Page 30 - Goodyear2011PTMaintenanceManual

Synchronous Belts
INSTALLATION GUIDE
30
Taper-Lock Bushing
The following instructions illustrate how to install a sprocket made
with a Taper-Lock hub.
HOW TO INSTALL A SPROCKET MADE
WITH A TAPER-LOCK HUB
Look at the bushing and the hub. Each has a set of half-holes. The
threaded holes in the hub are the mates to the non-threaded holes
in the bushing.
Insert the bushing in the hub and slide it onto the shaft. Align a
threaded hub hole with non-threaded bushing hole.
Start the setscrews into the holes that are threaded in the hub only.
Do not tighten the setscrews yet.
Align both edges of the sprocket with the edges of its mating
sprocket.
Tighten the screws alternately and evenly. This procedure will
wedge the bushing inward and cause it to contract evenly and grip
the shaft.
HOW TO REMOVE A SPROCKET MADE
WITH A TAPER-LOCK HUB
Remove all the setscrews.
Place two of the setscrews in the holes that are threaded in the
bushing only.
Turn the setscrews alternately and evenly. This movement will
unlock the grip and permit easy removal of the assembly with no
shock to the bearings or machinery.
CHECK ALIGNMENT
Drive Alignment
Synchronous belts are very sensitive to misalignment.
The tension carrying member has a high tensile strength and
resistance to elongation, resulting in a very stable belt product.
Any misalignment will lead to inconsistent belt wear, uneven
load distribution and premature tensile failure. In general,
synchronous drives should not be used where misalignment is a
problem. Limit misalignment to 1/4 degree or approximately
1/16" per foot of center distance. With parallel shafts,
misalignment occurs when there is an offset between the
sprocket faces as in Fig A. Misalignment also occurs when the
shafts are not parallel as in Fig B.
IDENTIFY CORRECT BELT
Always select belts to match sprocket profle. Eagle NRG™
belts and sprockets are identifed with a unique Color Spec-
trum System. The seven colors used for identifcation are: Yel-
low, White, Purple, Blue, Green, Orange, and Red. Each color
represents a different size so that Blue belts are made to
operate with Blue sprockets. Make sure to obtain the same color belt
and sprockets. When installing other synchronous belts, use the
correct sprocket width.
Laser Alignment Tool
With our Laser Alignment Tool, you can quickly align drive
components to improve effciency and reduce costly
maintenance. Much easier to use than a straight edge, it
attaches in seconds and when the highly visible sight line lies
within the target openings, the pulley/sprockets are aligned.
Figure A
Figure B 7
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