Nexen RPG25A-GE486T 966740 - Manual (Page 16)

FORM NO. L-21235-G-0413 16
DISENGAGING THE ROLLER PINION
1. De-couple the load from the RPS system.
2. Disconnect the power source, ensuring that no torque
is applied to the roller pinion.
3. Remove pinion preload by loosening the preload
mechanism sliding bolts slightly and then turning the
preload application screw(s) to remove the pinion
preload. You should be able to slightly separate the
pinion from the rack teeth now.
There are two pinion mounting styles; shaft mount,
and flange mount. Proceed to the following section
that applies to you.
Shaft Mount Pinion Removal
1. Progressively loosen non-adjacent coupling fasteners
in the same order they were tightened until all are
removed from the coupling (Refer to Figure 12).
2. Insert the coupling fasteners into the threaded holes
in the coupling flange and alternately tighten them as
illustrated in Figure 9 to release the locking action of
the coupling.
3. Lift the servo/reducer/preload mechanism assembly
from the rack or slide the servomotor/reducer out of
the pinion bore.
4. Inspect the shaft, and all coupling components and
replace any that show excessive wear if the pinion will
be reinstalled. Contact Nexen for replacements.
Flange Mount Pinion Removal
1. Remove mounting bolts in an alternating cross pattern.
2. Carefully inspect the mounting bolts and pinion and
flange surfaces for any signs of damage and repair or
replace as necessary if reinstalling.
WARNING
Failure to properly support the load
before disengaging the RPS system
could cause serious harm to operators
or equipment.
RPS SYSTEM OPERATION
DANGER
This product has moving parts that
can crush or cut appendages. Provide
adequate spacing or guarding from any
operating product.
WARNING
Use appropriate guarding for rotating
components. Failure to guard could
result in serious bodily injury.
WARNING
Ensure proper guarding of the product is
used. Nexen recommends the machine builder
design guarding in compliance with OSHA 29
CFR 1910 “Occupational Safety and Health
Hazards”.
WARNING
Never exceed maximum operating speeds
listed for your product. (See Table 7).
TABLE 7
RPS Maximum Speeds*
Product Linear Speed Pinion RPM
RPS10
4 m/s
[13.1 ft/s]
2400
RPS12
8 m/s
[26.3 ft/s]
4000
RPS16
4 m/s
[13.1 ft/s]
1500
RPS20
5 m/s
[16.4 ft/s]
1500
RPS25
8 m/s
[26.2 ft/s]
1920
RPS32
11 m/s
[36.1 ft/s]
1719
RPS40
6 m/s
[19.7 ft/s]
750
RPS4014
6 m/s
[19.7 ft/s]
643
RPS50
6 m/s
[19.7 ft/s]
600
* Standard RPS speed ratings, specials can vary. Review
Nexen specifications for your specific product number.