Duff-Norton SK-2390-B Panduan Petunjuk Pemasangan, Pengoperasian & Pemeliharaan - Halaman 4
Jelajahi secara online atau unduh pdf Panduan Petunjuk Pemasangan, Pengoperasian & Pemeliharaan untuk Pengontrol Duff-Norton SK-2390-B. Duff-Norton SK-2390-B 8 halaman. 2 ton to 10 ton capacity translating machine screw actuators
Halaman Cetakgear boxes, etc., are coupled together, it should be
possible to turn the main drive shaft by hand. If there
are no signs of binding or misalignment, the actuator
system is then ready for normal operation.
4. Actuators should have a greater raise than is needed
in the actual installation. Should it be necessary to
operate these actuators at the extreme limits of travel,
it should be done cautiously.
Do not allow actuator travel to go beyond catalog
closed height of actuator or serious damage to internal
mechanism may result. Refer to the design guide for
closed height of respective units.
5. The worm shaft speed for these actuators should not exceed
the values specified in Table 1-1 of one-fourth (or less) of the
actuators load rating.
6. The lifting screw should not be permitted to accumulate
dust and grit on the threads. If possible, lifting screws
should be returned to closed position when not in use.
Where lifting screws are not protected from airborne dirt,
dust, etc., bellows boots should be used. Inspect frequent-
ly at regular intervals to be certain that a lubrication film is
present. Lifting screws should never be run dry.
7. When using a 2, 5, or 10 ton actuator, a periodic check
of backlash of the lifting screw thread is recommended
to check wear of the worm gear internal threads.
The normal backlash on a new unit of this type is
approximately .010 inch. Backlash of 50% or more of
the thread thickness indicates the need to replace the
worm gear.
For loads of from 25% to 100% of actuator capacity,
torque requirements are approximately proportioned to
the load.
8. The lubrication procedures for normal and severe
service conditions, as described in Section II, paragraph
2-1, should be closely followed.
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
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
NOTE
NOTE
NOTE
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, 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 Duff-Norton Customer Service. Authorization
for return must be received from the Duff-Norton before
returning any equipment for inspection or warranty repair.
Maintenance
2-1. Lubrication
Unless otherwise specified, actuators are shipped packed
with grease which should be sufficient for one month
of normal operation. For normal operation, the actuator
should be lubricated once a month using Mobile XHP461 or
XHP462 Extreme Pressure grease.
This grease has been thoroughly evaluated in Duff-Norton
actuators and has demonstrated superior lubricating
properties affecting 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
containing molybdenum disulfide should not 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.
Where lifting screws are not protected from airborne, dirt,
dust, etc., bellows boots should be used. Inspect frequent-
ly at regular intervals to be certain that a lubricating film is
present. Lifting screws should never be run dry.
2-2. Rebuild Procedure
Duff-Norton recommends the following procedures for
assembly and disassembly of actuators.
4
Section II
NOTE