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Continuous Duty Actuators (Imperial) |
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Duff-Norton Continuous Duty Cycle actuators are specifically
designed for continuous operation. The gear set operates in an oil bath for
thermal efficiency and long life. The shell is made of a finned aluminum for
better cooling properties. Additionally, the Duff-Norton ball screw system
increases these models efficiency.
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Continuous operation (at rated capacities only)
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Increased predictable life
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High mechanical and thermal efficiency
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Oil lubricated
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Continuous Duty Actuator Performance Specifications (Imperial) |
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Model No. |
7511 |
75151 (HL) |
7515 |
75221 (HL) |
7522 |
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Max. Speed Cface Driven (in/min)** (pg. 114) |
118.5 |
215.5 |
102.0 |
161.5 |
81.0 |
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Max. Speed Red. Driven (in/min)** (pg. 110) |
14.4 |
43 |
20.4 |
57.4 |
27.2 |
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Max. Load Capacity (lbs.) |
3,500 |
5,500 |
12,000 |
13,500 |
27,000 |
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Rated Load Capacity (lbs. - 1000 hours life) |
2,000 |
3,200 |
5,200 |
12,000 |
13,000 |
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Lifting Screw (Dia. x Lead) |
1.17 x .413 |
1.5 x 1.00 |
1.50 x .474 |
2.25 x 1.0 |
2.25 x .500 |
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Worm Gear Ratio |
6:1 |
8:1 |
8:1 |
10 2/3:1 |
10 2/3:1 |
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Turns of Worm for 1" Raise |
14.526 |
8.000 |
16.889 |
10.667 |
21.333 |
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Horsepower per Actuator (Max. @ 1750 RPM) |
2 |
5 |
5 |
10 |
10 |
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Key Torque (in-lb) |
260 |
975 |
1000 |
2400 |
2400 |
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Starting Torque (in-lb @ Max. Load) |
75 |
200 |
200 |
420 |
420 |
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Running Torque (in-lb @ Max. Load) |
60 |
170 |
170 |
350 |
350 |
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Hold Back Torque* (lb-ft at Max. Load) |
4 |
9 |
9 |
12 |
12 |
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Actuator Efficiency Rating (Percentage) |
63.91 |
64.36 |
66.52 |
57.55 |
57.55 |
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Weight with Base Raise of 6" (lbs.) |
19 |
43 |
43 |
95 |
95 |
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Weight for Each Additional 1" Raise (lbs.) |
.4 |
.9 |
.9 |
1.5 |
1.5 |
*For loads from 25% to 100% of the actuator capacity,
torque requirements are approximately proportional to the load.
**Speed is a function of how the actuator is driven. Please see the “Motorized Performance”
verticle tab to your screen’s left. |
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Maximum Allowable Duty Cycle at 1750 RPM Input Speed
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| Model No. |
Max. Capacity |
75% Max. Capacity |
Rated Capacity |
| 7515 |
100% |
100% |
100% |
| 7515 |
33% |
67% |
100% |
| 7522 |
33% |
67% |
100% |
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