| Bearing number |
71908 ACE/P4A |
| Size (mm) |
40x62x12 |
| Bore Diameter (mm) |
40 |
| Outer Diameter (mm) |
62 |
| Width (mm) |
12 |
| d |
40 mm |
| D |
62 mm |
| B |
12 mm |
| C |
12 mm |
| d1 |
46.5 mm |
| d2 |
44.8 mm |
| r1 min. |
0,6 mm |
| r2 min. |
0,6 mm |
| r3 min. |
0,3 mm |
| r4 min. |
0,3 mm |
| D1 |
54.15 mm |
| D2 |
56,5 mm |
| da min. |
43.2 mm |
| Da max. |
58.8 mm |
| db min |
42 mm |
| ra max. |
0.6 mm |
| rb max. |
0.3 mm |
| dh |
48 mm |
| Db max |
60 mm |
| Weight |
0,1 Kg |
| Basic dynamic load rating (C) |
9,23 kN |
| Basic static load rating (C0) |
5,85 kN |
| (Grease) Lubrication Speed |
28 000 r/min |
| (Oil) Lubrication Speed |
44 000 r/min |
| Fatigue load limit (Pu) |
0,245 |
| Category |
Precision Ball Bearings |
| Inventory |
0.0 |
| Minimum Buy Quantity |
N/A |
| Weight / Kilogram |
0.126 |
| 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 Inner Ring and Outer Ring |
| Cage Material |
Phenolic |
| Rolling Element |
Ball Bearing |
| Flush Ground |
No |
| Inch - Metric |
Metric |
| Other Features |
Single Row | Angular Contact | High Precision | High Speed |
| Long Description |
40MM Bore; 62MM Outside Diameter; 12MM Width; Open Enclosure; ABEC 7 | ISO P4 Precision; Steel Ball Material; 1 (Single) Bearings; 25 Degree Contact Angle; Phenolic Cage Material; 1 Rib Inner Ring and |
| UNSPSC |
31171531 |
| Harmonized Tariff Code |
8482.10.50.28 |
| Noun |
Bearing |
| Keyword String |
Angular Contact Ball |
| Manufacturer Item Number |
71908 ACE/P4A |
| Weight / LBS |
0.278 |
| Outside Diameter |
2.441 Inch | 62 Millimeter |
| Bore |
1.575 Inch | 40 Millimeter |
| Width |
0.472 Inch | 12 Millimeter |
| r1,2 min. |
0.6 mm |
| r3,4 min. |
0.3 mm |
| a |
18.6 mm |
| db min. |
42 mm |
| Db max. |
60 mm |
| dn |
48 mm |
| Basic dynamic load rating C |
9.23 kN |
| Basic static load rating C0 |
5.85 kN |
| Fatigue load limit Pu |
0.245 kN |
| Attainable speed for grease lubrication |
28000 r/min |
| Attainable speed for oil-air lubrication |
44000 r/min |
| Ball diameter Dw |
6.35 mm |
| Number of balls z |
19 |
| Reference grease quantity Gref |
1.4 cm³ |
| Preload class A GA |
84 N |
| Static axial stiffness, preload class A |
78 N/µm |
| Preload class B GB |
250 N |
| Static axial stiffness, preload class B |
117 N/µm |
| Preload class C GC |
505 N |
| Static axial stiffness, preload class C |
153 N/µm |
| Calculation factor f |
1.05 |
| Calculation factor f1 |
0.99 |
| Calculation factor f2A |
1 |
| Calculation factor f2B |
1.04 |
| Calculation factor f2C |
1.07 |
| 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 |
0.1 kg |