3
If the clearance holes in the stepped key align with tapped holes
in the motor shaft, apply Loctite 243 on the M5 socket head
cap screw threads and tighten the screws to 42 lbf-in (5 N-m) to
fasten the stepped key in place.
If the clearance holes do NOT align, do not try to force M5 (or
any other) screws in place.
Slide the key retainer onto the gearbox hollow input shaft. Avoid
lining up the split in the key retainer with the keyway slot on the
gearbox hollow input shaft. Refer to Figure 5.
INSTALL KEY RETAINER
ON THE GEARBOX HOLLOW
INPUT SHAFT AND SLIDE IT ALL
THE WAY TOWRDS THE
GEARBOX
Figure 5 - Install key retainer on the gearbox hollow
shaft. Avoid lining up the split in the key retainer with
the keyway on the hollow shaft
Step 2: Clamp collar installation
Mark the center of the set screw hole on the clamp collar with a
fine tipped marker. This indicates the center of the set screw for
ease of assembly. Continue the center marks down the sides of
the clamp collar as shown in Figure 6.
MARK CENTER OF SET-SCREW
HOLE AND RUN MARKING
ALONG SIDES OF CLAMP
COLLAR
Figure 6 - Mark center of set-screw hole
Both fasteners on the clamp collar should come with pre-
applied threadlocker. If not, apply Loctite 243 to the fastener
threads. Slide the clamp collar onto the gearbox hollow input
shaft and line up the set screw hole on the clamp collar with the
key-slot on the hollow input shaft. The center marks shown in
the above figure will serve as a visual aid for this alignment.
Tighten the clamp screw (socket head screw) on the clamp
collar just enough to keep the clamp collar from rotating
Do NOT completely tighten the clamp screw at this time.
The set screw and clamp screw must be aligned with the
access holes on the gearbox-motor adapter flange for final
tightening.
Figure 7 - Slide the clamp collar on, align set screw
and clamp screw with access holes and tighten
clamp screw slightly to keep clamp from rotating
Step 3: Motor installation onto the gearbox
Remove any oil/grease from the motor shaft and gearbox hollow
input shaft before installing the motor.
Do NOT apply anti-seize to the motor shaft or gearbox hollow
input shaft.
Install the motor onto the gearbox by positioning the motor with
the stepped key aligned with the key slot on the gearbox hollow
input shaft and push it into place. Insert and tighten the motor
mounting screws to 55 ft-lbs (75 N-m).
Step 4: Tighten the set screw on the clamp collar
First, tighten clamp collar set screw to 220 lbf-in (25 N-m). A
screw driver or similar tool can be gently wedged into the motor
fan to prevent the motor shaft from rotating while tightening the
clamp collar screws.
Do not tighten the clamp screw before tightening the set screw.
Step 5: Tighten the clamp screw on the clamp collar
Tighten the clamp screw with a hex socket to 50 ft-lbs (68 N-m).
Use a socket wrench and extension with a short 8-mm hex bit
socket to tighten the clamp screw as shown in Figure 8.
Do NOT use a “T” handle hex wrench. Use a short hex bit
socket.
