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, lowerspeeds, 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 |
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|---|---|---|---|---|---|---|---|---|---|---|---|
|
Capacity (tons) - 17-4PH Worn |
2 |
5 |
10 |
15 |
20 |
25 |
30 |
35 |
50 |
100 |
|
|
Capacity (tons) - 316 SSWorn |
0.67 |
1.66 |
3.33 |
5.00 |
6.66 |
8.33 |
9.9 |
11.66 |
16.66 |
33.33 |
|
|
Lifting Screw |
Diameter (in) |
1 |
1-1/2 |
2 |
1-1/4 |
2-1/2 |
3 |
3 |
3-3/4 |
4-1/2 |
6 |
|
Pitch (Std. & Opt.) |
0.250 |
0.375 |
0.500 |
0.500 |
0.500 |
0.666 |
0.666 |
0.666 |
0.666 |
0.750 |
|
|
Pitch (Numerical) |
— |
0.250 |
0.250 |
0.250 |
0.250 |
0.320 |
0.320 |
0.320 |
0.320 |
— |
|
|
Type |
ACME |
ACME |
ACME |
ACME |
ACME |
ACME |
ACME |
ACME |
Mod. Sq. |
Mod. Sq. |
|
|
Worm Gear Ratios |
Standard |
6:1 |
6:1 |
8:1 |
8:1 |
8:1 |
10-2/3:1 |
10-2/3:1 |
10-2/3:1 |
10-2/3:1 |
12:1 |
|
Optional No. 1 |
24:1 |
24:1 |
24:1 |
24:1 |
24:1 |
32:1 |
32:1 |
32:1 |
32:1 |
36:1 |
|
|
Optional No. 2 |
12:1 |
12:1 |
— |
— |
— |
— |
— |
— |
— |
— |
|
|
Numeric Ratio |
25:1 |
25:1 |
25:1 |
25:1 |
25:1 |
32:1 |
32:1 |
32:1 |
32:1 |
— |
|
|
Turns of Worm for 1 inch Stroke |
Standard |
24 |
16 |
16 |
16 |
16 |
16 |
16 |
16 |
16 |
16 |
|
Optional No. 1 |
100 |
67 |
50 |
50 |
50 |
48 |
48 |
48 |
48 |
48 |
|
|
Optional No. 2 |
50 |
33 |
— |
— |
— |
— |
— |
— |
— |
— |
|
|
Numeric Ratio |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
|
|
Worm Torque at No Load (in-lb) |
Standard |
5 |
10 |
20 |
20 |
30 |
40 |
40 |
50 |
100 |
200 |
|
Optional No. 1 |
5 |
10 |
20 |
20 |
30 |
40 |
40 |
50 |
100 |
200 |
|
|
Optional No. 2 |
5 |
10 |
— |
— |
— |
— |
— |
— |
— |
— |
|
|
Numeric Ratio |
5 |
10 |
20 |
20 |
30 |
40 |
40 |
50 |
100 |
200 |
|
|
Maximum Horsepower per Actuator |
Standard |
2 |
4 |
5 |
5 |
5 |
8 |
8 |
8 |
15 |
25 |
|
Optional No. 1 |
1/2 |
3/4 |
1-1/2 |
1-1/2 |
1-1/2 |
1-1/2 |
1-1/2 |
1-1/2 |
6 |
11 |
|
|
Optional No. 2 |
3/4 |
2 |
— |
— |
— |
— |
— |
— |
— |
— |
|
|
Numeric Ratio |
1/2 |
3/4 |
1-1/2 |
1-1/2 |
1-1/2 |
1-1/2 |
1-1/2 |
1-1/2 |
6 |
11 |
|
|
Worm Torque at Full Load* (in-lb) 17-4PH Worm |
Standard |
120 |
450 |
750 |
1430 |
2050 |
2700 |
2640 |
4000 |
7500 |
16000 |
|
Optional No. 1 |
50 |
185 |
400 |
820 |
1170 |
1700 |
1685 |
2400 |
4200 |
8600 |
|
|
Optional No. 2 |
75 |
275 |
— |
— |
— |
— |
— |
— |
— |
— |
|
|
Numeric Ratio |
48 |
175 |
370 |
640 |
925 |
1500 |
1800 |
2411 |
4040 |
— |
|
|
Worm Torque at Full Load* (in-lb) 316SS Worm |
Standard |
42 |
150 |
253 |
471 |
675 |
926 |
940 |
1366 |
2566 |
5466 |
|
Optional No. 1 |
19 |
66 |
141 |
276 |
394 |
593 |
600 |
833 |
1466 |
3000 |
|
|
Optional No. 2 |
27 |
95 |
— |
— |
— |
— |
— |
— |
— |
— |
|
|
Numeric Ratio |
25 |
57 |
67 |
109 |
144 |
336 |
635 |
350 |
619 |
— |
|
|
Efficiency Rating (%) - 17-4PH Worm |
Standard |
22.1 |
22.1 |
26.5 |
20.9 |
22.0 |
22.4 |
22.4 |
17.4 |
13.3 |
12.4 |
|
Optional No. 1 |
13.3 |
9.1 |
16.6 |
12.1 |
12.8 |
11.8 |
11.8 |
9.7 |
7.9 |
7.7 |
|
|
Optional No. 2 |
17.7 |
18.1 |
— |
— |
— |
— |
— |
— |
— |
— |
|
|
Numeric Ratio |
13.3 |
9.1 |
8.6 |
7.5 |
6.9 |
5.3 |
5.3 |
4.6 |
3.9 |
— |
|
|
Efficiency Rating (%) - 316SS Worm |
Standard |
20.3 |
21.1 |
25.1 |
20.3 |
18.8 |
17.9 |
17.9 |
17.0 |
12.9 |
12.1 |
|
Optional No. 1 |
10.9 |
12.0 |
15.0 |
11.5 |
10.7 |
9.3 |
9.3 |
9.3 |
7.5 |
7.4 |
|
|
Optional No. 2 |
15.5 |
16.8 |
— |
— |
— |
— |
— |
— |
— |
— |
|
|
Numeric Ratio |
10.9 |
8.0 |
7.5 |
5.8 |
5.4 |
4.5 |
5.0 |
4.5 |
3.6 |
— |
|
|
Key Torque (in-lb) - 17-4PH Worm |
Std. & Opt. |
460 |
1750 |
4700 |
7580 |
10625 |
14000 |
16800 |
26500 |
47110 |
118200 |
|
Numeric Ratio |
460 |
1599 |
4077 |
6645 |
9369 |
11474 |
13770 |
18561 |
30970 |
— |
|
|
Key Torque (in-lb) - 316SS Worm |
Std. & Opt. |
153 |
581 |
1565 |
2527 |
3538 |
4665 |
5600 |
8828 |
15697 |
39396 |
|
Numeric Ratio |
211 |
460 |
551 |
959 |
1199 |
2328 |
2800 |
2358 |
4087 |
— |
|
|
Weight with 6 inch Stroke (Raise) (lb) |
17 |
35 |
52 |
66 |
93 |
160 |
160 |
240 |
410 |
1200 |
|
|
Weight per additional 1 inch Stroke (Raise) (lb) |
0.3 |
0.9 |
1.4 |
1.5 |
2.6 |
2.5 |
2.5 |
3.7 |
5.5 |
9.0 |
|
|
Note: For loads from 25% to 100% of actuator capacity, torque requirements are approximately proportional to the load. Contact Duff-Norton Customer Service for motorized performance. |
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Stainless Steel Actuator Cut-Away Diagram |
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2 to 100 Ton Capacity
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APAC - English - EN
