Flanged single nut with integrated safety nut for peeled ballscrew spindles.

The safety nut SEM consists of a ballscrew unit and a safety unit. The safety nut basically works just like a normal ballscrew nut. If the axial play increases due to wear, ball breakage, or ball loss, the thread of the safety unit comes into contact with the ballscrew. This means the nut can't be penetrated. The normal function of the unit is guaranteed up to an axial play of 0.4 mm. The function is monitored by measuring the axial play or motor current.

Table dimensions of the safety nut

• The use of a safety nut alone is not a sufficient protection against unintentional lowering of a load. The valid for the application security guidelines must be followed. Additional measures, such as the monitoring of the motor current and the monitoring of the drive train are provided