Page 1
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.
Page 2
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
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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.
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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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WARNING
Do not touch any internal parts of limit
switch unless power has been
disconnected.
2. Remove limit s witch co v er.
With the clevises connected, jog actuator to its re-
tracted position, making sure that the rod is
extended at least 1/2” from the jam closed position.
Observe white plastic limit switch nuts and be sure
that neither one travels into a switch. If contact is
imminent, disconnect power and screw nut away
from switch, as described in the next paragraph.
3. Refer to Figure 1 for limit switch nut identification.
Remove the screw “A” and nut guide “B”. Rotate
Section III
Lubrication
the “retract” nut toward the switch until the switch
just clicks. Rotate nut 1/2 tur n (5 slots) farther (to
allow for drift), and install nut guide.
4. Restore power and jog the rod out for a few seconds, then retract it until it is cut off by the limit s witch.
If fine adjustment is needed, disconnect power,
move nut one or two slots at a time and recheck.
The amount of drift can vary widely on Acme screw
models without brakes. On these models, drift will,
in general, be greater under light loads. When setting limit switches, it is best to operate Acme scre w
models at lightest expected load, and to operate
ball screw models at greatest expected load.
5. Jog actuator to its extended position, repeating all
the steps from paragraphs 2-4 f or the “extend” switch
and nut.
3-1. Lubrication
Shell Oil Co. Albida LC Ep #2 (Shell Product Code 70311)
has been thoroughly evaluated in Duff-Norton actuators
and has demonstrated superior lubricating properties affecting both wear life and maximum duty cycle.
Duff-Norton is not aware of an equivalent grease. If this
grease is not available in your area, please contact your
local supplier for their recommendations. Greases containing molybdenum disulfide should never be used.
For severe service conditions, the actuators should be
lubricated more frequently using the above grease (daily
to weekly depending upon the conditions). If duty is heavy ,
an automatic lubrication system is strongly recommended.
1. Lubrication Points - The SuperCylinder has two
grease fittings, one in the worm housing and one at
the tube guide bushing. Shell Albida LC Ep #2 is
recommended for both.
2. Frequency - The lubrication schedule will v ary de-
pending on the severity of use. Lubrication every
50 hours of actual operation is suggested as a guideline.
3. Quantity - During operation, there will be migration
of grease from the worm gear housing into the tube
area. There will also be grease migration from the
outer tube guide bushing into the tube, and possibly some loss through the tube wiper seal. The
actual quantity of grease needed to replace this
grease cannot readily be determined. Using a standard hand-pumped grease gun, a rough rule of
thumb is to inject into each grease fitting one pump
of grease for e very 1000 pounds of actuator capacity
4. Grease Loss - Over time, spent grease will accu-
mulate inside the tube. A considerable volume of
grease can exist there without noticeable effects.
Depending on the orientation of the actuator, it ma y
eventually begin to ooz e grease from the tube v ent
or from the wiper seal. This is not an indication of a
problem, but evidence of internal lubricant circulation. If these grease emissions are objectionable,
the outer tube may be remov ed and surplus grease
cleaned out.
3-2. Motor Reducer Lubrication
Unless loss of oil is apparent, the reducer will not normally require relubrication. For most applications, Mobil
SHC636 synthetic gear oil is the recommended lubricant.
Reducers should be filled approximately half full of oil. A
pipe plug should be apparent at this level, which can be
used as a level plug.
For more detailed discussion of reducer lubrication requirements, refer to the reducer instruction sheet.
3-3. Motor and Reducer Bearings
All standard motors for this product should have permanently sealed and lubricated bearings that do not require
maintenance.
Larger models of motor reducer may hav e g rease fittings
for bearing lubrication. If fittings are e vident on the motor
reducer, they should receive one shot of grease at the
same time the actuator is relubricated.
3-4. Clevis Pins
Clevis pins are very subject to wear and can be a source
of creaking or popping noises. Removal, cleaning, inspection, and regreasing of clevis pins at each scheduled
lubrication is recommended.
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Section IV
Maintenance
Other than the lubrication described in the previous section, regular maintenance should not be required. If
disassembly is required to repair damage or a failure , the
following procedure may be followed.
4-1. Disassembly (Refer to Figure 5-1)
1. Remove SuperCylinder from installation and move
to a work area. Watch for oil spillage from the reducer vent plug.
2. Remove motor, reducer, and limit switch (if fitted).
Each of these can be withdrawn after removing its
four mounting screws.
3. Loosen two setscrews on outer tube. Unscrew tube
and pull off. Clean excess grease from screw and
tube.
4. Remove four screws from each worm flange and
remove flanges. Tap worm to one side.
5. Loosen two setscrews in flange of shell cap. Remove cap with screw and tube assembly.
6. Withdraw worm with bearings.
7. Unless there is a reason for removal, leave clevis
bolted to shell, as there is sealer between the two
parts.
4-4. Screw and Nut Inspection
1. Clean excess grease from the screw and nut.
Inspect the screw thread areas for any wear,
pitting, gouges, spalling, brinelling, or corrosion.
Any deterioration of the thread contact surfaces
is cause for replacement.
2. If screw is undamaged, clamp it in a vise with soft
jaws and check the nut for backlash. Push back
and forth on the nut, without rotation. Movement
should be no more than shown in Table 1. Use a
dial indicator if available.
Table 1
Max.
Screw O.D
1.0" .008"
1.17-2.50" .025"
3.0" .050"
3. It is not uncommon for nuts to exhibit wear before
any damage to the screw. If this is the case, a new
nut can be fitted without screw replacement.
Backlash
4-5. Lifting Nut Removal
4-2. Screw & Tube Disassembly
Note
If problem is isolated to worm gear
area, do not disassemble tube fr om nut.
1. Spread and remove nylon n ut guide from inner end
of translating tube.
2. Loosen two setscrews holding lifting nut. These are
installed with thread locking adhesive and may require heating.
3. Clamp lifting nut in vise. Insert bar in clevis hole
and unscrew translating tube.
4-3. Gear Removal
1. Depending on size, the nut holding on the worm
gear may be self-locking or ma y use a pin or a setscrew for retention. Remov e pin or loosen setscrew
if used.
2. Clean all grease from an area of the screw and
clamp that area in a vise with soft jaws. Remove
the gear nut. Use an impact wrench on hex nuts, if
available.
3. Pull gear from screw. There may be slight resistance, but this should not be a hard pull.
4. Keep bearing races together and note which one
was in each location.
Note
Removal of a ball nut fr om the screw is
not recommended unless there is a
reason to do so.
1. Clamp screw in vise with soft jaws and use an impact wrench to loosen the stop washer bolt in the
end of the screw. This bolt is installed with high
strength locking adhesive. The use of heat is recommended.
2. Acme screw nuts can then be remov ed without precaution. Ball screw nuts, if already determined to
need replacement, can be screwed off, with balls
being lost as it comes off the screw.
3. If ball nuts are to be reused, it is recommended that
an arbor be made for capturing balls. This will eliminate the need to reload balls. The arbor can be
made from any stiff material and should be about
2” longer than the ball nut. A piece of tubular material is easier to secure inside the nut, but a solid bar
can be used. Arbor diameters are giv en in T ab le 2.
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Table 2
Screw O.D. Arbor Dia.
1.0" .88"
1.17" .88"
1.5" 1.156"
2.25" 1.88"
2.5" 2.24"
3.0" 2.50"
4. Hold arbor tight against and symmetric with the end
of the screw (a pilot to engage in the screw hole is
helpful). T urn the nut down the screw and contin ue
running it over the arbor until it is completely off the
screw.
5. Use wire, tape, cable ties, or similar to prevent the
arbor from falling through the nut.
4-6. Cleaning
Clean all parts and inspect for wear or damage.
WARNING
Provide adequate ventilation during
the use of cleaning agents; avoid
prolonged breathing of fumes and
contact with skin. Read & follow
manufacturer's instructions.
1. Use degreasing solvent to remove g rease or oil from
all parts.
Note
Remove grease from unit and do not
reuse old grease.
Before installing new parts, remove any
rust preventive, pr otection grease, etc.
2. Use clean hot water or a soap solution for general
cleaning of painted surfaces.
3. Dry parts thoroughly after cleaning.
4-7. Inspection (Refer to Figure 5-1)
Inspect bearings for damaged race surfaces . Inspect seals
for cut or brittle lips.
Replace any defectiv e parts, using only Duff-Norton supplied or approved parts
4-8. Assembly (Refer to Figure 5-1)
1. Install lifting nut on screw . Hold ball nut arbor against
screw and twist on nut, being careful not to lose
balls.
2. Install stop washer and bolt. Use high strength
thread locking adhesive on bolt.
3. Place screw bushing (if used) and shell cap on
screw. Place load bearings on worm gear and install on screw. If working load is primarily in one
direction, the bearing locations can be swapped
from original, to increase service life.
4. Securely tighten worm gear nut and install locking
device, if used.
5. Fill translating tube about half full of grease (see
Section 3-1). Screw translating tube onto lifting nut.
If new nut is being used, spot drill the nut threads
for the setscrews .
Setscrews must not protrude above the surface of
the tube, to avoid interf erence with n ylon nut guide.
Note
It is critical that these setscrews be
spot-drilled, tightened, and secured
with thread locking adhesive.
6. Insert worm with bearings into the shell. Be sure it
is pointing the right way to fit the drive and limit
switch. Do not install flanges yet.
7. Insert screw with gear and bearings into shell.
Tighten shell cap to previous location, evident from
setscrew indentations, or until bearings are completely seated. Bearings should be preloaded to
provide slight drag. If par ts replacement has resulted in the setscrews not engaging with original
indentations, lightly spot drill actuator shell at new
setscrew locations.
8. Center worm in housing and install bearing flanges
(with seals), with original shims. Tighten flange
screws. Tap each end of worm to seat bearings
and recheck flange screws for tightness. Worm
should turn without binding, and also without noticeable end play. Add or remo ve shims to achieve
this situation.
9. Pump grease into housing (see Section 3-1) until
grease oozes between screw and shell cap.
10. Be sure nylon nut guide is in place.
11. Be sure guide bushing and wiper seal are in outer
tube. Slide outer tube over translating tube and
screw all the way onto shell cap. Tube may be
backed off up to one turn to align grease fitting.
Tighten outer tube setscrews.
12. Put a few pumps of grease into the guide bushing
grease fitting. If the screw has been well greased,
only a small amount is needed in the bushing area
at this time.
13. Reinstall reducer and motor , checking f or any w ear
or damage in those components. Replace motor
bearings if noisy . Reinstall limit switch. Limit s witch
will require readjustment (see Section 2-6) after installation of SuperCylinder.
14. Check reducer oil level after installation.
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Section V
Illustrated Parts List
5-1. General
The following e xploded parts views show the components
of the Duff-Norton SuperCylinder. Due to the wide range
of models and configurations, exact part numbers are not
shown. To order parts, contact Duff-Norton with the
SuperCylinder model number (example: R0530B47-123)
and the item number from the following illustrations.
This section contains an exploded illustration of the DuffNorton SuperCylinder. The n umber adjacent to each part
on the illustration is the index number . K eyed to this inde x
number on the parts list is the part name.
When ordering parts be sure to include:
1. The nameplate model of your unit.
2. Index number and name of part.
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Page 9
Index
No Part Name
1 Shell 1 16 Retaining ring 1
2 Load bearing 2 17 Guide bushing 1
3 Worm gear 1 18 Outer tube 1
4 Screw bushing 1 1 9 Shell (adapter) cap 1
5 Lock nut 5 2 0 Setscrew 1
6 Screw 1 21 Setscrew 1
7 Key 1 2 2 Vent 1
8 Stop disc 1 2 3 Grease fitting 2
9 Stop bolt 1 2 4 Grease seal 2
10 Lifting nut 1 2 5 Flange 2
1 1 Nut guide 1 2 6 Worm bearing 2
1 2 Spiral ring 2 2 7 Wor m 1
13 Translating tube 1 28 Clevis bracket 1
14 Setscrew 1 29 Screw 4
1 5 Wiper seal 1
Qty.
Req.
Index
No Part Name
Qty.
Req.
Use only replacement
parts supplied by or
approved b y Duff-Norton.
Non-authorized parts may
be inadequate, resulting
in serious injury or death
in event of failure.
Figure 5-1. Exploded Illustration for Duff-Norton
SuperCylinder Series
Warning
9
Page 10
Warning
Use only replacement
parts supplied by or
approved b y Duff-Norton.
Non-authorized parts may
be inadequate, resulting
in serious injury or death
in event of failure.
Index
No Part Name
10 1 Limit switch assembly 1
10 2 Limit switch bracket 1
10 3 Reducer adapter 1
104 Reducer 1
105 Motor 1
10 6 Coupling 1
10 7 C-face adapter 1
Qty.
Req.
10
Figure 5-2. Exploded Illustration of Duff-Norton
SuperCylinder Parallel Configuation
Page 11
Index
No Part Name
10 1 Limit switch assembly 1
10 2 Limit switch bracket 1
10 3 Reducer adapter 1
104 Reducer 1
105 Motor 1
10 6 Coupling 1
10 7 C-face adapter 1
Qty.
Req.
Warning
Use only replacement
parts supplied by or
approved b y Duff-Norton.
Non-authorized parts may
be inadequate, resulting
in serious injury or death
in event of failure.
Figure 5-3. Exploded Illustration of Duff-Norton
SuperCylinder Right Angle Configuration
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© 2005 Yale Industrial Products, Inc.
P.O. Box 7010
Charlotte, NC 28241-7010
Customer Service (800) 477-5002
FAX (704) 588-1994
Email: duffnorton@cmworks.com
www.duffnorton.com
SK9800-100
200/0405
ECO 97552
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