Duff-Norton SK6415-200 User Manual

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!

The equipment shown in this manual is intended for industrial use only and should not be used to lift, support, or otherwise
transport people unless authorized in writing by Duff-Norton.

TABLE OF CONTENTS

PAGE

SECTION I

1-1
1-2
1-3
1-4

TABLE 1-4

TABLE 1-4-1

1-5

FIGURE 1-6

SECTION II

2-1
2-2
2-3
2-4

SECTION III

3-1

SECTION IV

4-1
4-2
4-3
4-4
4-5

GENERAL INFORMATION

General 3
Industrial Use Only 3
Factory Preparation 3
Specifications 3
6415 Series DC Actuator Specifications 3
6415 Series DC Super Pac Actuator Duty Cycle 3
Warranty and Warranty Repair 3
Dimensions and Specifications 4

INSTALLATION

Installation Procedures 5
Limit Switch Adjustment 5
Post-Installation Procedures 5
Potentiometer Adjustment 6

OPERATION

Operational Procedures 6

MAINTENANCE

Lubrication 7
Required Tools 7
General Procedures 7
Disassembly 7
Assembly 8

SECTION V

FIGURE 5-1

5-1

SECTION VI

6-1
FIGURE 6-1A
FIGURE 6-1B

6-2

FIGURE 6-2

6-3

ILLUSTRATED PARTS LIST

Exploded Illustration 6415 & 7415 AC Actuator 12
Parts List 13

TECHNICAL ILLUSTRATIONS

Brake Alignment 14
Brake Spring, Motor and Pinion Coupling Alignment 14
Brake Spring, Motor and Pinion Coupling Alignment 14
Limit Switch Wiring Diagram 15
Limit Switch Wiring Diagram, 6415 & 7415 Series AC Actuator 15
Limit Switch Assembly 15

GENERAL INFORMATION

1-1. GENERAL

This manual provides instructions for the installation,
operation and maintenance of the Duff-Norton 6415 &
7415 Series AC actuator. It includes proper procedures
for the disassembly, cleaning, inspection, rebuilding and
assembly of the actuator. To ensure efficient, long,
satisfactory use of this unit, these instructions should be
followed closely.

1-2. INDUSTRIAL USE ONLY

The actuators described 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
Company which authorizes this actuator unit, as used in
your application, as suitable for moving people.

1-3. FACTORY PREPARATION

Each actuator is carefully assembled and tested at the
factory to ensure that the motor and the mechanical
components will function properly and that the actuator
will lift its rated load.

The brake is preset at the factory and no further
adjustment is required. With proper maintenance, this
brake prevents the actuator from self-lowering.
The actuator is pre-lubricated at the factory and thus
requires minimum maintenance.
Limit switches are checked at the factory for proper
functioning.

External wires are provided for customer
hookup. Wires are color coded as to direction of travel of
the actuator (see wiring diagram, Figure 6.2).

1-4. SPECIFICATIONS
TABLE 1-4.

SECTION 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 and 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 their 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 MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE.

If you have any questions concerning warranty
repair, please contact the Duff-Norton Company.

Authorization for return must be received from
the Duff-Norton Company before returning any
equipment for inspection or warranty repair.

Speed

(in/min)

Applied Standard Standard Standard Standard

Load 115 Volt 220 Volt 115 Volt 220 Volt
(lbs.) Motor Motor Motor Motor

(60 Hz) (50 Hz) (60 Hz) (50 Hz)

500 52 44 5.00 1.70
1000 51 42 5.50 1.70
1500 50 41 6.20 2.00

Amps

3

FIGURE 1-6. DIMENSIONS AND SPECIFICATIONS

WARNING:

1. Some actuator external surface temperatures may reach 230°F at or near
maximum allowable duty cycle.

2. Do not operate actuator before setting limit switches.

3. Position hooded vent to prevent moisture and dirt from entering actuator
(see instruction and maintenance sheet).

4. The actuator is not recommended for use in applications where it can be
jammed. Examples of jamming include overtraveling the limit switches and
jamming the nut and screw internally at the extreme ends of the stroke, or
driving the actuator against an immovable object and thus overloading the
actuator severely. Therefore consult Duff-Norton Engineering if jamming is
expected.

4

INSTALLATION

2-1. INSTALLATION PROCEDURES

Use Figure 6-2 as a guide to properly attach the SPA
6415 & 7415 AC actuator to your power source.

2-2. LIMIT SWITCH ADJUSTMENT

CAUTION

Disconnect power before making any adjustments to the
limit switches.

IMPORTANT

Before attempting to set limit switch nuts by these
instructions, be certain that the red and blue motor leads
and the switch leads are connected properly per Figure
6-2. Unless leads are connected exactly as shown, the
following steps will be meaningless.

1.Setting Retracted Position
A. Do not install actuator in the intended
application at this time.
B. With nut retainer “A” installed in actuator
and the translating tube unstrained, operate
actuator toward retracted position until limit
switch nut “B” trips limit switch (see Figure 6-3).

NOTE

Translating tube may jam and rotate prior to tripping limit
switch.

SECTION II

extended centerline to centerline dimension
listed in Figure 1-6.
B. Remove nut restrainer “A” and rotate limit
switch nut “C” (see Figure 6-3) until it activates
the limit switch.
C. Replace nut restrainer “A”.
D. Install actuator in application and check the
unit's drift. Slight readjustment in switch
actuation may be attained by removing nut
restrainer “A” and (1) rotating limit switch nut
“B” to adjust retracted position or (2) rotating
limit switch nut “C” to adjust extended position
(1 notch of rotation = .05 in. of screw travel).
E. After adjusting limit switch nuts,
replace nut restrainer “A”. Operate the actuator
and readjust limit switch nuts as necessary to
achieve desired travel.

2-3. POST-INSTALLATION PROCEDURES

After actuator installation, position the air vent to prevent
moisture and dirt from entering the actuator. Vent can be
repositioned by loosening the set screw and rotating the
outer air tube into which the air vent is threaded. Spot drill
and re-tighten set screw.

If necessary, an elbow (1/8" female x 1/8" male

pipe thread) can be used for more effective positioning.

C. Rotate the translating tube by hand until
distance between the housing clevis hole
centerline and the translating tube clevis hole
centerline equals the desired closed height. This
centerline to centerline dimension is not to be
less than the retracted centerline to centerline
dimension listed in Figure 1-6. If the two clevis
end holes are not oriented as required, rotate the
translating tube no more than 1/2 turn in either
direction until they are properly oriented.
D. Install actuator in application and check drift.
Slight readjustment in switch actuation may be
attained by removing nut restrainer “A” and
rotating limit switch nut “B” (1 notch of
rotation = .05 in. of screw travel). Replace nut
restrainer, “A”.

2. Setting Extended Position
A.Restrain the translating tube against rotation
by hand. Operate the actuator, toward the
extended position, until the distance between
the housing clevis hole centerline and the
translating tube clevis hole centerline equals the
desired extended height. This centerline to
centerline dimension is not to exceed the

FOR UNITS WITH POTENTIOMETER

2-4. POTENTIOMETER INSTALLATION

1. Loosen pot locknut and remove from actuator.

2. For best accessibility, solder leads to pot at this time.

3. Limit switches should be set for extreme limits of travel
per instructions. Limit switch cam adjustments should be
made per paragraph 2 prior to potentiometer installation.

CAUTION

DO NOT ENGAGE POTENTIOMETER SHAFT GEAR
TEETH WITH PLASTIC WORM BEFORE READING
THE FOLLOWING PROCEDURE. F
ADHERE TO THE FOLLOWING PROCEDURE
COULD CAUSE DAMAGE TO THE
POTENTIOMETER.

4. Retract actuator translating tube until stopped by limit
switch.

5. a.

FOR TRAVELS UP TO 9

i. Turn pot shaft counterclockwise until
resistance between terminal SSand

CCCCWW

will be the pot’s full retracted position.

is approximately 100 ohms. This

””

(SINGLE TURN POT):

AILURE TO

5