| Bearing number |
71910 ACD/P4A |
| Size (mm) |
72x50x12 |
| Bore Diameter (mm) |
72 |
| Outer Diameter (mm) |
50 |
| Width (mm) |
12 |
| d |
50 mm |
| D |
72 mm |
| B |
12 mm |
| d1 |
57.1 mm |
| d2 |
57.1 mm |
| D1 |
64.9 mm |
| r1,2 - min. |
0.6 mm |
| r3,4 - min. |
0.3 mm |
| a |
20.3 mm |
| da - min. |
53.2 mm |
| db - min. |
53.2 mm |
| Da - max. |
68.8 mm |
| Db - max. |
70.6 mm |
| ra - max. |
0.6 mm |
| rb - max. |
0.3 mm |
| dn |
58.7 mm |
| Basic dynamic load rating - C |
12.7 kN |
| Basic static load rating - C0 |
9.8 kN |
| Fatigue load limit - Pu |
0.415 kN |
| Limiting speed for grease lubrication |
16000 r/min |
| Limiting speed for oil lubrication |
26000 mm/min |
| Ball - Dw |
6.35 mm |
| Ball - z |
25 |
| Gref |
1.74 cm3 |
| Calculation factor - e |
0.68 |
| Calculation factor - Y2 |
1.41 |
| Calculation factor - Y0 |
0.76 |
| Calculation factor - X2 |
0.67 |
| Calculation factor - Y1 |
0.92 |
| Preload class A - GA |
80 N |
| Preload class B - GB |
160 N |
| Preload class C - GC |
320 N |
| Preload class D - GD |
640 N |
| Calculation factor - f |
1.13 |
| Calculation factor - f1 |
0.98 |
| Calculation factor - f2A |
1 |
| Calculation factor - f2B |
1.04 |
| Calculation factor - f2C |
1.08 |
| Calculation factor - f2D |
1.14 |
| Calculation factor - fHC |
1 |
| Preload class A |
105 N/micron |
| Preload class B |
137 N/micron |
| Preload class C |
180 N/micron |
| Preload class D |
240 N/micron |
| Category |
Precision Ball Bearings |
| Inventory |
0.0 |
| Minimum Buy Quantity |
N/A |
| Product Group |
B04270 |
| Enclosure |
Open |
| Precision Class |
ABEC 7 | ISO P4 |
| Material - Ball |
Steel |
| Number of Bearings |
1 (Single) |
| Contact Angle |
25 Degree |
| Preload |
None |
| Raceway Style |
1 Rib Outer Ring |
| Cage Material |
Phenolic |
| Rolling Element |
Ball Bearing |
| Flush Ground |
No |
| Inch - Metric |
Metric |
| Other Features |
Single Row | Angular Contact | High Capacity Basic Design |
| Long Description |
50MM Bore; 72MM Outside Diameter; 12MM Width; Open Enclosure; ABEC 7 | ISO P4 Precision; Steel Ball Material; 1 (Single) Bearing; 25 Degree Contact Angle; Phenolic Cage Material; 1 Rib Outer Ring Race |
| UNSPSC |
31171531 |
| Harmonized Tariff Code |
8482.10.50.28 |
| Noun |
Bearing |
| Keyword String |
Ball Angular Contact |
| Width |
0.472 Inch | 12 Millimeter |
| Bore |
1.969 Inch | 50 Millimeter |
| Outside Diameter |
2.835 Inch | 72 Millimeter |
| r1,2 min. |
0.6 mm |
| r3,4 min. |
0.3 mm |
| da min. |
53.2 mm |
| db min. |
53.2 mm |
| Da max. |
68.8 mm |
| Db max. |
70.6 mm |
| ra max. |
0.6 mm |
| rb max. |
0.3 mm |
| Basic dynamic load rating C |
12.7 kN |
| Basic static load rating C0 |
9.8 kN |
| Fatigue load limit Pu |
0.415 kN |
| Attainable speed for grease lubrication |
16000 r/min |
| Attainable speed for oil-air lubrication |
26000 r/min |
| Ball diameter Dw |
6.35 mm |
| Number of balls z |
25 |
| Reference grease quantity Gref |
1.74 cm³ |
| Preload class A GA |
80 N |
| Static axial stiffness, preload class A |
105 N/µm |
| Preload class B GB |
160 N |
| Static axial stiffness, preload class B |
137 N/µm |
| Preload class C GC |
320 N |
| Static axial stiffness, preload class C |
180 N/µm |
| Preload class D GD |
640 N |
| Static axial stiffness, preload class D |
240 N/µm |
| Calculation factor f |
1.13 |
| Calculation factor f1 |
0.98 |
| Calculation factor f2A |
1 |
| Calculation factor f2B |
1.04 |
| Calculation factor f2C |
1.08 |
| Calculation factor f2D |
1.14 |
| Calculation factor fHC |
1 |
| Calculation factor e |
0.68 |
| Calculation factor (single, tandem) Y2 |
0.87 |
| Calculation factor (single, tandem) Y0 |
0.38 |
| Calculation factor (single, tandem) X2 |
0.41 |
| Calculation factor (back-to-back, face-to-face) Y1 |
0.92 |
| Calculation factor (back-to-back, face-to-face) Y2 |
1.41 |
| Calculation factor (back-to-back, face-to-face) Y0 |
0.76 |
| Calculation factor (back-to-back, face-to-face) X2 |
0.67 |
| Mass bearing |
0.13 kg |