Ball nuts SFN Series

Single ball nuts with flange

All Servomech ball screws and nuts are designed and produced inside our factory in Anzola dell’Emilia (Bologna), ITALY.

BS Series ball screws:

Available on different accuracy grade (ISO IT3, IT5, IT7)
Nominal diameter d0 [mm], in accordance with standards ISO 3408 and DIN 69051:
14, 16, 20, 25, 32, 40, 50, 63, 80, 100, 120
Lead Ph [mm], in accordance with standards ISO 3408 and DIN 69051:
4, 5, 6, 8, 10, 12, 15, 16, 20,25, 32, 40
Max. thread length up to 10 m (depending on the diameters and the length of the bar)

SFN Series single ball nuts with flange:

Available with zero backlash or preloaded
Different dimensions available (DIN 69051, customer’s specs or SERVOMECH design)

Threaded shafts: alloy steel 42CrMo4 or 50CrMo4 (UNI EN 10083-1), quenched
Hardness of ball tracks within the range (58 … 61) HRc

Ball nuts: alloy steel 18 NiCrMo5 (UNI EN 10084), case-hardened
Hardness of surfaces in contact within the range (58 … 61) HRc

Ball recirculating elements: alloy steel, case-hardened, with a surface hardness (50 … 55) HRc or plastic material depending on the application requirements

Working temperature: (-20 … +110)°C
Using special materials, it is possible to achieve temperature up to 500° C

For more information, please contact SERVOMECH technical support.


On this website we use first or third-party tools that store small files (cookie) on your device. Cookies are normally used to allow the site to run properly (technical cookies), to generate navigation usage reports (statistics cookies) and to suitable advertise our services/products (profiling cookies). We can directly use technical cookies, but you have the right to choose whether or not to enable statistical and profiling cookies. Enabling these cookies, you help us to offer you a better experience.
Cookie Policy.