Wichita Clutch CBA Combination Clutch Brake - Manual (Page 3)

Model CBA Combination
Clutch-Brake Description
Model CBA
The Model CBA combination clutch-brake is arranged so
that it may be mounted in and end of shaft or thru shaft
configuration. The clutch driving members attach to the
flywheel or input power source. The stationary brake
members are attached to the machine frame by the use of a
quill member which also provides a path for moving the
cooling oil into and out of the unit if the application requires
external cooling. Refer to Figure 1 and Figure 2 for a typical
arrangement of an outboard (CBA) and thru-shaft (CBAT)
mount respectively.
The unit may be provided with either pneumatic or hydraulic
actuation chambers as well as a variety of brake springs to
accommodate the clutch and brake torque requirements.
Due to the many types of machinery configurations, it is
often more convenient to house the clutch-brake unit within
a user provided mounting cavity.
The Model CBA contains its own circulating oil-pumping
system which pumps oil through the disc packs from either
direction of rotation anytime the input member rotates. Refer
to Figure 3. If external cooling is required due to the speed
and cyclic rate, the internal pump output is directed from the
outer housing cavity through the quill/brake support member
and external cooler where the engagement heat is removed.
Cooled oil then returns through the quill/brake support
member into the disk pack where engagement heat is
transferred to the oil. This heated oil is then pumped back to
the cooler for heat removal.
If external cooling is not required, the circulating pump
simply moves the oil internally from the outer housing cavity
through the disk packs and back to the housing cavity where
the engagement heat is transferred through the rotating
housing into the surrounding atmosphere.
The ability of the CBA combination clutch-brake to
continuously and effectively transfer large quantities of
energy in this manner is the key factor to its longevity and
reliabililty. In addition, the torque transmitting members,
being lubricated by this same oil, are well suited to carry the
heavy duty industrial type loads these models encounter.
Model CBA
Model CBAT-32580 Combination Clutch-Brake
installed on a PTC 600-ton 144 x 60 transfer press.
Photo courtesy of Press Technology Corp.
I N D U S T R I A L C L U T C H P R O D U C T S 64