Specifications

ORC SERIES, MODEL S CLUTCHES
ORC Series, Model S
6
BOSTON GEAR
BOSTON GEAR
®
5. Select the correct hex wrench from Table 5 and
insert it through the hole stamped 22 in the housing.
Tighten the rotor setscrew securing the clutch to the
shaft.
Note:
Turn wrench clockwise only! Do not remove
setscrew from rotor!
Refer to Table 6 for recommended setscrew seating
torques.
6. Remove the hex wrench and replace access screw
in the housing.
C. Mounting Type “C” Flexible Coupling
1. After the clutch has been mounted on its shaft as
explained in Section lll, inspect the coupling shaft
and key for any nicks or burrs and remove any that
are present.
2. Make sure that the coupling shaft keyway is in
alignment with the clutch shaft keyway. Position shaft
key and slide coupling onto the appropriate shaft.
3. Slide the coupling flange onto the coupling studs.
The coupling flange and adapter should be
separated by a gap of 1/8”.
4. Secure the coupling to drive shaft by tightening the
two setscrews located in the hub of the flange. Refer
to Table 7 for recommended coupling setscrew
seating torques.
5. Parallel Alignment
a. Place a straightedge across the clutch housing
and coupling flange as shown in Figure 13.
b. Measure the offset around the periphery of these
two components without rotating the shafts.
c. If the difference in offset from any two points 180
degrees apart exceeds the maximum value
shown in Table 8, the shafts must be realigned.
6. Angular Alignment
a. Measure the gap around the periphery between
the coupling flange and the clutch housing
without rotating the shafts. Refer to Figure 14.
b. If the difference between any two points 180
degrees apart exceeds the maximum angular
misalignment shown in Table 8, the shafts must
be realigned.
TABLE 5 - WRENCH SIZE CHART
Drive Reset Manual
Clutch
Spring Spring Reset
Rotor Access Locking Adjustment
Size
Screw Screw Screw
Setscrew Screws Screw Screw
Hex Square Hex
Hex Hex Hex Hex
Wrench Wrench Wrench
Wrench Wrench Wrench Wrench
1 3/16 3/8 3/16 3/32 1/8 3/32 1/16
2 1/4 3/8 1/4 1/8 5/32 3/32 5/64
3 5/16 1/2 5/16 3/16 3/16 1/8 1/8
4 5/16 1/2 3/8 1/4 5/16 1/8 1/8
5 3/8 1/2 1/2 5/16 5/16 1/8 1/8
6 3/4 3/4 1/2 5/16 5/16 1/8 1/8
TABLE 6 - ROTOR SETSCREW SEATING TORQUES
Size Screw Size Seating Torque
l 10-32 36 in-lb
2 1/4-28 87 in-lb
3 3/8-24 290 in-lb
4 1/2-20 620 in-lb
5 5/8-18 1,325 in-lb
6 5/8-18 1,325 in-lb
TABLE 7- COUPLING SETSCREW SEATING TORQUES
Size Setscrew Size Seating Torque
1 5116-18 165 in-lb
2 3/8-16 290 in-lb
3 3/8-16 290 in-lb
4 1/2-13 620 in-lb
5 1/2-13 620 in-lb
6 1/2-13 620 in-lb
S
traightedge
Coupling Parallel Alignment
Offset
12 3
45
FIGURE 13