These three-bolt bracket flanged ball bearing units are compliant with Japanese Industrial Standards (JIS). They consist of an insert bearing, with an extended inner ring and are locked to the shaft by an adapter sleeve, which enables the bearings to operate at higher speeds and run more smoothly in applications where the direction of rotation is constant or alternating. The bearing is mounted in a cast iron housing, which can be bolted to a machine wall or frame. Ball bearing units can accommodate moderate initial misalignment, but normally do not permit axial displacement. The adapter sleeve is not included in the unit and should be ordered separately.
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Order adapter sleeve separately
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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 |
10 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 |
38 mm
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Width of sleeve |
| J |
40 mm
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Distance between attachment bolt holes |
| J1 |
29 mm
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Distance between attachment bolt holes |
| H |
137 mm
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Overall height |
| H1 |
50 mm
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Radial position of the spherical seat |
| L |
83 mm
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Overall length |
| L1 |
70 mm
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Flange length |
| N |
9.5 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 |
40.95 mm
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Overall unit width |
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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 |
21 mm
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Axial position of the housing thread |
| Rα |
45 °
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Angular position of the housing thread |
| DN |
6.6 mm
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Diameter of head sphere of grease fitting |
|---|---|---|
| GN |
1/4-28 UNF
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Thread of grease fitting |
| SWN |
7.94 mm
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Hexagonal key size for the 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 |
8 mm
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| Recommended diameter for attachment bolts, inch | G |
0.3125 in
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