8
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P-3002-BG
6. Angular Alignment
a. Measure the gap around the periphery
between the coupling flange and the clutch
housing without rotating the shafts. (See
Figure 12)
b. If the difference between any two points
180 degrees apart exceeds the maximum
angular misalignment shown in Table 9, 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 as explained
in Section III, 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 “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 “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 8 for recommended
coupling setscrew seating torques.
6. Parallel Alignment
a. Place a straightedge across the clutch
housing and coupling flange as shown in
Figure 11.
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.
7. Angular Alignment
a. Measure the gap around the peripery
between the coupling flange and clutch
housing without rotating the shafts. (See
Figure 12)
b. The shafts must be aligned until no gap
exists or is equal at all points around the
periphery.
c. If a correction is required to satisfy angular
alignment requirements, then recheck the
parallel alignment.
1
2
3
4
5
OFFSET
Straightedge
Feeler Gage
Figure 12
Size
Maximum Allowable Misalignment
Parallel
Angular
1
.012”
.074”
2
.015”
.091”
3
.016”
.102”
4
.027”
.159”
5
.031”
.183”
Table 9 - Type “C” Misalignment
Figure 11
