Specifications

ORC SERIES, MODEL S CLUTCHES
5
ORC Series, Model S
BOSTON GEAR
BOSTON GEAR
®
III. LOCATING AND MOUNTING CLUTCH
AND COUPLINGS TO SHAFT
A. Location
The clutch should always be located as close as
possible to the source of an overload condition. Figures
9 through 12 indicate both preferred and not preferred
locations for mounting an ORC Series, Model S
Overload Release Clutch.
Note:
Clutch mounted sprockets, etc. and couplings
should be positioned as close to a supporting
bearing as possible to minimize overhung loads. A
minimum shaft engagement of 1-1/2 times the shaft
diameter is recommended for clutch and coupling
flange installation.
1. Direct Drives
a. Figure 9 shows the preferred location for
mounting in a direct drive application. The clutch
is mounted on the low speed side of the reducer,
and transmits power from its housing, through its
rotor to the driven shaft.
b. Locating the clutch as shown in Figure 10 is not
preferred. Here the clutch is mounted on the
high-speed side of the reducer. Generally,
mounting in this manner requires the clutch to be
hypersensitive to perform satisfactorily.
2. Indirect Drives
a. Either location of the clutch shown in Figure 11 is
preferred in indirect drive applications.
b. The mounting location in Figure 12 is not
preferred for the same reasons as those for
Figure 10. Always consult the factory when a
mounting of this type is necessary.
B. Mounting Basic Clutch
1. Inspect shaft and key for any nicks or burrs and
remove any that may be present.
2. Remove the access screw from the hole stamped 22
outside of the clutch housing. Make sure that the
clutch is engaged where the rotor keyway is in line
with the hole stamped 22.
3. Position shaft key and slide clutch onto shaft.
4. Align sprocket or sheave mounted to clutch with
mating sprocket or sheave in drive train. Refer to
installation and alignment instructions furnished with
sprocket or sheave.
Flexible Coupling
Coupling
Half
Overload Clutch
Motor Reducer
Machine
FIGURE 9
Coupling Half
Overload Clutch
Flexible Coupling
Motor
Reducer Machine
FIGURE 10
Driving
Member
Driven Machinery
Overload Clutch
Location
Driving
Member
FIGURE 11
Overload Clutch
Motor
Reducer
FIGURE 12