Screw Jack

Materials

	Material	Normative	Specification	Indications
Worm	16NiCr4	EN 10084:2008	Casehardening alloy steel	Casehardened and ground on teeth and holds
Worn wheel	CuAl10Fe2-GM	EN 1982:2008	Alluminium bronze	Chill molded
Threaded spindle	C45	EN 10083-2:2006	Carbon steel	Tr 30x6 (ISO 2901:2016) - Rolled or machined
Carter	GJL 250	EN 1561:2011	Grey cast iron	Completely machined on 6 faces
Lubricant	Unimec Mark CA		Calcium based grease	0,3 kg

Operating temperature [°C]	-10 °C / 80 °C
Static load (traction or compression)	40 kN
Dynamic load (traction or compression)	25 kN
Maximum input speed	1800 rpm
Main gearbox weight	10 kg
Trapezoidal screw weight	5 kg/m
Anti-rotation torque at maximum load	63 Nm
Maximum admissible static lateral loads	0 N
Center-to-center diameter	50 mm
Maximum radial load on worm	450 N
Standard working conditions	25 °C - servizio 10%

	Nominal ratios
	1/5	1/10	1/30
Real ratio	1/4,75	1/9,67	1/30
Translation per worm revolution	1,26 mm	0,62 mm	0,2 mm
Efficiency	30 %	26 %	18 %
Start-up efficiency	21 %	18 %	13 %
Maximum linear speed	2160	1080	360
Torque at maximum load	16 Nm	9,3 Nm	4,4 Nm
Worm screw maximum torque	69 Nm	154 Nm	183 Nm
Idle torque	0,4 Nm	0,3 Nm	0,25 Nm