Duff-Norton SK2463-22 (Modular Actuator Acme Screw) - Manual (Page 3)

3
Section I
Introduction
1-1. General
This manual provides instructions for the installation, op-
eration, and maintenance of the Duff-Norton® Modular
Actuator. It includes proper procedures for the disas-
sembly, 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 il-
lustrated in this manual are intended for industrial use
only and should not be used to lift, transport, or other-
wise 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 in-
volving 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 Para-
graph 4-1, "Improper Loading".)
NOTE
If in doubt about the suitability of the actua-
tor 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 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 heat, 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 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 by the Duff-Norton
Company before any equipment may be returned for in-
spection or warranty repair.
Duff-Norton's Modular Actuator is designed to be a ver-
satile piece of equipment which can be used in many
different applications; consequently, installation proce-
dures 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 install-
ing the motor on the actuator, see Paragraph 5-5, steps
19-21 (these steps apply to both Rotating Screw and Trans-
lating Tube actuators).
2-2. Installation of the Actuator
The actuator has two bolt patterns for convenient attach-
Section II
Installation
ment of the actuator to the application: both the two-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 incorpo-
rated in the installation to prevent overtravel of the actuator
in either direction and to protect the actuator against in-
ternal jamming. Duff-Norton limit switches to fit this
actuator are available at an additional cost.