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IBSJ_Actuator
IBSJ_Actuator

Imperial Ball Screw Jacks

Mechanical Actuators - 1/4 to 350 Ton

IBSJ_Actuator
IBSJ_Actuator
1/2 to 50 ton capacity. Ball Screw actuators provide high efficiency and high speed in one linear positioning package. These actuators come in many standard models, or can be custom designed for any application up to 50 tons. The positive action of the low friction ball screw and nut design provides longer life at load and requires less power to achieve a specified thrust. Ball screw actuators can be used individually, in tandem or as part of a larger mechanical system. With lifts up to 20 feet, Duff-Norton Ball Screw actuators offer the perfect solution to many linear positioning applications.

Features & Benefits

FEATURES & BENEFITS
Ball Screw Actuators 1/2 ton to 50 ton

Energy Efficient

Requires less power by providing positive mechanical action.

Long Operation Life

Long predictable ball screw and ball nut life.

Multiple Configurations

Ball screw actuators can be used individually, in tandem or as part of a larger mechanical system.

Predictable Efficiency

Move loads and apply force more efficiently than other mechanical actuators.

Durable Design

Ball screw jacks reliably handle full loads in tension or compression.

Enhanced Speed

Ball screws permit faster operation and longer life under heavy loads.

Specifications

Performance Table Instructions 
When reviewing and Duff-Norton Actuator Performance Specification Table, as part of the process of selecting the best-suited actuator for your application, there are several important worm-gear ratios to consider.
Standard Ratio - is frequently chosen when higher speeds and efficiency ratings are desired.
Optional Ratio - is frequently chosen when the application requires higher lifting capacities, lower speeds, or to ease the use of a handwheel.
Numeric Ratio - is frequently chosen for applications requiring fine adjustments, higher lifting capacities, lower speeds, the easy use of a handwheel, self locking applications, and also offers the benefit of an even number of worm input turns per inch of stroke.

Performance Specifications - Machine Screw Actuator Stainless Steel

Capacity (tons)

1/2

1

2H

2

3

5 (HL)

5

10 (HL)

10

20 (HL)

20

25

50*

Max. Speed Cface Driven (in/min)

287.5

72.0

118.5

287.5

136.5

215.5

102.0

215.5

108.0

81.0

Max. Speed Red. Driven (in/min)

57.51

14.4

23.7

57.4

27.2

43

20.4

43.1

21.6

20.1

33.4

Lifting Screw

Diameter (in)

5/8

3/4

1

1

1-11/64

1-1/2

1-1/2

1-1/2

1-1/2

2-1/4

2-1/4

3

4

Lead (in)

0.200

0.200

1.000

0.250

0.413

1.000

0.474

1.000

0.474

1.000

0.500

0.660

1.000

Worm Gear Ratios

Standard

5:1

5:1

6:1

6:1

6:1

6:1

6:1

8:1

8:1

8:1

8:1

10-2/3:1

10-2/3:1

Optional No. 1

20:1

20:1

24:1

24:1

24:1

24:1

24:1

24:1

24:1

24:1

24:1

32:1

32:1

Optional No. 2

12:1

12:1

12:1

12:1

12:1

Turns of Worm for
1 inch Stroke

Standard

25

25

6

24

14.526

6

12.667

8

16.889

8

16

16.16

10.67

Optional No. 1

100

100

24

96

58.106

24

50.667

24

50.667

24

48

48.48

32

Optional No. 2

12

48

29.053

12

25.334

Worm Torque at No
Load (in-lb)

Standard

0.5

2

10

3

5

20

10

20

15

50

40

40

40

Optional No. 1

0.5

2

10

3

5

20

10

20

15

50

40

40

40

Optional No. 2

10

3

5

20

10

Maximum Horsepower
per Actuator

Standard

1/3

1/2

2

2

2

4

4

5

5

5

5

8

15

Optional No. 1

1/6

1/4

1/2

1/2

1/2

3/4

3/4

1-1/2

1-1/2

1-1/2

1-1/2

2-1/2

6

Optional No. 2

3/4

3/4

3/4

2

2

Starting Worm Torque at Full Load (in-lb)

Standard

10.5

22

180

50

110

500

200

800

350

1375

700

925

2700

Optional No. 1

5.0

11

80

25

50

206

90

400

175

625

325

475

1500

Optional No. 2

110

30

68

300

145

Running Worm Torque at Full Load (in-lb)

Standard

9.5

21

160

45

100

410

180

700

300

1270

650

825

2200

Optional No. 1

4.0

10

70

20

45

183

80

290

150

570

300

425

1200

Optional No. 2

100

25

60

270

125

Efficiency Rating (%)

Standard

67.0

60.6

66.3

58.9

65.7

64.7

69.8

56.8

62.8

62.7

61.2

59.7

67.8

Optional No. 1

39.8

31.8

37.9

33.2

36.5

36.2

39.3

45.7

41.9

46.5

44.2

38.6

41.4

Optional No. 2

53.0

53.1

54.8

49.1

50.3

Weight with 6 inch Stroke (Raise) (lb)

2.8

5

20

20

21

40

40

50

50

115

115

235

520

Weight per Additional 1 inch Stroke (Raise) (lb)

0.1

0.3

0.3

0.3

0.4

0.9

0.9

0.9

0.9

1.5

1.5

2.9

5.0

Hold Back Torque at Rated Load (ft-lb)

Standard

1

1

2

2

7

8

8

24

11

24

24

24

32

Optional No. 1

0.5

0.5

0.5

0.5

0.5

0.5

0.5

0.5

0.5

2

2

2

33

Optional No. 2

1

1

2

2

2

Key Torque (in-lb)

35

70

100

175

440

1800

850

3500

1700

7000

3500

6000

17700

Max Worm Speed at Full Load (rpm)

Standard

2001

1432

700

2521

1146

504

1146

394

900

229

450

545

350

Optional No. 1

2101

1432

394

1261

630

229

252

236

540

151

291

332

252

Optional No. 2

430

5875

695

420

869

Maximum Load at Full Horsepower and 170 rpm (lb)

Standard

1150

1601

1459

5875

3830

2585

6384

4104

9855

3927

8489

14018

17250

Optional No. 1

1223

1556

458

2729

1734

377

2126

1791

4878

280

1968

5751

8942

Optional No. 2

680

3557

2096

1858

4595

Notes:
- Hold Back Torque is restraining torque at the worm shaft to keep load from running down.
- Lifting torques are proportional to load, down to 25% of rated load.
- All actuator units can be supplied with standard raises up to 24 inches. Special raises up to 20 feet are available upon request. Closed height dimensions may increase for actuators supplied with bellows boots.
* Does your ball screw application require more than 50 tons? Please contact our Customer Service group to explore our specialty options for higher load ratings up to 100 tons.

Models

Ball Screw Actuator Cut-Away Diagram

Ball-Screw-Actuator.jpg

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