall width |
| A1 |
14 mm
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Flange width |
| A5 |
22.5 mm
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Standout of end cover |
| B |
28 mm
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Width of inner ring |
| B1 |
28 mm
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Overall bearing width |
| B1 |
38 mm
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Width of sleeve |
| Db1 |
80 mm
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Top external diameter |
| J |
83 mm
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Distance between attachment bolts |
| L |
108 mm
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Overall length |
| N |
12 mm
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Diameter of attachment bolt hole |
| s1 |
22.25 mm
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Distance from locking device side face to raceway centre |
| T |
40.25 mm
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Overall unit width |
|
Value specified for s1 is approximate and before the sleeve is driven into the bearing bore (sleeve and inner ring bore at starting position).
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| RG |
1/4-28 UNF
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Housing thread for grease fitting |
|---|---|---|
| R1 |
20.5 mm
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Axial position of the housing thread |
| DN |
6.6 mm
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Diameter of head sphere of grease fitting |
|---|---|---|
| SWN |
7.94 mm
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Hexagonal key size for the grease fitting |
| GN |
1/4-28 UNF
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Thread of grease fitting |
| Basic dynamic load rating | C |
19.5 kN
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|---|---|---|
| Basic static load rating | C0 |
11.2 kN
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| Fatigue load limit | Pu |
0.475 kN
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| Limiting speed |
5 000 r/min
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| Mass bearing unit |
1 kg
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| Associated spanner |
HN 6
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| Recommended lock nut tightening angle | α |
95 °
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| Recommended diameter for attachment bolts, mm | G |
10 mm
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| Recommended diameter for attachment bolts, inch | G |
0.375 in
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