Duff-Norton SK-9800-100 User Manual
Publication Part No.
SK9800-100
CAUTION
This manual contains important information for the correct installation, operation and maintenance of the
equipment described herein. All persons involved in such installation, operation, and maintenance should be
thoroughly familiar with the contents. To safeguard against the possibility of personal injury or property
damage, follow the recommendations and instructions of this manual and keep it for further reference.
WARNING
Improper use can result in personal injury. To avoid injury:
• Do not use actuators to lift, support, or transport people or
loads over people without written approval from Duff-Norton.
• Read all product warnings and operating instructions.
Contents
Section I General Introduction ...................................................................................................3
1-1. General...............................................................................................................3
1-2. Applications ........................................................................................................3
1-3. Specifications .....................................................................................................3
1-4. Important Precautions ........................................................................................3
1-5. Warranty and Warranty Repair ...........................................................................3
Section II Installation ..................................................................................................................4
2-1. Inspection ...........................................................................................................4
2-2. Clevis Pins..........................................................................................................4
2-3. Orientation ..........................................................................................................4
2-4. Vent plugs ...........................................................................................................4
2-5. Wiring..................................................................................................................4
2-6. Limit Switch Adjustment .....................................................................................4
Section III Lubrication ..................................................................................................................5
3-1. Lubrication ..........................................................................................................5
3-2. Motor Reducer Lubrication .................................................................................5
3-3. Motor and Reducer Bearings..............................................................................5
3-4. Clevis Pins..........................................................................................................5
Section IV Maintenance ...............................................................................................................6
4-1. Disassembly (Refer to Figure 5-1)......................................................................6
4-2. Screw & Tube Disassembly ................................................................................6
4-3. Gear Removal.....................................................................................................6
4-4. Screw and Nut Inspection...................................................................................6
Table 1 ........................................................................................................................6
4-5. Lifting Nut Removal ............................................................................................6
Table 2 ........................................................................................................................7
4-6. Cleaning .............................................................................................................7
4-7. Inspection (Refer to Figure 5-1)..........................................................................7
4-8. Assembly (Refer to Figure 5-1)...........................................................................7
Section V Illustrated Parts List ....................................................................................................8
5-1. General...............................................................................................................8
Figure 5-1. Exploded Illustration for Duff-Norton
SuperCylinder Series..................................................................................................9
Figure 5-2. Exploded Illustration of Duff-Norton
SuperCylinder Parallel Configuation.........................................................................10
Figure 5-3. Exploded Illustration of Duff-Norton
SuperCylinder Right Angle Configuration.................................................................11
2
Section I
General Introduction
1-1. General
This manual contains installation and maintenance instructions for Duff-Norton SuperCylinders. It may be
supplemented by individual instructions for the motor,
brake, or gear reducer used as part of the SuperCylinder.
T o ensure satisf actory service, read and understand the
information in this and any accompanyng literature .
1-2. Applications
1. Industrial Use Only The linear actuators de-
scribed 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 statement from Duff-Norton
which authorizes the specific actuator unit, as used
in your application, as suitable f or moving people.
2. Do not use actuators with standard motors in areas containing flammable vapors, liquids, gases
or combustible dusts or fibers. Refer to Article
500 of
highly corrosive or wet environments . Do not use
in applications involving e xtended exposure to temperatures below -20°F or above 140°F.
3. The actuator rod clevis must be restrained from
rotating. The amount of restraining torque is a
function of screw geometry and load. Consult DuffNorton for expected values.
The National Electric Code.
Do not use in
1-3. Specifications
Table 1-1 gives lifting capacity, speed, and horsepower
for standard models of SuperCylinders. Other configurations are possible and will be labeled with rated
capacity and electrical data.
If you need additional help, please contact Duff-Norton
at (800) 477-5002.
3. Do not install an electric motor on a SuperCylinder
with horsepower rating greater than that shown in
Table 1.
CAUTION
Do not allow actuator travel to go
beyond specified (catalog) closed
height, or serious damage to internal
mechanism may result.
1-5. Warranty and Warranty Repair
Subject to the conditions stated herein, Duff-Norton will
repair or replace, without charge, any parts proven to DuffNorton’s satisfaction to hav e been def ective in material or
workmanship. Claims must be made within one year after date of shipment. Duff-Norton will not repair or replace
any parts that become inoperative because of improper
maintenance, eccentric loading, overloading, chemical or
abrasive action, excessive wear, or other abuse.
Equipment and accessories not of Duff-Norton's manufacture are warranted only to the extent that they are
warranted by the manufacturer, and only if the claimed
defect arose during normal use, applications and service.
Equipment which has been altered or modified by anyone
without Duff-Norton's authorization is not warranted by
Duff-Norton. EXCEPT AS STATED HEREIN, DUFFNORTON MAKES NO O THER WARRANTIES, EXPRESS
OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE.
If you have any questions concerning warranty repair,
please contact Duff-Norton. Authorization f or return must
be received from Duff-Norton before returning any equipment for inspection or warranty repair.
1-4. Important Precautions
In order to ensure that Duff-Norton acutators provide
good service over a period of years the following precautions should be taken:
1. SuperCylinders are normally supplied without controls. The installer must pro vide adequate electrical
controls that provide motor thermal protection and
incorporate limit switches to ensure that the actuator is not jammed against internal or external
stops.
2. SuperCylinders do not incorporate any protection
against mechanical overloading, either externally
applied or through internal jamming. In applications where overloading is a possibility , appropriate
electronic or mechanical devices should be incorporated to prevent operation of the actuator if
overloaded.
3
Section II
Installation
The Duff-Norton SuperCylinder can be used in an unlimited number of positions and applications. Consequently,
installation procedures will vary depending on the environment.
2-1. Inspection
Check the SuperCylinder for any shipping damage. Be
sure that motor fan does not rub fan shroud. Look f or any
attached hardware, including a gearbox v ent plug (reducer
models only).
2-2. Clevis Pins
The SuperCylinder should be attached with steel clevis
pins that are a close fit in the clevis holes. Holes are
slightly oversized to accommodate pins that are the e xact
nominal size. Duff-Nor ton recommends the use of pins
with hardness of at least Rockwell C-28. Socket head
cap screws or SAE grade 5 screws may be used, if their
length is such that the threaded portion is not placed in
shear.
Use of an anti-sieze compound or extreme pressure
grease on the clevis pins will reduce wear and possible
noise. Clevis pins may be drilled and fitted with grease
fittings to simplify relubrication. F or extreme service, mount
the clevis pins on outboard bearings.
should be replaced with the vented plug shipped
with the unit. In gener al, the plug nearest the top of
the reducer should be replaced with the vent plug.
Failure to vent the gearbox will lead to loss of oil
and premature gearbox failure.
2. SuperCylinder tube venting: This vent is critical in
preventing blown out seals and/or water entry into
the actuator. Depending on the orientation of the
SuperCylinder and the relubrication schedule, excess grease may occaisionally be pumped out of
this vent. This is normal and necessary.
3. Replumbing of vents in wet locations: If
SuperCylinder is subject to wet conditions, vents
should be repositioned to prevent w ater entry. The
exact technique will depend on orientation and degree of moisture.
The reducer vent has a hex key socket. Any water that
stands in this recess will enter the reducer and cause
bearing failure. The tube vent has a hood; ho wev er , if any
water is collecting on this vent, the high volume of air passing through the vent can suck water into the actuator. A
street elbow can be used to cause either vent to point
down. Another option is to replace the vent with a hose
barb fitting and attach several inches of vinyl tubing, secured in a downward position. Use a tubing large enough
to avoid capillary suction in the tube.
2-3. Orientation
1. The application will usually dictate the orientation
of the SuperCylinder. In applications exposed to
dripping water or dirt, pointing the tube down is
prefered, to reduce the entry of foreign material.
2. All major components of the SuperCylinder (motor,
reducer, limit switch) can be rotated in 90° increments to provide clearances where needed. In
addition the actuator worm can be flipped end-forend to change reducer mounting side. Non-standard
orientations will be factory provided when requested.
Refer to SuperCylinder catalog.
3. Factory orientation of the outer tube grease plug
and vent plug is random (tube is screwed down
tight). When required, the outer tube set screws
can be loosened and the tube rotated up to one
turn to relocate the grease fitting.
2-4. Vent plugs
The pumping action of the tube extension and retraction,
as well as temperature changes, require that the
SuperCylinder tube and the motor reducer gearbox (if
used) be vented to atmosphere.
1. Reducer venting: The motor gear reducer (if used)
has a number of pipe plugs at various locations.
The reducer is shipped filled with oil and with solid
pipe plugs in every location. One of these plugs
4
2-5. Wiring
Wiring of motor, brake , and/or limit switch should be done
according to the wiring diagrams supplied with those components. All wiring should be according to local and
national electrical codes. Motor controls should be properly sized to provide adequate motor overload protection.
See motor nameplate as to any internal motor protection.
Three phase motors must be trial connected to check for
proper phasing relative to controls and limit switches.
Wiring connections to the SuperCylinder must be made
with flexible conduit or cab le to allow f or mov ement of the
actuator during its operation.
2-6. Limit Switch Adjustment
Limit switches (if fitted) are not factory set and must be
adjusted to prevent jamming and damage to the actuator
and/or mating equipment.
1. Before setting limit switches, the installer should
make certain that the actuator has sufficient travel
in both directions to produce the range of trav el required by the installation. If there is any question
about this, the rod end clevis pin should be disconnected and the rod rotated by hand, in each
direction, to its internal stops. The length of extended rod can be measured in these two extremes
and the measurements used for reference while
setting limit switches.
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