DE-STA-CO FC, FC-SD, C-SD User Manual
®
The Driving Force in Automation
OVERLOAD CLUTCHES
FOR INDEX DRIVES
“WARNING”
This is a controlled document. It is your responsibility to deliver this information to the end user of the CAMCO indexer.
Failure to deliver this, could result in your liability for injury to the user or damage to the machine.
For copies of this manual call your Customer Service Representative 800/645-5207.
“WARNING”
INSTALLATION, OPERATION AND
MAINTENANCE INSTRUCTIONS
SAFETY INSTRUCTIONS
1. Read your Overload Clutch InstallationOperation Instructions thoroughly before
operating the unit, for your safety and the
protection of your unit.
2. CAMCO Overload Clutches are designed to
protect the Index Drive only and will not
protect against bodily injury.
3. Double check to be sure the power is off
and cannot be turned on while working on
the equipment.
4. Use extreme caution with jammed or unbalanced loads, which when cleared may set
the machine in motion.
5. Keep all objects such as hands, clothing,
tools away from rotating or moving parts.
6. Use safety glasses or equivalent to protect
your eyes.
Fig.1
SWITCH NORMALLY
CLOSED
DETECTOR
PLATE
7. Dowel pins and mounting screws must not
protrude from the drive plate or driven
member as the clutch could become a solid
coupling.
8. High humidity, contaminants, or wash down
applications may cause rust within the
clutch, resulting in operational failure.
Lubricate every six months or more frequently as the application requires.
9. The CAMCO clutch is not a "FAIL SAFE"
device and cannot be used on "overhauling"
or "holding" load applications.
The above list includes major safety points to
be observed, but should not be considered as
limiting in safety precautions to be followed.
OPERATING PRINCIPLE
CAMCO Overload Clutches are designed
for mounting on the output member of the
CAMCO Index Drive. An Index Drive is essentially a variable ratio speed reducer. Each index
provides an incremental output to input torque
ratio, which may range from 1:1 in the center of
the motion, to as high as 1000:1 in the beginning or end of the motion. As output torque
equals input torque times the ratio, a clutch
mounted on the input side provides no protection at the beginning or end of the motion.
DRIVING
POSITION,
TYPICAL FOR
EACH PLUNGER
Fig.2
OVERLOAD POSITION,
DETECTOR PLATE IS
MOVED AXIALLY TOW ARD
SWITCH BY TRAVEL OF
PLUNGERS
BODY
DRIVE PLATE
PLUNGER
DRIVE PLATE
SWITCH OPEN
WITHIN 0.008"
DEFLECTION OF
DETECTOR PLATE
PLUNGER
DRIVE PLATE
CAMCO Overload Clutches provide zero
backlash, high rigidity, low inertia and are
specifically designed to be used in conjunction
with CAMCO Index Drives.
Power is transmitted from the Index Drive
through the body of the CAMCO Overload
Clutch. The body contains spring loaded
tapered plungers that engage in mating tapered seats in the drive plate. (See Fig. 1.)
Torque settings are determined by the pressure
the calibrated springs "seat" the plungers.
When an overload occurs, which exceeds the
torque setting of the clutch, the breakaway
friction between the tapered plunger and the
tapered seat, forces the plungers outward from
their seats. The movement of the plungers
elevates the detector plate, actuating the limit
switch. (See Fig. 2.)
The CAMCO Overload Clutch always resets in
its original position, making it an excellent
choice on applications that must remain
registered or timed.
2
CLUTCH TYPES
CAMCO clutches are designed to meet specific application
requirements. They are available in five basic designs.
.39C
2.3C
6.0C
11C
25C
41C
.39FC
2.3FC
6.0FC
11FC
25FC
41FC
.39F
2.3F
6.0F
11F
25F
41F
140F
TYPE C
•Clamped Hub
•Clamped Body
• Shrink Disc
A clutch coupling which can be mounted on Index Drives
without output flanges. They provide a positive, rigid
connection between two shafts.
TYPE FC
•Flange Mounted Body
•Clamped Hub
• Shrink Disc
These clutch couplings flange mount to the ouput shaft
of the Index Drive and provide a keyed-clamped hub
connection to the driven shaft.
TYPE F
LIMIT SWITCH
•Shaft Mounted Body
The type F Clutch flange mounts to
the output shaft of the Index Drive
and provides a mounting surface for a
dial plate, sprocket, gear, etc., resulting in a rigid, compact and accurate
connection to the driven member.
MOUNTING A
DRIVEN MEMBER MAY BE DIAL
PLATE, SPROCKET, GEAR, ETC.
LIMIT SWITCH
LIMIT SWITCH
DRIVEN MEMBER MAY BE DIAL
PLATE, SPROCKET,
GEAR, ETC.
LIMIT
SWITCH
MOUNTING B
.39S
2.3S
6.0S
11S
25S
41S
2.8D
4.0D
7.8D
18D
31D
32D
61D
130D
TYPE S
•Shaft Mounted
•Clamped Body
• Shrink Disc
The combination of a key and clamped
hub construction provides rigid and
backlash-free shaft connections. The
Type S clutch is designed to mount on
MOUNTING A
DRIVEN MEMBER MAY BE DIAL PLATE,
SPROCKET, GEAR, ETC.
LIMIT
SWITCH
Index Drives without flanges.
TYPE D
•Flange Mounted
These units are designed to mount on CAMCO Index
Drives featuring large output mounting surfaces. The dial
plate rests directly on the Index Drive output flange,
providing the ultimate in stability and accuracy.
3
DRIVEN MEMBER MAY BE DIAL PLATE,
SPROCKET, GEAR, ETC.
MOUNTING B
LIMIT SWITCH
INSTALLATION AND REMOVAL
INSTRUCTIONS FOR SHRINK DISCS
Shrink Discs are supplied ready for installation. However, prior to tightening of locking
screws it is necessary to remove wooden
spacers located between outer collars, which
are used during shipment of Shrink Discs.
INSTALLATION
Important: Never tighten locking screws
before shaft installation, since inner ring of
Shrink Discs as well as hub can be permanently contracted even at relatively low
tightening torques.
Outer Collars
Hub
Inner Ring
Metrix Hex Head Locking Screws
DIN 931, Grade 10.9
IMPORTANT!
Carefully Clean
Shaft & Hub Bore
& Keep Free of Any
Lubricant
Shaft
1 Clean hub O.D. and Shrink Disc bore and
lightly lubricate hub O.D. before assembly
of Shrink Disc on hub.
2 Carefully clean shaft and hub bore from
any lubricant prior to mounting hub onto
shaft. THIS STEP IS VERY IMPORTANT,
since it will greatly affect the torque
transmitting capability of a Shrink Disc
connection.
3 After checking correct position of Shrink
Disc and hub, handtighten 3 or 4 equally
spaced locking screws and make sure that
outer collars of Shrink Disc are in a parellel
position. Afterwards handtighten rest of
locking screws.
4 Use torque wrench and equally tighten all
screws one after another in a clock or
counterclockwise sequence by approx.
1/4 turns (even if initially some screws will
require a very low tightening torque) until
specified tightening torque MA is reached.
NOTE: To compensate for bolt setting
during installation, a 5% higher than
specified tightening torque is recommended for final tightening round.
5 Reset torque wrench and make sure that
no screw will turn at specified tightening
torque M
.
A
NOTE: It is not necessary to check tightening
torque again after installation is completed or
equipment has been in operation.
REMOVAL
1. Loosen locking screws in several stages by
using approx. 1/2 turns, following either a
clock or counterclockwise sequence till Shrink
Disc can be moved on hub. DO NOT remove
locking screws completely.
2. Make sure any rust buildup in front of hub
is removed before hub is pulled from shaft.
RE-INSTALLATION OF SHRINK DISC
In relatively clean operating conditions, Shrink
Discs can be re-used without prior cleaning.
Severe conditions, however, require thorough
cleaning and re-lubrication with the following
or similar lubricants:
Tapers of inner rings and outer collar
bores: Molykote 3321 R-spray or
Molykote G RAPlD-spray or paste
Screwthreads and head contact area:
Multipurpose grease like Molykote BR-2
Damaged O-rinqs should be replaced.
LOCKING SCREW-TIGHTENING TORQUES "MA"
screw size M5 M6 M8 M10 M12 M16 M20 M24 M27
s mm 8 10 13 17 19 24 30 36 41
MA [Nm] 5 12 30 59 100 250 490 840 1250
MA [ft.-lbs] 3.6 8.7 22 44 74 185 362 620 922
4
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