VC
14
©Copyright Eaton Corp., 2019. All rights reserved.
3.0
OPERATION
⚠
WARNING
Exceeding the operating limits described in this
section may result in personal injury or
equipment damage.
3.1
Torque, RPM and Pressure Limits
3.1.1
The developed torque is directly proportional to the
applied air pressure. If the developed torque seems
inadequate, check for oil, grease or dust
contamination.
⚠
CAUTION
Maximum applied air pressure is 125 psig
(8.5bar). Operation at pressures exceeding 125
psig may result in damage to the element.
Consult the factory if operation at pressures
greater than 125 psig is desired
.
⚠
CAUTION
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 prevent
excessive heat generation from slippage.
3.1.2
Maximum safe operating speeds are shown on
Table 4.
⚠
DANGER
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
⚠
WARNING
Only qualified personnel should maintain and
repair these units. Faulty workmanship may
result in personal injury or equipment damage.
⚠
CAUTION
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
disassembly 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 complete set.
⚠
CAUTION
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
maximum wear point, which coincides with the
values shown on Table 5, is at the bottom of the
groove.
Figure 13
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
0.45 (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
0.45 (11.4)
32VC1000 thru
42VC1200
0.38 (9.5)
0.58 (14.7)
32VC1000 thru
42VC1200
0.69 (17.5)
51VC1600 thru
76VC2000
0.30 (7.6)
0.67 (17.0)
