Worm Screw Jack

SWL series worm screw elevator, screw jack, lift, lifts. jacks, elevators
1. Type 1 = Screw jack with translating screw
   Type 2 = Screw jack with travelling nut
2. Size = 2.5, 5, 10, 15, 20, 25, 35 (×10KN)
3. M = Low worm gear ratio with single start lifting screw
   P = High worm gear ratio with single start lifting screw
4. Direction of lifting screw
   A = Upright
   B = Inverted
5. Lifting screw end execution
   I = Column end
   II = Top flange
   III = Threaded end
   IV = Clevis end
6. Stroke
   = mm
7. Bellows
   1. PVC bellow
   2. Other bellows, specify in order
8. Options
   F = Locked against rotation
Example
SWL    2.5   -   M   -   1   -   A     -   II   -   250   -   F
Type   Size   Ratio   Type   Direction   End execution   Stroke
Detailed Product Description

Model	SWL2.5	SWL5	SWL10	SWL15	SWL20	SWL25	SWL35
Max Capacity (KN)	25	20	100	150	200	250	350
Lifting screw	Tr30*6	Tr40*7	Tr58*12	Tr58*12	Tr65*12	Tr90*16	Tr100*20
Ratio (P)	6:1	8:1	23:3	23:3	8:1	32:3	32:3
Ratio (M)	24:1	24:1	24:1	24:1	24:1	32:1	32:1
Raise per revolution (mm) (P)	1.0	0.875	1.565	1.565	1.56	1.5	1.875
Raise per revolution (mm) (M)	0.250	0.292	0.5	0.5	0.5	0.5	0.625
Start torque on lifting screw at max load	250	385	500	400	490	850	820
	400	770	1000	800	980	1700	1640
Starting torque/Handwind torque at max load (Nm) (P)	18	39.5	119	179	240	368	464
Starting torque/Handwind torque at max load (Nm)(M)	8.86	19.8	60	90	122	217	253
Running efficiency (%)(P)	33	23	20.5	20.5	19.5	16	18
Running efficiency (%) (M)	11	11.5	13	13	12.8	9	11
Weight without spindle or protection tube (Kg)	7.3	16.2	25	25	36	70.5	87
Weight of lifting screw 100 mm (kg)	0.45	0.82	1.67	1.67	2.15	4.15	5.20
Lubrication	ZGN-1 or ZGN-2 (-20-+100)
Grease quantity	0.1	0.3	0.5	0.5	0.75	1.1	1.9

*) The holding torque is the torque on the input shaft which is required to prevent the load from being lowered.
SWL series worm screw elevator, screw jack, lift.