Needle Roller Bearing
The correct form and dimenssional accuracy of outer ring of drawn cup needle roller bearing is achieved only by press fitting into proper housing with appropriate interference.Thereofre,roller insribed circle diameter is measured after press fitted into a standard ring gauge.
The tolerance zone class of stud diameter d of cam followers is h7,and the tolerance of assembled width of inner ring of roller followers is shown in bearing table.
These tolerance are applied to the bearings before surface treatment.
| Bearing Designation and Mass Approx | Boundary Dimensions | Basic Load Rating | Limiting Speed | ||||||||
Shaft Diameter | Open | Mass | Closed | Mass | FW | D | C | Cr Dynamic | Cor Static | Oil | ||
mm | Current | Original Code | g | Current | Original Code | g | mm | N | rpm | |||
4 | HK0408TN | 37941/4 | 1.6 | BK0408TN | 35941/4 | 1.8 | 4 | 8 | 8 | 1540 | 1070 | 40000 |
5 | HK0509 | 47941/5 | 2 | BK0509 | 45941/5 | 2.1 | 5 | 9 | 9 | 2200 | 1790 | 36000 |
7 | HK0709 | 47941/7 | 2.3 | BK0709 | 45941/7 | 2.9 | 7 | 11 | 9 | 2800 | 2150 | 27000 |
13 | HK1312 | - | 8.9 | BK1312 | - | 11.2 | 13 | 19 | 12 | 6200 | 7100 | 17000 |
45 | HK4512 | 27941/45 | 34.8 | BK4512 | 25941/45 | 45 | 45 | 52 | 12 | 12900 | 22500 | 5800 |
HK4516 | 47941/45 | 46.2 | BK4516 | 45941/45 | 56 | 45 | 52 | 16 | 19300 | 38000 | 5800 | |
HK4520 | 67941/45 | 56 | BK4520 | 65941/45 | 72 | 45 | 52 | 20 | 22000 | 51000 | 5800 | |
55 | HK5520 | 57941/55 | 78 | BK5020 | - | 93.8 | 55 | 63 | 20 | 29500 | 59900 | 4600 |
HK5525 | 77941/55 | 109 | - | 55941/55 | - | 55 | 63 | 25 | 33500 | 69980 | 4600 | |
HK5528 | 87941/55 | 111 | BK5528 | 84941/60 | 132 | 55 | 63 | 28 | 39090 | 98000 | 4600 | |
60 | HK6012 | - | 49.2 | BK6012 | - | 77 | 60 | 68 | 12 | 12400 | 29000 | 4100 |
HK6020 | 57941/60 | 86 | BK6020 | 55941/60 | 105 | 60 | 68 | 20 | 30500 | 72000 | 4100 |
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needle bearing