71960 CDMA/P4A
These super-precision, high-capacity, single row angular contact ball bearings, with 15° contact angle, accommodate radial and axial loads acting simultaneously, where the axial load acts in one direction only. They are designed to accommodate heavy loads at relatively high speeds under low to moderate operating temperatures.
Very high running accuracy
Very high load carrying capacity
Relatively high speed and stiffness
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Product Introduction
| Universal matching bearing(s) |
No |
Dimensions
| d |
300 mm |
Bore diameter |
|---|---|---|
| D |
420 mm |
Outside diameter |
| B |
56 mm |
Width |
| d1 |
337 mm |
Shoulder diameter of inner ring (large side face) |
| d2 |
337 mm |
Shoulder diameter of inner ring (small side face) |
| D1 |
383 mm |
Shoulder diameter of outer ring (large side face) |
| r1,2 |
min.3 mm |
Chamfer dimension |
| r3,4 |
min.1.1 mm |
Chamfer dimension |
| a |
76.4 mm |
Distance from side face to pressure point |
Abutment dimensions
| da |
min.313 mm |
Diameter of shaft abutment |
|---|---|---|
| db |
min.313 mm |
Diameter of shaft abutment |
| Da |
max.407 mm |
Diameter of housing abutment |
| Db |
max.414 mm |
Diameter of housing abutment |
| ra |
max.2.5 mm |
Radius of fillet |
| rb |
max.1 mm |
Radius of fillet |
| dn |
347 mm |
Position of oil nozzle |
Calculation data
| Basic dynamic load rating | C |
371 kN |
|---|---|---|
| Basic static load rating | C0 |
600 kN |
| Fatigue load limit | Pu |
13.4 kN |
| Attainable speed for grease lubrication |
2 800 r/min |
|
| Attainable speed for oil-air lubrication |
4 300 r/min |
|
| Contact angle | α |
15 ° |
| Ball diameter | Dw |
38.1 mm |
| Number of rows | i |
1 |
| Number of balls (per bearing) | z |
26 |
| Reference grease quantity (per bearing) | Gref |
265 cm³ |
| Preload, class A | GA |
1 400 N |
|---|---|---|
| Axial stiffnes for preload A (sets of two brgs back to back or face to face) |
272 N/µm |
|
| Preload, class B | GB |
2 800 N |
| Axial stiffness for preload B (sets of two brgs back-to-back or face-to-face) |
369 N/µm |
|
| Preload, class C | GC |
5 600 N |
| Axial stiffness for preload C (sets of two brgs back-to-back or face-to-face) |
514 N/µm |
|
| Preload, class D | GD |
11 200 N |
| Axial stiffness for preload D (sets of two brgs back-to-back or face-to-face) |
741 N/µm |
| Correction factor dependent on bearing series and size | f |
1.22 |
|---|---|---|
| Correction factor dependent on contact angle | f1 |
1 |
| Correction factor, preload class A | f2A |
1 |
| Correction factor, preload class B | f2B |
1.04 |
| Correction factor, preload class C | f2C |
1.09 |
| Correction factor, preload class D | f2D |
1.15 |
| Correction factor for hybrid bearings | fHC |
1 |
| Calculation factor for equivalent loads | f0 |
16.3 |
|---|---|---|
| Additional factors for equivalent loads |
Refer to Notes 1 and 2 below |
| NO. | d[mm] | D[mm] | B[mm] |
| 71972 CDMA/P4A | 360 | 480 | 56 |
| 71972 ACDMA/P4A | 360 | 480 | 56 |
| 71968 CDMA/P4A | 340 | 460 | 56 |
| 71960 CDMA/P4A | 300 | 420 | 56 |
| 71960 ACDMA/P4A | 300 | 420 | 56 |
| 7052 ACD/P4ADGB | 260 | 400 | 130 |
| 7052 ACD/P4A | 260 | 400 | 65 |
| 71956 CDGA/P4A | 280 | 380 | 46 |
| 71956 CD/P4ATBTA | 280 | 380 | 138 |
| 71956 CD/P4A | 280 | 380 | 46 |
| 71956 CD/HCP4A | 280 | 380 | 46 |
| 71956 ACDGA/P4A | 280 | 380 | 46 |
| 71956 ACD/P4ATGB | 280 | 380 | 138 |
| 71956 ACD/P4ATBTB | 280 | 380 | 138 |
| 71956 ACD/P4ADGA | 280 | 380 | 92 |
| 71956 ACD/P4A | 280 | 380 | 46 |
| 71956 ACD/HCP4ADGA | 280 | 380 | 92 |
| 71952 CDGA/P4A | 260 | 360 | 46 |
| 71952 CD/P4ADBB | 260 | 360 | 92 |
| 71952 CD/P4ADBA | 260 | 360 | 92 |
| 71952 CD/P4A | 260 | 360 | 46 |
| 71952 ACDGB/P4A | 260 | 360 | 46 |
| 71952 ACDGA/P4AL | 260 | 360 | 46 |
| 71952 ACDGA/P4A | 260 | 360 | 46 |
| 71952 ACD/P4ATBTB | 260 | 360 | 138 |
| 71952 ACD/P4AQBCA | 260 | 360 | 184 |
| 71952 ACD/P4ADGA | 260 | 360 | 92 |
| 71952 ACD/P4ADBC | 260 | 360 | 92 |
| 71952 ACD/P4ADBB | 260 | 360 | 92 |
| 71952 ACD/P4ADBA | 260 | 360 | 92 |
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