Stieber Built In Freewheels NF
A roller-type built-in freewheel without integrated bearing support
Type NF is a roller-type built-in freewheel without integrated bearing support. Bearings are required to support both axial and radial loads, and lubrication and sealing must be provided by the installation. Standard lubrication is oil, and the nominal outside diameter corresponds to a standard ball bearing dimension. A typical arrangement is to install this freewheel alongside a bearing with matching housing tolerances. The inner race is keyed to the shaft and the outer race has a positive n6 tolerance to give a press fit in an H7 housing. Additional side notches provide positive torque transmission. If the housing tolerance is K6, the notches are not necessary, but the housing must be strong enough not to expand after assembly.
| dH7 | Dn6 | D5 | D6 | L | t | bH11 | r | r1 | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|
| 8 | 37 | 30 | 20 | 20 | 3 | 6 | 1.0 | 1.5 | 0.1 |
| 12 | 37 | 30 | 20 | 20 | 3 | 6 | 1.0 | 1.5 | 0.1 |
| 15 | 47 | 37 | 26 | 30 | 3.5 | 7 | 1.5 | 1.5 | 0.3 |
| 20 | 62 | 52 | 37 | 36 | 3.5 | 8 | 2.0 | 2.0 | 0.6 |
| 25 | 80 | 68 | 49 | 40 | 4 | 9 | 2.0 | 2.0 | 1.1 |
| 30 | 90 | 75 | 52.5 | 48 | 5 | 12 | 2.0 | 2.0 | 1.6 |
| 35 | 100 | 80 | 58 | 53 | 6 | 13 | 2.5 | 2.5 | 2.3 |
| 40 | 110 | 90 | 62 | 63 | 7 | 15 | 2.5 | 2.5 | 3.1 |
| 45 | 120 | 95 | 69 | 63 | 7 | 16 | 2.5 | 2.5 | 3.7 |
| 50 | 130 | 110 | 82 | 80 | 8.5 | 17 | 3.0 | 3.0 | 5.4 |
| 55 | 140 | 115 | 83 | 80 | 9 | 18 | 3.0 | 3.0 | 6.1 |
| 60 | 150 | 125 | 93.5 | 95 | 9 | 18 | 3.5 | 3.5 | 8.5 |
| 70 | 170 | 140 | 106 | 110 | 9 | 20 | 3.5 | 3.5 | 13 |
| 80 | 190 | 160 | 122 | 125 | 9 | 20 | 3.5 | 3.5 | 18 |
| 90 | 215 | 180 | 133 | 140 | 11.5 | 24 | 4.0 | 4.0 | 25.3 |
| 100 | 260 | 210 | 157 | 150 | 14.5 | 28 | 4.0 | 4.0 | 42.1 |
| 130 | 300 | 240 | 188 | 180 | 17 | 32 | 5.0 | 5.0 | 65 |
| 150 | 320 | 124 | 53 | 180 | 17 | 32 | 5.0 | 5.0 | 95 |
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