| Bearing number |
7211 ACD/P4A |
| Size (mm) |
100x55x21 |
| Bore Diameter (mm) |
100 |
| Outer Diameter (mm) |
55 |
| Width (mm) |
21 |
| d |
55 mm |
| D |
100 mm |
| B |
21 mm |
| d1 |
68.9 mm |
| d2 |
68.9 mm |
| D1 |
86.1 mm |
| r1,2 - min. |
1.5 mm |
| r3,4 - min. |
0.6 mm |
| a |
28.7 mm |
| da - min. |
64 mm |
| db - min. |
64 mm |
| Da - max. |
91 mm |
| Db - max. |
95.8 mm |
| ra - max. |
1.5 mm |
| rb - max. |
0.6 mm |
| dn |
72.6 mm |
| Basic dynamic load rating - C |
52.7 kN |
| Basic static load rating - C0 |
40.5 kN |
| Fatigue load limit - Pu |
1.7 kN |
| Limiting speed for grease lubrication |
13000 r/min |
| Limiting speed for oil lubrication |
20000 mm/min |
| Ball - Dw |
14.288 mm |
| Ball - z |
15 |
| Gref |
8.595 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 |
330 N |
| Preload class B - GB |
660 N |
| Preload class C - GC |
1320 N |
| Preload class D - GD |
2640 N |
| Calculation factor - f |
1.08 |
| Calculation factor - f1 |
0.99 |
| Calculation factor - f2A |
1 |
| Calculation factor - f2B |
1.01 |
| Calculation factor - f2C |
1.02 |
| Calculation factor - f2D |
1.05 |
| Calculation factor - fHC |
1 |
| Preload class A |
172 N/micron |
| Preload class B |
224 N/micron |
| Preload class C |
296 N/micron |
| Preload class D |
399 N/micron |
| Category |
Precision Ball Bearings |
| Inventory |
0.0 |
| Minimum Buy Quantity |
N/A |
| Weight / Kilogram |
0.606 |
| 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 | Super Precision | High Capacity Basic Design |
| Long Description |
55MM Bore; 100MM Outside Diameter; 21MM 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 Rac |
| UNSPSC |
31171531 |
| Harmonized Tariff Code |
8482.10.50.28 |
| Noun |
Bearing |
| Keyword String |
Ball Angular Contact |
| Outside Diameter |
3.937 Inch | 100 Millimeter |
| Width |
0.827 Inch | 21 Millimeter |
| Bore |
2.165 Inch | 55 Millimeter |
| r1,2 min. |
1.5 mm |
| r3,4 min. |
0.6 mm |
| da min. |
64 mm |
| db min. |
64 mm |
| Da max. |
91 mm |
| Db max. |
95.8 mm |
| ra max. |
1.5 mm |
| rb max. |
0.6 mm |
| Basic dynamic load rating C |
52.7 kN |
| Basic static load rating C0 |
40.5 kN |
| Fatigue load limit Pu |
1.73 kN |
| Attainable speed for grease lubrication |
13000 r/min |
| Attainable speed for oil-air lubrication |
20000 r/min |
| Ball diameter Dw |
14.288 mm |
| Number of balls z |
15 |
| Reference grease quantity Gref |
8.595 cm³ |
| Preload class A GA |
330 N |
| Static axial stiffness, preload class A |
172 N/µm |
| Preload class B GB |
660 N |
| Static axial stiffness, preload class B |
224 N/µm |
| Preload class C GC |
1320 N |
| Static axial stiffness, preload class C |
296 N/µm |
| Preload class D GD |
2640 N |
| Static axial stiffness, preload class D |
399 N/µm |
| Calculation factor f |
1.08 |
| Calculation factor f1 |
0.99 |
| Calculation factor f2A |
1 |
| Calculation factor f2B |
1.01 |
| Calculation factor f2C |
1.02 |
| Calculation factor f2D |
1.05 |
| 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 |
0.61 kg |