Duff-Norton SK2463-22 User Manual

Publication Part No.
SK-2463-22
Translating Tube Actuators
Model Numbers M-2464 & M-2465
Rotating Screw Actuators
Model Numbers M-2462 & M-2463
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
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 Introduction.................................................................................................................3
1-1. General...............................................................................................................3
1-2. Intended Use .......................................................................................................3
1-3. Safety Considerations.........................................................................................3
1-4. Unwarranted Applications....................................................................................3
1-5. Warranty and Warranty Repair ............................................................................3
Section II Installation ..................................................................................................................3
2-1. Motor Installation .................................................................................................3
2-2. Installation of the Actuator ...................................................................................3
2-3. Limit Switches......................................................................................................3
Section III Dimensions and Specifications...................................................................................4
3-1. Dimensions - Rotating Screw Actuators .............................................................4
3-2. Dimensions - Translating Tube Actuators............................................................4
3-3. Specifications .....................................................................................................5
Section IV Operation, Maintenance, and Inspection....................................................................5
4-1. Improper Loading ...............................................................................................5
4-2. Clevis Pins..........................................................................................................5
4-3. Lubrication ..........................................................................................................5
4-4. Inspection ...........................................................................................................5
Section V Disassembly and Assembly........................................................................................6
5-1. Lubricant.............................................................................................................6
5-2. Required Tools....................................................................................................6
5-3. General Procedures ...........................................................................................6
5-4. Disassembly - Rotating Screw Actuators (Models M-2462 and M-2463) ...........6
5-5. Assembly - Rotating Screw Actuators (Models M-2462 and M-2463)................6
5-6. Disassembly - Translating Tube Actuators (Models M-2464 and M-2465)..........8
5-7. Assembly - Translating Tube Actuators (Models M-2464 and M-2465)...............8
Section VI Illustrated Parts List ............................................................................................... ...10
6-1. General.............................................................................................................10
6-2. Parts List for Rotating Screw Actuators............................................................11
6-3. Parts List for Translating Tube Actuators (Models M-2464 and M-2465) ..........12
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Section I
Introduction
1-1. General
This manual provides instructions for the installation, op­eration, and maintenance of the Duff-Norton® Modular Actuator. It includes proper procedures for the disas­sembly , cleaning, inspection, rebuilding, lubrication, and assembly of the actuator. To ensure efficient and long, satisfactory use of this unit, read and understand the information herein, and follow the instructions closely.
1-2. Intended Use
The Duff-Norton® Modular Actuators described and il­lustrated in this manual are intended for industrial use only and should not be used to lift, transport, or other­wise support people.
1-3. Safety Considerations
1. Avoid touching exterior surfaces of the actuator. Surface temperatures may reach 230 ° F during prolonged use.
2. Make certain that the electric motor used conforms to the requirements of the actuator.
1-4. Unwarranted Applications
CAUTION
These actuators are not recommended or warranted for use in applications in­volving the following activities or conditions:
1. Lifting, supporting, or positioning of people where a malfunction might result in bodily injury.
2. Side loading or binding of the actuator. (See Par a­graph 4-1, "Improper Loading".)
NOTE
If in doubt about the suitability of the actua­tor for you application, consult the Duff-Norton Engineering Department.
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 defectiv e 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 heat, 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, DUFF­NORT ON MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WARRANTIES OF MER­CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
If you have any questions concerning warranty repair, please consult a Duff-Norton Warehouse and Customer Service Center for the name and address of your nearest Duff-Norton actuator warranty repair facility.
Authorization for return must be granted b y the Duff-Norton Company before any equipment may be returned for in­spection or warranty repair.
Section II
Installation
Duff-Norton's Modular Actuator is designed to be a ver­satile piece of equipment which can be used in many different applications; consequently, installation proce­dures will vary widely with customer requirements

2-1. Motor Installation

The Modular Actuator is designed to accept a standard NEMA 56 frame electric motor with C-face mounting, to be supplied by the customer. For instructions on install­ing the motor on the actuator, see Paragraph 5-5, steps 19-21 (these steps apply to both Rotating Screw and T rans­lating Tube actuators).

2-2. Installation of the Actuator

The actuator has two bolt patterns for convenient attach-
ment of the actuator to the application: both the tw o-hole pattern (17/32-inch unthreaded holes 4 inches apart) and the four-hole pattern (1/2-20 threaded holes on a 2.55 inch square) can be used to bolt the actuator to a wide variety of mounting points; the four-hole pattern will also accept standard hydraulic type end fittings.
The lifting nut (on Rotating Screw actuators) and the clevis end (on Traslating Tube actuators) must be restrained against rotation in order for the actuator to lift its load.

2-3. Limit Switches

Duff-Norton recommends that limit switches be incorpo­rated in the installation to prevent o vertravel of the actuator in either direction and to protect the actuator against in­ternal jamming. Duff-Norton limit switches to fit this actuator are available at an additional cost.
3

Section III

Dimensions and Specifications

3-1. Dimensions - Rotating Screw Actuators (Models M-2462 and M-2463)

Warning
Use only replacement parts supplied by or approved by Duff-Norton. Non­authorized parts may be inadequate, resulting in serious injury or death in event of failure.

3-2. Dimensions - Translating Tube Actuators (Models M-2464 and M-2465)

4
q
g
p
p
p
p

3-3. Specifications

Tor
Model No. Screw Dia.
M-2462 M-2464
M-2463 M-2465
NOTE: 1. Models M-2462 and M-2464 are self-lowering and a motor brake should be used.
.875 Dia. Acme .25 Pitch R.H. Double
1.0 Dia. Acme .25 Pitch R.H. Single
2. Models M-2463 and M-2465 may drift 0.75 in (20:1 ratio) to 2.0 in (5:1 ratio) when the motor is shut off. If this is undesirable, a motor brake should be used.
Worm/ 1"
Travel
Ratio Ratio Ratio
5:1 20:1 5:1 20:1 5:1 20:1 5:1 20:1 5:1 20:1 5:1 20:1
10 40 39 18
20 80 29
ueTurns of Liftin
lb/in @
1000 lb Load
14
Motor
RPM
1725 300 700 500 1000 700 1500 170 43 1140 450 1000 700 1500 1100 2000 114 28 1725 400 900 600 1400 900 2000 8 6 2 1 1140 600 1400 900 2000 1400 2000 57 1 4
1/3 h
Motor Motor
Rated Load
1/2 h
Ratio
3/4 h
Motor
Ratio

Section IV

Operation, Maintenance, and Inspection

4-1. Improper Loading

Warning
The actuator must NOT be subjected to side loading or binding (i.e., a bending moment across the actuator) at any point in its travel. It is the responsibility of the installer to ensure that the mounting points cannot transmit such loading to the actuator anywhere between full retraction and full extension. F ailure to observe this warning will void the warranty on the ac­tuator.

4-2. Clevis Pins

The axes of the clevis pins should be parallel so that the actuator can pivot without binding. A few drops of oil should be applied to the clevis pins on installation and periodi­cally thereafter.

4-3. Lubrication

The actuator is lubricated at the factory with Shell Albida LC EP#2 (Shell Oil Co. product code 70311). This grease has been thoroughly evaluated b y Duff-Norton and dem­onstrated to provide superior actuator life. Other greases may provide satisfactory service, with some acceleration of wear. Only high quality, NLGI #2EP, lithium based greases should be used.
The actuator should be lubricated periodically (see NOTE under Paragraph 4-4, "Inspection"), using the grease fit­ting. On Rotating Screw actuators, the lifting screw and nut can be lubricated by painting a light coat of grease on the screw at a point that passes through the nut. To lubri­cate the lifting screw and nut on a Translating Tube actuator, first loosen the set scre ws and unscrew the outer tube from the housing to expose the lifting screw threads .
The actuator should be disassembled, cleaned, inspected, and relubricated after 500,000 inches of travel under nor­mal conditions, or earlier if the need is indicated by inspection or by a squealing from the lifting screw and nut area. Follow the instructions in Section V to o verhaul the actuator.

4-4. Inspection

The actuator should be inspected periodically (see NOTE below), with attention given to the following items:
1. Clevis ends for wear , cracks, distortion, or other deg­radation or damage.
2. Loose belts, screws, or other hardware on the ac­tuator or its mounting points.
3. Limit switches (if so equipped) for proper setting and operation.
4. Lifting screw, lifting nut, and gear set for excessive wear or lack of lubrication (see instructions under Paragraph 4-3, "Lubrication").
Any of the above deficiencies should be corrected bef ore the actuator is returned to service.
NOTE
Periodic Inspection and Lubrication: The ex­act periods for inspection and lubrication of the actuator cannot be predetermined be­cause of the many variables involved, such as frequency of operation, type and magni­tude of loading, and operational environment. Determination should be based on the user's experience. It is recommended that the user begin with a weekly inspection, extending the inspection period to monthly, quarterly, or annually, based on his weekly experience.
S
eed
in/min
Ratio
5
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