Duff-Norton SK6420-6 User Manual

Page 4

Applied

Standard

Load

115 Volt

220 Volt

(lbs.)

Motor

(60 Hz)

(50 Hz)

500

600

700

1000

600

675

1500

600

650

2000

600

625

Duty Cycle

(in/hour)

FIGURE 1-6. DIMENSIONS AND SPECIFICATIONS

DUTY CYCLE

* Total inches of travel (up and down) per hour with equally timed
intervals between cycles.
NOTE: The data listed is from our test results. Your data may differ.

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.

DN-SK6420-6-1006 10/10/06 11:40 AM Page 4