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Machine Screw Actuator (Metric)
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Duff-Norton Metric Actuators are manufactured to the same high quality standards
and include all of the same features and benefits as the standard line of actuators
while incorporating the following features:
- Load Capacities in Tonnes
- Mounting Dimensions in millimeters
- Metric screw diameters with trapezoidal threads (machine screw actuators)
- Metric shaft and keyway sizes per ISO recommended standards
- All metric fasteners on machine screw units
- Metric bolt centers
- Other sizes and models available, contact Duff-Norton for more information
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Machine Screw Actuator Performance Specifications (Metric)
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Performance Table Instructions
When reviewing any Duff-Norton Actuator Performance Specifications 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(s) - 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. |
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Capacity (kN)
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5
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10
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25
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50
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100
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150
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200
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Lifting Screw
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Diameter (mm)
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16
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20
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30
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38
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52
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58
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65
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Lead (mm)
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3
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5
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6
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9
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12
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12
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12
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Type
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Metric Trapezoidal
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Metric Trapezoidal
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Metric Trapezoidal
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Metric Trapezoidal
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Metric Trapezoidal
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Metric Trapezoidal
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Metric Trapezoidal
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Worm Gear Ratios
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Std.
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5:1
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5:1
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6:1
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6:1
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8:1
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8:1
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8:1
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Optional No. 1
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-
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20:1
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24:1
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24:1
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24:1
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24:1
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24:1
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Optional No. 2
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-
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-
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12:1
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12:1
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-
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-
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-
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Travel per Worm Turn (mm)
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Std.
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0.60
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1.00
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1.00
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1.50
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1.50
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1.50
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1.50
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Optional No. 1
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-
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0.25
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0.25
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0.38
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0.50
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0.50
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0.50
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Optional No. 2
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-
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-
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0.50
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0.75
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-
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-
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-
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Worm Torque at No Load (N-m)
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Std.
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0.23
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0.56
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0.56
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1.13
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2.26
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2.26
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3.39
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Optional No. 1
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-
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0.56
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0.56
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1.13
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2.26
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2.26
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3.39
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Optional No. 2
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-
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-
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0.56
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1.13
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-
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-
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-
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Maximum Input Power (kW)
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Std.
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0.25
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0.37
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1.49
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2.98
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3.73
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3.73
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3.73
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Optional No. 1
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-
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0.19
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0.37
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0.56
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1.12
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1.12
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1.12
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Optional No. 2
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-
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-
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0.56
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1.49
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-
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-
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-
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Worm Torque at Full Load (N-m)
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Std.
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2.83
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7.53
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21.15
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56.78
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117.09
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189.17
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275.44
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Optional No. 1
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-
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3.69
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9.81
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27.06
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63.17
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101.40
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147.70
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Optional No. 2
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-
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-
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13.46
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36.65
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-
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-
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-
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Efficiency Rating (%)
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Std.
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16.9
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21.1
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18.8
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21.0
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20.4
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18.9
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17.3
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Optional No. 1
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-
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10.8
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10.1
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11.0
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12.6
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11.8
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10.8
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Optional No. 2
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-
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-
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14.8
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16.3
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-
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-
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-
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Weight with 25mm Stroke (kg)
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1.04
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2.27
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7.71
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15.88
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23.59
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29.94
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42.18
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Wt per Additional 25mm Stroke
(kg)
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0.04
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0.13
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0.13
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0.40
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0.63
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0.67
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1.16
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Key Torque (N-m)
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8.48
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22.80
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80.72
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213.37
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579.94
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943.98
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1374.01
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Max Worm Speed at Full Load (rpm)
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Std.
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844
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469
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673
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501
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304
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188
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129
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Optional No. 1
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-
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491
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360
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198
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169
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105
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72
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Optional No. 2
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-
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-
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397
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388
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-
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-
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-
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Max Load at Max Power and 1750
rpm (kN)
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Std.
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2.18
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2.09
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9.19
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13.59
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15.76
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14.52
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12.47
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Optional No. 1
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-
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1.52
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3.94
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3.71
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6.32
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5.83
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3.77
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Optional No. 2
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-
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-
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4.84
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9.85
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-
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-
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-
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*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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All actuator models can be supplied with standard raises
up to 24 inches. Special raises up to 20 feet are available upon request. Standard
inverted keyed models do not have a cover pipe (except for the 1-ton and 75-ton
models). Closed heights dimensions may increase for actuators supplied with bellows
boots. |