Eaton Airflex VC 5000 - Mounting Considerations

23
.
Mounting Spider and Drum Hub
2.3.1
The spider and drum hub are bored for a
press fit onto their respective shafts. The inter-
ference is approximately .0005 in. per inch
(.0005mm/mm) of shaft diameter.
2.3.1 .1
Ensure the shaft is clean and free of nicks or
burrs and check the shaft and bore diameters
for proper fit.
2.3.1.2 Tap the key into the keyway, making sure it
bottoms.
2.3.1.3
Apply a light coat of anti-seizing compound to
the shaft and key.
2.3.1.4
Heat the drum hub or spider uniformly to
25O*F (121*C) to expand the bore.
1
n
! Caution:
It is recommended the drum hub
or spider be heated in oil or an oven;
however, since this is not always
possible, torches may be used. When
using torches, use several with
“rosebud” (broad-flame) tips and keep
them moving to avoid “hot spots”.
Check bore temperature frequently to
avoid overheating.
2.3.1.5 Slide the heated drum hub or spider onto the
shaft until the hub face is flush with the end of
the shaft. Hold in position and allow to cool.
24 .
Shaft Alignment
Note: The text in this section applies to gap-
mounted applications; however, the alignment
tolerances apply to all types of mountings.
Parallel Alignment Tolerance
(Off set):
Not to exceed 0.010 inch (.254mm) Total
Indicator Reading (0.005 in. (.127mm)
maximum offset).
Angular Alignment Tolerance (Gap):
Not to exceed 0.0005 inch per inch
(.0005mm/mm) diameter at which readings
are taken ("D” on Fig. 9).
Note: The alignment procedure described
below has been used successfully on many
VC clutch and brake applications. Other
procedures, of course, may be used; however,
the alignment tolerances are the same regard-
less of the technique used.
Foundations must be set so distance "X”,
shown on Figure 9, is established. If the clutch
is mounted on a shaft having plain bearings,
make sure the shaft is centered within the bear-
ings when establishing the “x” dimension.
Refer to Table 2 for appropriate "X" dimensions.
Note: It is presumed that one of the shafts has
been properly located and anchored.
_*
TABLE 2 - “X” DIMENSIONS (FIG. 9)
SIZE
“X" in.
SIZE
"X" in. SIZE "X" in. SIZE
"X” in.
(mm)
(mm) (mm) (mm)
7
0 Copyright Eaton Corp., 1989. All rights reserved.
VC 5000
Revised: July, 1995 (PDF format)