| Bearing number |
7208 ACD/P4A |
| Size (mm) |
80x40x18 |
| Bore Diameter (mm) |
80 |
| Outer Diameter (mm) |
40 |
| Width (mm) |
18 |
| d |
40 mm |
| D |
80 mm |
| B |
18 mm |
| d1 |
53.3 mm |
| d2 |
53.3 mm |
| D1 |
66.7 mm |
| r1,2 - min. |
1.1 mm |
| r3,4 - min. |
0.6 mm |
| a |
23.1 mm |
| da - min. |
47 mm |
| db - min. |
47 mm |
| Da - max. |
73 mm |
| Db - max. |
75.8 mm |
| ra - max. |
1 mm |
| rb - max. |
0.6 mm |
| dn |
56.2 mm |
| Basic dynamic load rating - C |
31.9 kN |
| Basic static load rating - C0 |
22.8 kN |
| Fatigue load limit - Pu |
0.98 kN |
| Limiting speed for grease lubrication |
16000 r/min |
| Limiting speed for oil lubrication |
26000 mm/min |
| Ball - Dw |
11.112 mm |
| Ball - z |
14 |
| Gref |
4.725 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 |
200 N |
| Preload class B - GB |
400 N |
| Preload class C - GC |
800 N |
| Preload class D - GD |
1600 N |
| Calculation factor - f |
1.05 |
| 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 |
127 N/micron |
| Preload class B |
165 N/micron |
| Preload class C |
218 N/micron |
| Preload class D |
294 N/micron |
| Category |
Precision Ball Bearings |
| Inventory |
0.0 |
| Minimum Buy Quantity |
N/A |
| Weight / Kilogram |
0.359 |
| 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 |
40MM Bore; 80MM Outside Diameter; 18MM 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 |
| Outside Diameter |
3.15 Inch | 80 Millimeter |
| Bore |
1.575 Inch | 40 Millimeter |
| Width |
0.709 Inch | 18 Millimeter |
| r1,2 min. |
1.1 mm |
| r3,4 min. |
0.6 mm |
| da min. |
47 mm |
| db min. |
47 mm |
| Da max. |
73 mm |
| Db max. |
75.8 mm |
| ra max. |
1 mm |
| rb max. |
0.6 mm |
| Basic dynamic load rating C |
31.9 kN |
| Basic static load rating C0 |
22.8 kN |
| Fatigue load limit Pu |
0.98 kN |
| Attainable speed for grease lubrication |
16000 r/min |
| Attainable speed for oil-air lubrication |
26000 r/min |
| Ball diameter Dw |
11.112 mm |
| Number of balls z |
14 |
| Reference grease quantity Gref |
4.725 cm³ |
| Preload class A GA |
200 N |
| Static axial stiffness, preload class A |
127 N/µm |
| Preload class B GB |
400 N |
| Static axial stiffness, preload class B |
165 N/µm |
| Preload class C GC |
800 N |
| Static axial stiffness, preload class C |
218 N/µm |
| Preload class D GD |
1600 N |
| Static axial stiffness, preload class D |
294 N/µm |
| Calculation factor f |
1.05 |
| 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 |
0.37 kg |