SJC Worm Gear Screw Jacks

Model

SJC2.5

SJC5

SJC10

SJC20

SJC50

SJC80

SJC100

SJC200

SJC300

SJC450

SJC700

SJC1000

Max. Lifting Load ( KN )

2.5

5

10

20

50

80

100

200

300

450

700

1000

Screw Diameter ( mm )

14

18

20

30

40

50

60

80

100

120

140

160

Thread Pitch ( mm )

4

4

4

6

7

8

9

12

16

16

20

20

Gear Ratio

H

1/4

1/4

1/4

1/6

1/7

1/8

1/9

1/8.75

1/10.25

1/10.75

1/13.33

1/13.33

L

1/16

1/16

1/16

1/24

1/28

1/32

1/32

1/35

1/41

1/43

1/40

1/40

Travel length(mm) per full turn of worm Shaft

H

1

1

1

1

1

1

1.125

1.371

1.56

1.49

1.5

1.5

L

0.25

0.25

0.25

0.25

0.25

0.25

0.281

0.343

0.39

0.37

0.5

0.5

Starting Efficiency %

H

24

24

25

25

18

17

18

17

18

16

16

15

L

16

16

16

19

11

10

11

11

12

10

11

10

Working Efficiency % at 1500rpm

H

34

34

35

33

32

31

33

33

33

30

31

29

L

25

25

25

24

23

22

23

22

23

20

21

19

Max. Permissible power ( KW )

H

0.25

0.30

0.57

1.14

2.2

2.5

3.0

4

7

11.5

18.5

22

L

0.12

0.15

0.27

0.55

1.1

1.5

2.2

3.5

5.5

5.5

7.5

9.5

Starting torque at full load ( N.m )

H

3.2

4.2

8

18

48.5

75

100

265

460

675

1050

1620

L

1.5

1.5

3.1

6.7

20

30

41

106

180

275

510

820

No-load Torque ( N.m )

H

0.068

0.11

0.29

0.40

0.84

1.85

2.1

2.8

3.8

5.5

8.5

11

L

0.05

0.09

0.18

0.29

0.59

1.12

1.4

2.1

3.1

4.5

5.5

7.5

Jack Housing Materials

Aluminum

Aluminum alloy/Nodular cast iron

Nodular cast iron

Weight without stroke ( kg )

1.2

3.2

5

8.5

21.5

36

58

75

110

200

400

800

Weight of screw ( kg ), per 100mm stroke

0.2

0.36

0.50

0.75

1.52

2.44

3.02

4.5

6.8

9.0

12.5

16.5

Remarks: 1: Efficiency is under grease lubrication  2: H: High speed gear ratio  L: Low Speed Gear Ratio