A safety nut is specially applied in such cases where the rupture of the screw may be of danger for people. Safety nut may also be used in other devices to protect against damage of machinery and outages.

Wear
After a maximum of 25% of the thread is worn out, the support nut (R) or the gear (S) needs to be replaced.

Monitoring
It is necessary to perform periodic checks and to record the wear or the thread alignment (according to the time in operation). This enables to plan the replacement soon enough to avoid the outage of the equipment.

Electronic monitoring
Electronic monitoring will signal when the approximate level of 25% wear is reached and this could be immediately displayed at the central location. Wear parts replacement may be organised in a timely manner.

Nominal speed: 1500 rpm
max. drive shaft speed: 3000 rpm
Screw size standard: 18x4
Housing material: Aluminium, corrosion-resistant
Worm shaft: steel, case-hardened, ground
Weight of screw jack body: 1.2 kg
Weight of screw/m: 1.58 kg
Gearbox lubrication: synthetic fluid grease
Screw lubrication: grease lubrication
Gearbox operating temperature: max. 60°, higher on request
Moment of inertia: N: 0,132 kg cm² / L: 0,091 kg cm²
Screw: Rotating (R)

Parameter Name	Parameter Value
Type	trapezoidal screw
Other characteristics	safety nut worm gear aluminum
Torque (Nm)	2 - 95