Duff-Norton Ball Screw Translating - Manual (Page 3)

3
Section I
General Information
1-1. General
This manual contains maintenance instructions
for Duff-Norton translating ball screw actuators. It
describes and details procedures for installation,
disassembly, cleaning, inspection, and assembly of
these actuators.
1-2. Applications
The actuators described and illustrated in this
manual are intended for industrial use only and
should not be used to lift, support or otherwise
transport people unless you have a written state-
ment from Duff-Norton which authorizes the specific
actuator unit, as used in your application, as suit-
able for moving people.
These actuators are intended for a clean, non-
corrosive environment with ambient temperatures
ranging from -20 to 200 ° F. If your environment is
dirty and/or contains abrasive particles it is impor-
tant to protect the screw with a boot. If your atmo-
sphere is corrosive it is important to specify a non-
corrosive material or finish. Duff-Norton can provide
stainless steel, nickel plated or epoxy coated actua-
tors. If your duty is high or your use severe, more
frequent lubrication should be employed. Duff-
Norton publishes a Mechanical Actuator Design
Guide, Catalog No. 2003, which you may find
helpful in the selection and application of mechani-
cal actuators. If you need additional help, please
contact Duff-Norton at (800) 477-5002.
1-3. Table of Specifications
Note: Hold back torque is restraining torque at the worm shaft, to keep load from running down.
*Dimensionally same as Model 2802/9802
† Dimensionally same as Model 9805
‡ Dimensionally same as Model 9810
1-4. Important Precautions
To ensure that actuators provide good service
over a period of years, the following precautions
should be taken:
1. Select an actuator that has a rated capacity
greater than the maximum load that may be
imposed on it.
2. The structure on which the actuators are
mounted should have ample strength to carry
the maximum load, and should be rigid enough
to prevent undue deflection or distortion of the
actuator supporting members.
3. It is essential that the actuators be carefully
aligned during installation so that the lifting
screws are perfectly plumb and the connecting
shafts are exactly in line with the worm shafts.
After the actuators, shafting, gear boxes, etc.,
are coupled together, it should be possible to
turn the main drive shaft by hand. If there are no
signs of binding or misalignment, the actuator
system is then ready for normal operation.
Standard Actuator Upright 28631 2802/9802 28021/98021* 28003/98003 9805 98051† 9810 98101‡ 9820 9825 2860
Model Numbers Inverted 28630 2801/9801 28011/98011 28002/98002 9804 98041 9809 98091 9819 9824 2859
Special Actuator Upright 38631 3802/9802 3802/9802 38003/108003 10805 0805 10810 10810 10820 10825 3860
Model Numbers Inverted 38630 3801/9801 3801/9801 38002/108002 10804 10804 10809 10809 10819 10824 3859
Rated Load (tons) 1/2 2 2 3 5 5 10 10 20 25 50
Diameter of 5/8 1 1 1 11/64 1 1/2 1 1/2 1 1/2 1 1/2 2 1/4 3 4
Lifting Scfew (inches) .200 Lead .250 Lead 1.000 Lead .413 Lead .474 Lead 1.000 Lead .474 Lead 1.000 Lead .500 Lead .660 Lead 1.000 Lead
Closed Height (inches) 5 7 1/2 7 1/2 9 1/4 10 3/4 10 3/4 10 3/8 10 3/8 16 1/2 19 3/4 25 3/8
Base Size (inches) 2 1/4 x 4 3 1/2 x 7 3 1/2 x 7 3 1/2 x 7 6 x 8 6 x 8 7 1/2 x 8 3/47 1/2 x 8 3/48 1/4 x 11 10 1/4 x 13 3/4 9 3/4 x 19 3/4
Std Ratio 5:1 6:1 6:1 6:1 6:1 6:1 8:1 8:1 8:1 10 2/3:1 10 2/3:1
Worm Gear Ratios Optional 20:1 12:1 24:1 12:1 24:1 24:1 24:1 24:1 24:1 32:1 32:1
Optional — 24:1 — 24:1 — — — — — — —
Std Ratio 25 24 6 14.526 12.667 6 16.888 8 16 16.16 10.66
Turns of Worm Optional 100 48 24 29.052 50.667 24 50.667 24 48 48.48 32
For 1˝ Raise Optional — 96 — 58.104 — — — — — — —
Std Ratio 1/3 2 2 2 4 4 5 5 5 8 15
Maximum H.P. Optional 1/6 3/4 1/2 3/4 3/4 3/4 1 1/2 1 1/2 1 1/2 2 1/2 6
Per Actuator Optional — 1/2 — 1/2 — — — — — — —
Starting Torque Std Ratio 10.5 50 180 110 220 500 350 800 700 925 2,700
at Full Load Optional 5.0 30 80 68 90 206 175 400 325 475 1,500
(lb-ins) Optional — 25 — 50 — — — — — — —
Running Torque Std Ratio 9.5 45 160 100 180 410 300 700 650 825 2,200
at Full Load Optional 4.5 25 70 60 80 183 150 290 300 425 1,200
(lb-ins) Optional — 20 — 45 — — — — — — —
Std Ratio 65 59 59 59 70 70 65 65 61 60 55
Actuator Efficiency Optional 38 44 33 44 39 39 42 42 44 39 33
Rating (%) Optional — 33 — 33 — — — — — — —
Weight with Base
Raise of 6˝ (lbs)
2.75 20 20 21 40 40 50 50 115 235 520
Weight for Each
Additional 1˝ of
Raise (lbs)
0.1 0.3 0.3 0.4 0.9 0.9 0.9 0.9 1.5 2.9 5.0
Hold-Back Torque Std Ratio 1 2 2 7 8 8 11 11 24 24 92
at Rated Load Optional 0.5 1 0.5 2 0.5 0.5 0.5 0.5 2 2 33
(lb-ft) Optional — 0.5 — 0.5 — — — — — — —