Boston Gear • 800-825-6544
P-3003-BG
9
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.
Table 8 - Type “C” Misalignment
Size
Maximum Allowable Misalignment
Parallel
Angular
1
.012”
.074”
2
.015”
.091”
3
.016”
.102”
4
.027”
.159”
5
.031”
.183”
6
.045”
.231”
6. Angular Alignment
a. Measure the gap around the periphery between
the coupling flange and the clutch housing
without rotating the shafts. (See 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.
c. If a correction is required to satisfy angular
alignment requirements, then recheck the
parallel alignment.
D. Mounting the “N” Index Coupling and Type
“R” Rigid Coupling
1. After the clutch has been mounted on its shaft
as explained in Section lll, inspect mating pilots
of clutch and coupling for any nicks or burrs and
remove any that are present.
2. Inspect coupling shaft and key for any nicks or burrs
and remove any that are present.
3. In the case of a Type “R” make sure that the
coupling shaft keyway is in alignment with the clutch
shaft keyway. Position the shaft key and slide the
coupling flange onto the shaft.
4. Slide the coupling onto the clutch housing making
sure that the coupling pilot fits into the housing pilot
and that the mounting holes are aligned. In the case
of a Type “N” index coupling, make sure that the
desired mounting slots are aligned with the clutch
housing mounting holes.
5. Secure the coupling to the drive shaft by tightening
the two setscrews located in the hub of the flange.
Refer to Table 7 for recommended setscrew seating
torques.
6. 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. The shafts must be aligned until no offset exists
or is equal at all points around the periphery.
