NORD Drivesystems U21010 - Manual (Page 3)

7. Driving disc dissassembly and reassembly
The driving disc (Item 489) is attached directly to either the
motor shaft or the shaft of the C-Face Input (Flex-C-Input)
Adapter. One must fi rst remove the driving disc from the
input-side of the NORDISC™ in order to:
• Replace the motor.
• Replace the bearings in the C-Face Adapter.
Driving Disc Removal
A. Separate the driven disc assembly from the driving disc
assembly (See Separate Instructions).
B. Slide the intermediate housing (Item 447) away from
the output housing (Item 402).
C. After removing the input side from the output side,
position the driving disc (Item 489) in the middle of the
housing by turning the speed adjusting hand wheel
(Item
462).
D. Remove the setscrew in the middle of the driving disc
(Item 493). Insert a hardened bolt in the hole that is in
the center of the driving disc (Item 489), and tighten
the bolt against the shaft to separate or remove the
driving disc from the shaft (see table).
Type Setscrew Size Bolt Size
RV10 1/4-20 1/4-20 x 2-1/4 in
RV20 5/16-18 5/16-8 x 2-3/4 in
RV30 1/2-13 1/2-13 x 3 in
RV40 5/8-11 5/8-11 x 4 in
Driving Disc Re-Assembly
A. Installation of the driving disc (Item 489) may require
heating the disc in an oven or on a hot plate, to allow
the disc to be positioned all the way on to the motor
shaft or C-Face Input shaft.
WARNING
Exercise extreme caution when handling the hot driving
disc. Protective gloves are recommended.
B. After heating the disc, position it all the way onto the
shaft until it bottoms.
C. Using the table below, measure the “X” dimension
from the bottom edge of the friction drive housing
(Item 447) to the face of the driving disc (Item 489).
Type Setscrew Size “X” Dimension
RV10 1/4-20 0.837/0.867 in
RV20 5/16-18 0.975/1.005 in
RV30 1/2-13 1.133/1.163 in
RV40 5/8-11 1.311/1.341 in
D. Insert the setscrew (Item 493) into the hole in the center
of the driving disc, and tighten the setscrew snug to the
shaft of the motor or C-Face input assembly. Use a
thread-locking compound to help secure the setscrew.
447
472 (474)
489
493
MEASURING
DEVICE
"X"
DRIVESYSTEMS
NORDISC
™
ADJUSTABLE SPEED DRIVES
RETAIN FOR FUTURE USE U21010 - 3 of 6
www.nord.com/docs 06.09.09
NORD Gear Corporation
Toll Free in the United States: 888.314.6673
NORD Gear Limited
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