SFZ Locknuts

NRS 15x2 TO NRS 80x24

Conventional locknuts may not be suitable in a typical roller screw application due to the high axial load generated. Nook series SFZ locknuts are designed to carry high axial forces while minimizing the rotational inertia, an important benefit in high dynamic applications. SFZ locknuts are designed to carry high axial load, have high loosening torque and are manufactured with high accuracy to optimize the load on the thread interface. (See Image 2 in Figure 1 Below) for SFZ Locknut on an EZRF bearing mount.

(See Image 3 in Figure 1 Below) for product diagram.

Dimensions in mm Locking Screws
Max Tightening Torque (T) Allowable Axial Load (Ca) Loosening Torque (T)
Part No. Size x Pitch Roller Screw D h g t d1 d2 L DIN (N·m) kN (N·m)
SFZ 12x1 NRS 15 30 14 4 2 25 13 27 M5 4.7 40 18
SFZ 15x1 NRS 20 33 16 4 2 28 16 30 M5 4.7 60 20
SFZ 17x1 NRS 21 37 418 5 2 33 18 34 M6 8 80 25
SFZ 20x1 NRS 25 40 18 5 2 35 21 36 M6 8 90 35
SFZ 25x1.5 NRS 27 44 20 5 2 39 26 41 M6 8 130 45
SFZ 35x1.5 NRS 39 54 22 5 2 49 38 50 M6 8 190 65
SFZ 40x1.5 NRS 44 65 22 6 2.5 59 42 60 M8 18.6 210 80
SFZ 45x1.5 NRS 48 70 22 6 2.5 64 48 65 M8 18.6 240 95
SFZ 55x2 NRS 60 85 25 7 3 78 58 80 M8 18.6 340 225
SFZ 60x2 NRS 64 90 26 8 3.5 82 62 85 M8 18.6 380 245
SFZ 70x2 NRS 75 100 28 8 3.5 92 72 95 M8 18.6 490 285
SFZ 75x2 NRS 80 105 28 8 3.5 97 77 100 M8 18.6 520 305
Figure 1