Duff-Norton SCW02-03 Owner's manual

Brand: Duff-Norton

Model: SCW02-03

Type: Owner's 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

Section I

General Introduction

1-1. General

This manual contains installation and maintenance in-

structions for Duff-Norton SuperCylinders. It may be

supplemented by individual instructions for the motor,

brake, or gear reducer used as part of the SuperCylinder.

To ensure satisfactory 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 for moving people.

2. Do not use actuators with standard motors in ar-

eas containing flammable vapors, liquids, gases

or combustible dusts or fibers. Refer to Article

500 of

The National Electric Code.

Do not use in

highly corrosive or wet environments. Do not use

in applications involving extended exposure to tem-

peratures 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 Duff-

Norton for expected values.

1-3. Specifications

Table 1-1 gives lifting capacity, speed, and horsepower

for standard models of SuperCylinders. Other configu-

rations 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.

1-4. Important Precautions

In order to ensure that Duff-Norton acutators provide

good service over a period of years the following pre-

cautions should be taken:

1. SuperCylinders are normally supplied without con-

trols. The installer must provide adequate electrical

controls that provide motor thermal protection and

incorporate limit switches to ensure that the ac-

tuator 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 applica-

tions where overloading is a possibility, appropriate

electronic or mechanical devices should be incor-

porated to prevent operation of the actuator if

overloaded.

3. Do not install an electric motor on a SuperCylinder

with horsepower rating greater than that shown in

Table 1.

1-5. Warranty and Warranty Repair

Subject to the conditions stated herein, Duff-Norton will

repair or replace, without charge, any parts proven to Duff-

Norton’s satisfaction to have been defective in material or

workmanship. Claims must be made within one year af-

ter 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 manu-

facture 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, DUFF-

NORTON MAKES NO OTHER WARRANTIES, EXPRESS

OR IMPLIED, INCLUDING WARRANTIES OF MER-

CHANTABILITY AND FITNESS FOR A PARTICULAR

PURPOSE.

If you have any questions concerning warranty repair,

please contact Duff-Norton. Authorization for return must

be received from Duff-Norton before returning any equip-

ment for inspection or warranty repair.

CAUTION

Do not allow actuator travel to go

beyond specified (catalog) closed

height, or serious damage to internal

mechanism may result.

Section II

Installation

The Duff-Norton SuperCylinder can be used in an unlim-

ited number of positions and applications. Consequently,

installation procedures will vary depending on the envi-

ronment.

2-1. Inspection

Check the SuperCylinder for any shipping damage. Be

sure that motor fan does not rub fan shroud. Look for any

attached hardware, including a gearbox vent 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 exact

nominal size. Duff-Norton 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. For extreme service, mount

the clevis pins on outboard bearings.

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° incre-

ments to provide clearances where needed. In

addition the actuator worm can be flipped end-for-

end 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

should be replaced with the vented plug shipped

with the unit. In general, 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, ex-

cess 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 water entry. The

exact technique will depend on orientation and de-

gree 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; however, if any

water is collecting on this vent, the high volume of air pass-

ing 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, se-

cured in a downward position. Use a tubing large enough

to avoid capillary suction in the tube.

2-5. Wiring

Wiring of motor, brake, and/or limit switch should be done

according to the wiring diagrams supplied with those com-

ponents. All wiring should be according to local and

national electrical codes. Motor controls should be prop-

erly 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 cable to allow for movement 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 travel re-

quired by the installation. If there is any question

about this, the rod end clevis pin should be discon-

nected and the rod rotated by hand, in each

direction, to its internal stops. The length of ex-

tended rod can be measured in these two extremes

and the measurements used for reference while

setting limit switches.

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 af-

fecting 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 con-

taining 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 vary de-

pending on the severity of use. Lubrication every

50 hours of actual operation is suggested as a guide-

line.

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 possi-

bly some loss through the tube wiper seal. The

actual quantity of grease needed to replace this

grease cannot readily be determined. Using a stan-

dard hand-pumped grease gun, a rough rule of

thumb is to inject into each grease fitting one pump

of grease for every 1000 pounds of actuator capac-

ity

4. Grease Loss - Over time, spent grease will accu-

mulate inside the tube. A considerable volume of

Section III

Lubrication

grease can exist there without noticeable effects.

Depending on the orientation of the actuator, it may

eventually begin to ooze grease from the tube vent

or from the wiper seal. This is not an indication of a

problem, but evidence of internal lubricant circula-

tion. If these grease emissions are objectionable,

the outer tube may be removed and surplus grease

cleaned out.

3-2. Motor Reducer Lubrication

Unless loss of oil is apparent, the reducer will not nor-

mally 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 re-

quirements, refer to the reducer instruction sheet.

3-3. Motor and Reducer Bearings

All standard motors for this product should have perma-

nently sealed and lubricated bearings that do not require

maintenance.

Larger models of motor reducer may have grease fittings

for bearing lubrication. If fittings are evident 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, inspec-

tion, and regreasing of clevis pins at each scheduled

lubrication is recommended.

2. Remove limit switch cover.

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

the “retract” nut toward the switch until the switch

just clicks. Rotate nut 1/2 turn (5 slots) farther (to

allow for drift), and install nut guide.

4. Restore power and jog the rod out for a few sec-

onds, then retract it until it is cut off by the limit switch.

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 set-

ting limit switches, it is best to operate Acme screw

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 for the “extend” switch

and nut.

WARNING

Do not touch any internal parts of limit

switch unless power has been

disconnected.

Other than the lubrication described in the previous sec-

tion, 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 re-

ducer 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. Re-

move 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.

4-2. Screw & Tube Disassembly

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.

Section IV

Maintenance

Table 1

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.

4-5. Lifting Nut Removal

1. Spread and remove nylon nut guide from inner end

of translating tube.

2. Loosen two setscrews holding lifting nut. These are

installed with thread locking adhesive and may re-

quire 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 may use a pin or a set-

screw for retention. Remove 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 resis-

tance, but this should not be a hard pull.

4. Keep bearing races together and note which one

was in each location.

1. Clamp screw in vise with soft jaws and use an im-

pact 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 rec-

ommended.

2. Acme screw nuts can then be removed without pre-

caution. 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 elimi-

nate 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 mate-

rial is easier to secure inside the nut, but a solid bar

can be used. Arbor diameters are given in Table 2.

Note

If problem is isolated to worm gear

area, do not disassemble tube from nut.

Screw O.D

Max.

Backlash

1.0" .008"

1.17-2.50" .025"

3.0" .050"

Note

Removal of a ball nut from the screw is

not recommended unless there is a

reason to do so.

4. Hold arbor tight against and symmetric with the end

of the screw (a pilot to engage in the screw hole is

helpful). Turn the nut down the screw and continue

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.

3. Place screw bushing (if used) and shell cap on

screw. Place load bearings on worm gear and in-

stall 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 interference with nylon nut guide.

Table 2

1. Use degreasing solvent to remove grease or oil from

all parts.

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 defective parts, using only Duff-Norton sup-

plied 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.

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 com-

pletely seated. Bearings should be preloaded to

provide slight drag. If parts replacement has re-

sulted 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 no-

ticeable end play. Add or remove 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 for any wear

or damage in those components. Replace motor

bearings if noisy. Reinstall limit switch. Limit switch

will require readjustment (see Section 2-6) after in-

stallation of SuperCylinder.

14. Check reducer oil level after installation.

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"

WARNING

Provide adequate ventilation during

the use of cleaning agents; avoid

prolonged breathing of fumes and

contact with skin. Read & follow

manufacturer's instructions.

Note

Remove grease from unit and do not

reuse old grease.

Before installing new parts, remove any

rust preventive, protection grease, etc.

Note

It is critical that these setscrews be

spot-drilled, tightened, and secured

with thread locking adhesive.

Section V

Illustrated Parts List

5-1. General

The following exploded 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 Duff-

Norton SuperCylinder. The number adjacent to each part

on the illustration is the index number. Keyed to this index

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.

Figure 5-1. Exploded Illustration for Duff-Norton

SuperCylinder Series

Warning

Use only replacement

parts supplied by or

approved by Duff-Norton.

Non-authorized parts may

be inadequate, resulting

in serious injury or death

in event of failure.

Index

No Part Name

Qty.

Req.

Index

No Part Name

Qty.

Req.

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 19 Shell (adapter) cap 1

5 Lock nut 5 20 Setscrew 1

6 Screw 1 21 Setscrew 1

7 Key 1 22 Vent 1

8 Stop disc 1 23 Grease fitting 2

9 Stop bolt 1 24 Grease seal 2

10 Lifting nut 1 25 Flange 2

11 Nut guide 1 26 Worm bearing 2

12 Spiral ring 2 27 Worm 1

13 Translating tube 1 28 Clevis bracket 1

14 Setscrew 1 29 Screw 4

15 Wiper seal 1

Figure 5-2. Exploded Illustration of Duff-Norton

SuperCylinder Parallel Configuation

Warning

Use only replacement

parts supplied by or

approved by Duff-Norton.

Non-authorized parts may

be inadequate, resulting

in serious injury or death

in event of failure.

Index

No Part Name

Qty.

Req.

101 Limit switch assembly 1

102 Limit switch bracket 1

103 Reducer adapter 1

104 Reducer 1

105 Motor 1

106 Coupling 1

107 C-face adapter 1

Figure 5-3. Exploded Illustration of Duff-Norton

SuperCylinder Right Angle Configuration

Warning

Use only replacement

parts supplied by or

approved by Duff-Norton.

Non-authorized parts may

be inadequate, resulting

in serious injury or death

in event of failure.

Index

No Part Name

Qty.

Req.

101 Limit switch assembly 1

102 Limit switch bracket 1

103 Reducer adapter 1

104 Reducer 1

105 Motor 1

106 Coupling 1

107 C-face adapter 1

SK9800-100

200/0405

ECO 97552

P.O. Box 7010

Charlotte, NC 28241-7010

Customer Service (800) 477-5002

FAX (704) 588-1994

Email: duffnor[email protected]

www.duffnorton.com

Duff-Norton SCW02-03 Owner's manual

Brand: Duff-Norton

Model: SCW02-03

Type: Owner's manual

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Duff-Norton SCW02-03 Owner's manual

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