Specifications
VC 5000 (PDF FORMAT) 13 ©Copyright Eaton Corp., 2010. All rights reserved.
The non-asbestos friction material used in
Airflex VC units may not develop rated torque
initially, as a short “Wear-in” period is
required. It is very important that clutch or
brake operation be monitored closely to pre-
vent excessive heat generation from slippage.
3.1.2 Maximum safe operating speeds are shown on
Table 4.
Do not exceed the operating speeds shown
on Table 4. Operation at speeds greater than
allowable will result in permanent damage to
the clutch element, personal injury or death.
4.0 MAINTENANCE
Only qualified personnel should maintain and
repair these units. Faulty workmanship may
result in personal injury or equipment dam-
age.
When replacing clutch or brake components,
use only genuine, Airflex replacement parts.
4.1 Periodic Inspection
4.1.1 The following items may be inspected without disas-
sembly of the element:
4.1.1.1 Friction Shoe Assembly Lining Wear - Check the
lining thickness and compare to the values shown on
Table 5. If the linings have worn to minimum allowable
thickness or less, they must be replaced as a com-
plete set.
Operation with friction material worn to less
than minimum allowable thickness will result
in damage to the drum.
Note : A wear indicating groove (see Figure 13) is
provided on each end of the friction block. The maxi-
mum wear point, which coincides with the values
shown on Table 5, is at the bottom of the groove.
Figure 13
4.1.1.2 Contamination of Shoes or Drum - Oil or grease
contamination will reduce the developed torque of the
clutch or brake. Disassembly will be required to clean
any oil or grease buildup. In extremely dusty environ-
ments, dust may accumulate in the backing plate cavi-
ties to the point where the friction shoes will not
properly retract. Dust accumulations may be vacu-
umed out of the cavities.
Do not attempt to use a solvent to remove oil
or grease without first removing the element.
While squirting a solvent into an installed
clutch or brake may improve performance
temporarily, a fire hazard exists from the heat
generated during slippage.
TABLE 5
FRICTION MATERIAL THICKNESS
NARROW SERIES
Element Size
Minimum
Allowable Lining
Thickness, inch
(mm)
Original Lining
Thickness, inch
(mm)
11.5VC500 thru
20VC600
0.15 (3.8) 0.33 (8.4)
24VC650 thru
28VC650
0.15 (3.8) 0.45 (11.4)
33VC650 thru
42VC650
0.28 (7.1) 0.58 (14.7)
WIDE SERIES
12VC1000 thru
20VC1000
0.15 (3.8) 0.33 (8.4)
24VC1000 thru
28VC1000
0.15 (3.8) 0.45 (11.4)
32VC1000 thru
42VC1200
0.38 (9.5) 0.58 (14.7)
46VC1200 thru
52VC1200
0.38 (9.5) 0.69 (17.5)
51VC1600 thru
76VC2000
0.30 (7.6) 0.67 (17.0)
Wear
Indicating
Groove