Guide tube: Stainless steel, European Standard
No. 1.4301 (American Standard Series 304), DIN 2391
Spindle: Stainless steel.
Thrust ball bearings: Stainless steel
End cap: Plastic

GN 391-NI drive / transfer units are normally used in conjunction with linear actuators (GN 291, GN 292 and GN 293). They are designed to translate the rotary movement for operating the linear actuators to another point or position. (See GN 298 for examples of use.)
The transfer unit in the standard length l1 is a special design; it is designed to turn the operating axis for the linear actuators (handwheel) by 90° together with an angular gear drive.
As in linear actuators, digital position indicators can be fitted.
See also:
GN 298 housings
GN 297 bevel-gear wheels
GN 295 installation kits
EN 953 and EN 954 position indicators.