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Industrial Clutch Products
MODEL CBH
Hydraulically Actuated
Combination Clutch-Brakes
I N D U S T R I A L C L U T C H P R O D U C T S 68
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Model CBH
HYDRAULICALLY ACTUATED COMBINATION CLUTCH BRAKES
PERFORMANCE CHARACTERISTICS
The Model CBH combination clutch-bakes are oil immersed
units with a spring-set brake and hydraulically-set clutch.
hey are designed for extremely high cyclic rates for for
T
those applications that require a high degree of stopping
accuracy.
Hydraulic actuation and precise control of piston stroke
contributes to an extremely fast response time. Actuation
volumes are very small and the fluid’s virtually
incompressible characteristics means that piston motion
times can be as low as 5-10 milliseconds. This, in turn,
allows for more shaft motion time since the unit’s hydraulic
response time is so short. Cyclic rates in excess of 300 cpm
are not uncommon in some applications.
Such high cyclic rates induce a large amount of shock into
the mechanical components of the unit and all members are
designed to withstand these loads. Oil films help dampen
these shock loads and the units run extremely quiet. Noise
reduction s of 25-30 dBA are common when compared to
dry units running at the same speeds and loads.
Wear characteristics of the Model CBH units are excellent.
As an example, a Model CBH unit was endurance tested for
120 million cycles with no appreciable lining or mechanical
wear. A dry unit was tested at the same load level and found
to require re-line every 10 million cycles and complete unit
replacement every 30 million cycles. There are many
industrial applications which require longevities of this
magnitude and the Model CBH has exhibited outstanding
performance in these instances.
ADVANTAGES
Combination clutch-brake eliminates the
possibillity of clutch-brake fight
Hydraulic actuation for fastest possible
response time
Impervious to adverse operating
environments
Wear virtually non-existent
Capable of high cyclic rates
Extreme stopping accuracy
Quiet operation
Usages
Original Equipment
Machinery which cycle frequently and requires the ultimate
performance with respect to life, reliability, and accuracy.
Conversions
Machinery which is being upgraded to increase production
or reliability.
69 I N D U S T R I A L C L U T C H P R O D U C T S
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Model CBH
Strippit® Model 1250M
30 metric ton turret punch press uses a
Model CBH-4010 clutch-brake
Photo courtesy of Strippit, Inc., a unit of Idex Corp.
MODEL CBH COMBINATION CLUTCH-BRAKE
DESCRIPTION
The Model CBH combination clutch-brake is arranged so it
may be mounted in an end of shaft configuration. The unit is
a self-contained, oil cooled, hydraulically actuated
combination clutch-brake designed for maximum capacity
in a minimum space envelope.
The unit contains a spring-set, hydraulically released brake
while the clutch is hydraulically-set and spring released. The
clutch-brake action is effected using a shuttling piston
actuator which moves axially to engage either the clutch or
brake. With this arrangement, it is not possible to engage
the clutch and brake simultaneously so the possibility of
clutch or brake overlap does not exist.
The Model CBH unit uses only the best quality, time proven
materials within its construction and has been designed to
withstand the rigors of high cyclic applications with precision
machined clearances to provide the fastest possible
response.
The input flywheel, gear, or sheave is bolted to the clutch
driving member. The clutch-brake’s inner or driven members
can be keyed or splined to the machine’s output shaft for
maximum driving torque capacity and ease of assembly.
The stationary brake member is affixed to the machine
frame through the use of a brake mounting plate provided by
others.
The stationary housing provides a sealed cavity for the oil
that cools the clutch-brake disc packs. If external cooling is
required, this housing provides a means of oil entry and exit.
The cylinder/piston actuating mechanism has been
integrated within the brake hub thereby eliminating the need
for cross-drilling actuation oil entry holes in the user’s shaft
and the possibility of leakage at the hub/shaft interface.
The Model CBH combination clutch-brake is available with
high-cyclic rate actuation valve assemblies as well as
combination cooling/actuation hydraulic power units.
I N D U S T R I A L C L U T C H P R O D U C T S 70
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Model CBH
1.72
L
D
C
3
.41K
G
E
F
DIA.
B.C.
2.81
MAX.
DIA.
PILOT
O. DIA.
H
I
J
A
DIA.
PILOT
B
DIA.
B.C.
1/2" N.P.T. COOLING
O
IL INLETS (OPTIONAL)
3/8" N.P.T.
ACTUATION INLET
1 1/4" N.P.T.
RETURN PORT
M
1/2" N.P.T.
COOLING
OIL INLET
1/4" N.P.T.
DRAIN
1/4" N.P.T. DRAINS
N
HYDRAULICALLY ACTUATED COMBINATION CLUTCH/BRAKE
DIMENSIONAL DATA All dimensions in inches
CBH
Model ABCDEFGHIJKLMN
3010 16.498 15.25 4.00 2.938 13.75 12.88 12.249 12.71 7.79 0.75 0.63 4.38 (8) .53 (8) .42
4010 16.498 15.25 4.00 2.938 13.75 12.88 12.249 12.71 7.79 0.75 0.63 4.38 (8) .53 (8) .42
5010 16.498 15.25 4.00 2.938 13.75 12.88 12.249 13.00 8.08 0.75 0.63 4.67 (8) .53 (8) .42
5012 16.498 15.25 4.00 2.938 13.75 12.88 12.249 13.32 8.40 0.75 0.63 4.67 (8) .53 (8) .42
6012 16.498 15.25 4.50 3.500 15.88 15.00 14.374 12.56 7.52 0.75 0.63 4.11 (8) .53 (8) .42
7015 16.498 15.25 4.50 3.500 15.88 15.00 14.374 13.20 8.16 0.75 0.63 4.11 (8) .53 (8) .42
8015 16.498 15.25 4.50 3.500 15.88 15.00 14.374 13.52 8.48 0.75 0.63 4.43 (8) .53 (8) .42
9020 16.498 15.25 4.50 3.500 15.88 15.00 14.374 14.16 9.12 0.75 0.63 4.75 (8) .53 (8) .42
NOTES: 1.) Use certified drawing dimensions only for final layouts.
2.) DXF and IGES files available upon request.
OPERATIONAL DATA
CBH Torque Torque Volume Outer Inner Stationary Total Outer Inner Speed
Model (lb.-in.) (lb.-in.) (in.2) (lbs.) (lbs.) (lbs.) (lbs.) (lb.-ft.2) (lb.-ft.2) (RPM)
3010 30,000 10,000 0.75 44.0 63.1 74.9 182 7.06 3.35 800
4010 40,000 10,000 0.75 46.0 69.1 74.9 190 7.24 3.64 800
5010 50,000 10,000 0.75 47.0 72.0 74.9 194 7.33 4.03 800
5012 50,000 12,000 0.75 47.0 75.1 75.9 198 7.33 4.17 800
6012 60,000 12,000 1.13 69.0 87.0 106.8 263 15.52 5.85 675
7015 70,000 15,000 1.13 70.3 95.4 106.8 273 15.80 6.40 675
8015 80,000 15,000 1.13 71.6 99.6 106.8 278 16.10 6.70 675
9020 90,000 20,000 1.13 72.9 108.3 108.1 289 16.30 7.30 675
NOTES: 1.) Operating pressure: 900 PSIG
2.) Torque capacities can be modified. Consult engineering.
3.) Dimensions subject to change without notice.
4.) All threaded fasteners are metric
Clutch Brake Actuation Weight Weight Weight Weight WR2- WR2- Maximum
71 I N D U S T R I A L C L U T C H P R O D U C T S
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TURRET PUNCH PRESS APPLICATION
Turret punch presses are one example of where the Model CBH
combination clutch-brakes have been successfully applied on
both original equipment as well as conversion replacement for dry
clutch and brakes on existing machines.
Turret punch presses are ideal candidates for the operating
features the Model CBH units can offer.
Longevity
Reliability
Quiet Operation
Stopping Accuracy
Repeatable Operation
Greatly Reduced Maintenance
Increased Machine Productivity
Eliminates Wear Particles
Eliminates Air Lubricator Mist
Eliminates Air Supply Requirements
Industrial Clutch Products has been building clutches and brakes
for turret punch presses for over 30 years and can state without
reservation that the Model CBH combinations clutch-brake
provides the user of this equipment an extremely high degree of
reliability and longevity.
Conversion Kit
Model CBH
Clutch-Brake
Actuation
Valving
CONVERSIONS
The Model CBH is ideally suited for conversion of older turret
punch presses to state-of-the-art oil immersed clutch-brakes.
Virtually all of the turret punch presses in the field today can be
converted within a minimal timeframe and budget. Paybacks are
rapid and in most older installations the machine productivity can
be increased by over 50%.
The process involves obtaining a conversion kit provided by
Industrial Clutch Products (see photos). The existing clutch-brake
or separate clutch and brake is removed and a mounting bracket
is fabricated to attach the Model CBH to the press frame.
Crankshaft mounting diameters and flywheel mounting bolt circles
are preserved in the majority of cases as the Model CBH can be
modified to mount directly to, or through the use of an adapter,
directly to these surfaces. All former clutch and brake air
equipment is stripped from the press frame as it is no longer
required.The valve assembly is mounted and hoses and power
are run to the hydraulic power unit. The control is modified to
provide a single valve signal for both the clutch and brake function. The unit is then ready for operation. (Refer to schematic-next
page.)
Industrial Clutch Products will be pleased to provide conversion
assistance to ensure a successful installation.
Hydraulic
Power Unit
I N D U S T R I A L C L U T C H P R O D U C T S 72
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Model CBH
CNC CONTROL
PUNCHING HEAD
HYDRAULIC
POWER
UNIT
24VDC VALVE SIGNAL
MONITORS
POWER TO HPU
TDC MONITOR
BRAKE ON SIGNAL
CAM
MOUNTING BRACKET
MODEL CBH
CLUTCH-BRAKE
VALVE ASSEMBLY
SEAL DRAINS
RETURN OIL
ACTUATION OIL
COOLING OIL
TYPICAL TURRET PUNCH PRESS INSTALLATION
73 I N D U S T R I A L C L U T C H P R O D U C T S
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