Warner Electric SFPBC-500, SFPBC-650 User Manual
SF-500, SF-650, SFC-500,
SFC-650, SFPBC-500, SFPBC-650 Pin
Drive Armature & Spline Drive Armatures
P-202
819-0482
Installation & Operating Instructions
Contents
Installation Instructions
SFC-500 SFC-650 Pin Drive . . . . . . . . . . . . . . . . .3
SFC-500 Spline Drive . . . . . . . . . . . . . . . . . . . . . . .7
SF-500 SF-650 . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
SFPBC-500 Spline Drive . . . . . . . . . . . . . . . . . . .11
SFPBC-500 SFPBC-650 Pin Drive . . . . . . . . . . .14
Torque Tabs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Conduit Box Installation . . . . . . . . . . . . . . . . . . . . .19
Electrical Coil Data . . . . . . . . . . . . . . . . . . . . . . . . .21
Burnishing and Maintenance . . . . . . . . . . . . . . .22-23
Illustration Drawings
SF-500 Bearing Mounted . . . . . . . . . . . . . . . .24-25
SF-650 Flange Mounted . . . . . . . . . . . . . . . . .26-27
SF-650 Bearing Mounted . . . . . . . . . . . . . . . .28-29
SFC-500 Normal Duty Clutch Coupling . . . . .30-31
SFC-500 Heavy Duty Clutch Coupling . . . . . .32-33
SFC-650 Flange Mounted Clutch
Coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34-35
SFC-650 Bearing Mounted Clutch
Coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36-37
SFPBC-500 Normal Duty Clutch/Brake
Coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38-39
SFPBC-500 Heavy Duty Clutch/Brake
Coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40-41
SFPBC-650 Clutch Brake Coupling . . . . . . . .42-43
Bushing Part Numbers . . . . . . . . . . . . . . . . . . . .44-45
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . Back Cover
Failure to follow these
instructions may result in product damage,
equipment damage, and serious or fatal injury to
personnel.
Follow the installation instructions in this manual
care ful ly to ensure safe, reliable operation. All
stated or implied manufacturer warranties are
voided if this product is not installed in accordance
with these instructions.
SF-500 SFC-500 SFPBC-500
Pin Drive
Warner Electric • 800-825-9050 P-202-01 • 819-0482
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SFC-500 SFC-650
Clutch-Coupling Pin Drive Armatures
The illustration drawings, parts lists, and exploded
views for these units can be found on pages 30, 31 and
34 thru 37.
A. Aligning the Shafts
In order for the clutch-coupling unit to operate
properly, the mounting shafts of the motor and
reducer or other hardware must be aligned with respect
to each other before the unit is installed. The two shafts
should be con cen tric with each other within .004 T.I.R.,
and angular alignment should be within 1/2 degree.
(Figure 1)
1. Use a straight-edge to check if the shafts are
aligned with each other. For a more precise
indication of align ment, use a dial indicator.
2. Adjust the position of the motor, reducer, or
other hardware as required to achieve the correct align ment.
3. To be sure the shafts stay in alignment, drill
holes for tapered dowel pins through the
mounting bases of the motor, reducer, or other
hardware and into the mounting surfaces. This
procedure will ensure that, after the clutch-coupling has been installed, the shafts can easily
be placed in proper alignment again by lining
up the holes and secured by inserting the dow el pins.
B. Installing the Conduit Box
Install the conduit box on the field. Instructions for this
procedure are supplied with conduit box.
C. Mounting the Field-and-Rotor Assembly
Either the field-and-rotor assembly or the
armature-and-hub assembly can be installed first,
depending on the char ac ter is tics of each application.
The SFC-500 clutch-couplings are bearing-mounted
units. The SFC-650 units are either bearing-mounted or
flange-mounted.
Figure 1
Bearing Mounted Units
In bearing-mounted units, the field and rotor are
shipped as an assembly. Step 1 applies only to the
SFC-650 units. Steps 2-5 apply to both the SFC-650
and SFC-500.
1. The SFC-650 field and rotor assemblies are
mounted on the shaft with a taperlock bushing.
Insert the bush ing into the ta pered bore, lining
up the clearance holes in the bushing flange
with the tapered holes in the rotor hub.
2. Insert a key into the keyway in the bore of the
rotor and slide the assembly onto the shaft.
3. If the armature has been secured to the shaft
first, then adjust the rotor’s position to allow
ap prox i mate ly 1/32-inch between the two faces.
(Figure 11)
4. Secure the assembly on the shaft by alternately
tight en ing the two screws.
5. A tab or torque arm is provided to prevent the
field from rotating with the shaft. Insert either a
pin in the U-slot or a fork around the torque arm
to prevent this rotation. Under no circumstances, however, should the field be so tightly
restrained that is preloads the bearing. For more
information on torque tabs, see page 18.
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Flange-Mounted Units
Field
Pilot Diameter
Mounting Surface
The fields and rotors are shipped separately for
flange mounted units. On some applications it will be
nec es sary to mount the rotor first, and then bring the
field into position. In other instances the field will be
mounted first, and then the rotor (mounted on a shaft)
will be inserted into place.
In either case, the rotor and field must be
positioned in accordance with the overall axial
dimension from the face of the rotor to the back of
the field flange as shown on the illustration drawings
(dimension “L,” page 34). Hold ing this dimension will
assure the proper axial clearance between the field
and the rotor.
1. Care must be taken in selecting the location
for mount ing the field assembly. Pilot diameters are ma chined on the field mounting flange
to aid in holding the field in the proper position.
2. An appropriate pilot diameter must be
provided on the mounting surface as well.
(Figure 2)
3. The field assembly is then fastened in place
with capscrews and lockwashers. (Figure 3)
Figure 4
4. Once the unit is in place, it must be square
and con cen tric with the shaft in accordance
with the tol er anc es listed on the drawings.
(Figure 4)
Figure 2
5. The rotor is mounted on the shaft with a
taperlock bushing. Insert the bushing
into the tapered bore.
6. Loosely assemble the two locking screws
between the bushing and the rotor.
7. Insert the key into the shaft keyway, and slide
the rotor assembly over the key and on to the
shaft.
8. Adjust the rotor’s position to achieve the overall axial dimension “L” (page 34) when the
bushing is se cured.
9. Secure the assembly in this position by
alternately tightening the two locking screws.
Figure 3
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D. Assembling the Armature and Hub
Drive Pin
Conical
Spring
Retainer
Detent
Spring
Straight
Spring
Armature
Armature
Hub
Armature
Boss
Assemble the armature to the armature hub with the
autogap mounting accessory. The hub is reversible.
The side on which the armature is mounted will
depend on the direction in which the taperlock bushing must enter.
The autogap assembly is a double spring device
which allows for automatic armature clearance and
adjustment for wear. The smaller or conical spring
pushes the ar ma ture from the rotor face, leaving a
gap of about 1/32 inch, while the straight spring automatically follows up for wear. This combination maintains maximum performance ef fi cien cy throughout the
life of the unit.
The assembly procedure for the autogap accessory
is as follows. (Figure 5)
Step 1 Place the straight springs over the armature
bosses on the back side of the armature.
(Figure 6)
Step 2 Place the
armature hub over the
straight springs.
Figure 6
Figure 7
The straight springs must fit into the grooves
in the
armature hub. (Figure 7)
Step 3 Compress the conical springs against the
retainer rings by sliding the detent springs
toward the head of the pins.
(All pins) (Figure 8)
Step 4 Insert the assembled drive pins through the
armature hub and straight springs and into
the threaded armature boss es. Apply grade
Figure 8
Figure 5
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from burrs and chips before assembling.
Armature
1/32 inch Gap
Rotor
290 Loctite Sealant on the drive pin threads.
(Figure 9)
Step 5 Tighten the drive pins until the shoulders of
the pins are against the face of the armature
bosses. Since the threads are a class No. 3
Figure 9
fit, the pins may seem to bind.
Note: Alternately tighten each drive pin a
few turns at a time.
1. Place the bushing into the hub and insert the
key. The key is a side-to-side fit and should
not contact the top of the keyway.
2. Insert the locking setscrews loosely into the
bushing and slide the assembly onto the
shaft.
3. If the field-and-rotor assembly has been
secured to the shaft first, then adjust the
armature’s position to allow approxi-
mately 1/32-inch between the two fac es.
Once this 1/32-inch gap has been set, it will
be au to mat i cal ly maintained throughout the
life of the unit. (Figure 11)
4. Secure the armature’s position on the shaft by
al ter nate ly tightening each setscrew. During
the tight en ing process the bushing should
be tapped lightly to make sure it seats-in
properly.
Step 6 Compress the retainers against the armature
hub and check to see that the armature hub
is held tightly to the armature bosses. Note:
This position must not be dis turbed during
completion of assembly. (Figure 10)
E. Mounting the Armature Assembly
The armature assembly is mounted on the shaft with a
taperlock bushing. All parts must be clean and free
Figure 10
Figure 11
6
Warner Electric • 800-825-9050 P-202-01 • 819-0482
SFC-500 Clutch Coupling Spline Drive
1/32 inch Gap
Rotor
Armature
Armature
D. Assembling the Armature and Hub
The illustration drawing, parts list, and exploded view
for this unit can be found on pages 32-33.
The SFC-500 clutch-couplings are bearing-mounted
units. Either the field-and-rotor assembly or the
ar ma ture-and-hub assembly can be installed first,
depending on the characteristics of each application.
A. Aligning the shafts
Before the clutch coupling can be installed, the
mount ing shafts of the motor and reducer or other
hardware must be aligned to each other. Follow the
instructions provided for the pin drive units on page 3.
B. Installing the Conduit Box
Installed the conduit box on the field assembly.
In struc tions for this procedure can be found on are
supplied with conduit box.
C. Mounting the Field-and-Rotor
Assembly
The clutch-coupling units contain spline drive armatures and hubs. The armatures are shipped with a
built-in autogap spring accessory. This device automatically maintains a gap of about 1/32'' between the
armature and magnet faces for the life of the unit.
(Figure 3)
These units are shipped with the armature and
autogap already assembled. Follow these instructions
to as sem ble the splined armature assembly and hub:
Step 1 Place the splined hub on a flat surface. The
extended portion of the hub, where the set
screw holes are lo cat ed, should be down.
Step 2 Check the detent ring in the armature
assembly to make sure it is centered evenly
around the spline. This ring moves freely,
but it should be centered for easier as sem bly of the hub.
Step 3 Holding the armature with the segmented
side up, press the armature onto the splined
hub. This is most easily done by applying
firm back-and-forth pressure. (Figure 2)
Step 4 Push the assembly up against the retainer
ring.
1. Insert a key into the keyway in the bore of the
rotor, and slide the assembly onto the shaft.
2. If the armature has been secured to the shaft
first, then adjust the rotor’s position to allow
ap prox i mate ly 1/32-inch between the two
faces. (Figure 3)
Figure 3
3. Secure the assembly on the shaft by
alternately tight en ing the two setscrews.
4. A tab or torque arm is provided to prevent the
field from rotating with the shaft. Insert either
a pin in the U-slot or a fork around the torque
arm to prevent this rotation. Under no
circumstances, however, should the field be
so tightly restrained that it preloads the bearing. For more information on torque tabs, see
page 18.
Figure 2
E. Mounting the Armature-Hub Assembly
1. Insert a key in the keyway of the hub and
slide the armature-hub assembly on to the
shaft.
2. If the field-and-rotor assembly has been
se cured to the shaft first, then adjust the
armature’s position to allow a 1/32-
inch gap between the two faces. (Fig ure 3)
3. Secure the armature-hub assembly in this
po si tion by tightening the two setscrews in
the hub.
4. Check the assembly by pressing the armature
into contact with the rotor face and then
releasing it. The armature should spring back
about 1/32''. This gap will be automatically
maintained for the life of the unit.
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SF-500 SF-650 Clutch Pin Drive Armature
The illustration drawings, parts lists, and exploded
views for these units can be found beginning on
pages 24 to 29.
A. Installing the Conduit Box
Install the conduit box on the field assembly.
In struc tions are supplied with conduit box.
B. Mounting the Field-and-Rotor
Assembly
Follow the instructions provided for the SFC-500 and
SFC-650 units, Section C, page 3, for mounting the
field-and-rotor assemblies.
within .006 T.I.R.
2. Once the pulley, gear, etc., has been adapted
to the armature according to the above directions, the ar ma ture may be mounted to it
using the autogap ac ces so ry.
3. The autogap assembly is a double spring
device which allows for automatic armature
clearance and ad just ment for wear. The smaller or conical spring pushes the armature from
the rotor face, leaving a gap of about 1/32
inch, while the straight spring au to mat i cal ly
follows up for wear. This combination maintains maximum per for mance efficiency through out the life of the unit.
Figure 4
C. Assembling the Armature
1. A customer may wish to use the autogap
ac ces so ry to mount a clutch armature to his
own pulley, hub, gear, etc. Follow the illustrated dimensions to prop er ly adapt these parts
to the armature.
a. The chordal dimension must be held for
all chords between pin holes.
b. Sleeve bearings (Oilite Bronze) with an I.D.
of .376 ±.001 must be provided in the
holes of pulley or hub at the chordal and
bolt circle dimensions shown be low.
(Fig ure 5)
c. The drive pins must be square with the
plane of the mounting surface and magnet
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B
.3665 .0005 DIA.
A
1/16
63/64
1-11/32
5/16 - 24 UNF - 3A
Threads
Machining Instructions for Gear, Sprocket, or Pulley
Drive Pin
Conical
Spring
Retainer
Detent
Spring
Straight
Spring
Armature
Armature
Hub
Armature
Boss
AB
SF-500 3.875 ± .001 3.356 ± .001
SF-650 5.125 ± .001 3.624 ± .001
Figure 5
Figure 6
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The assembly procedure for the autogap accessory is
Armature
1/32 inch Gap
Rotor
as follows (see Figure 6):
Step 1 Place straight springs over armature bosses
on back side of armature. (Figure 7)
Figure 7
Step 2 Compress conical spring against retainer
ring by sliding detent spring towards head
of pin. (All pins). (Figure 8)
Step 4 Tighten drive pins until shoulders of pins
are against face of armature bosses. Since
threads are class No. 3 fit, pins may seem
to bind.
Step 5 Compress the retainer rings against the
armature hub (or customer-supplied part),
and check to see that the part is held
tightly to the armature bosses. Note: This
po si tion must not be disturbed during
completion of as sem bly. (Figure 10)
Figure 10
Figure 8
Step 3 Insert assembled drive pins through
armature hub (or customer-supplied part),
through the straight springs, and into the
threaded armature bosses. Apply grade 290
Loctite Sealant on drive pin threads.
(Figure 9)
D. Mounting the Armature Assembly
1. Slide the armature assembly onto the shaft.
2. If the field-and-rotor assembly has been
secured to the shaft or a machine member
first, then adjust the armature’s position to
allow approximately 1/32-inch between the
two faces.
Once this 1/32-inch gap has been set, it will
be au to mat i cal ly maintained throughout the
life of the unit. (Figure 11)
10
Figure 11
Figure 9
3. Secure the assembly in this position on the
shaft.
Warner Electric • 800-825-9050 P-202-01 • 819-0482
SFPBC-500 Spline Drive Armature
Field
Pilot Diameter
Mounting Surface
Clutch/Brake Coupling
C. Mounting the Magnet
This illustration drawing, parts list, and exploded
view for this unit can be found on page 40 and 41.
A. Aligning the Shafts
In order for the clutch-coupling unit to operate
properly, the mounting shafts of the motor and the
reducer or oth er hardware must be aligned with
respect to each other before the unit is installed.
The two shafts should be con cen tric with each
other within 004 T.I.R., and angular align ment
should be within 1/2 degree.
1. Use a straight edge to check if the shafts
are aligned with each other. For a more precise indication of align ment, use a dial indicator.
2. Adjust the position of the motor, reducer, or
other hardware as required to achieve the
correct align ment.
3. To be sure the shafts stay in alignment, drill
holes for tapered dowel pins through the
mounting bases of the motor, reducer, or
other hardware and into the mounting
surfaces. This procedure will ensure that,
after the clutch-coupling has been installed,
the shafts can easily be placed in proper
alignment again by lining up the holes and
secured by inserting the dow el pins.
The brake half of the clutch/brake unit is usually
installed first; however, in some cases it may be necessary to start with the clutch portion of the unit to
assure a proper as sem bly when complete.
The brake magnet is mounted to a stationary machine
member by a flange. Extreme care must be taken in
se lect ing the location for the mounting of the magnet.
Prop er positioning is very important for the unit to
function cor rect ly.
1. A pilot diameter on the mounting surface is
essential to hold the magnet within the
required tolerances. (Figure 2)
Figure 2
2. A machined pilot diameter is provided on the
magnet mounting flange (refer to illustration
drawings page 40) to aid in the proper
positioning of the magnet.
B. Installing the Conduit Boxes
Install a conduit box on the brake magnet and on
the clutch field. Instructions for this procedure are
supplied with a conduit box.
3. Once the mounting surface has been prepared, the magnet is bolted in place with capscrews and lockwashers. (Figure 3)
Figure 3
Figure 1
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4. Use a dial indicator to check the unit for
1/32 inch Gap
Magnet
Armature
con cen tric i ty and squareness to the
shaft. The unit should be concentric within
.010 T.I.R. and square within .006 T.I.R. (Figure
Figure 4
Figure 6
5. Turn the hub over and repeat Steps 3 and 4
with the other armature. (Figure 6)
4)
D. Assembling the Hub and Armatures
The heavy duty units contain spline drive armatures
and hubs. The armatures are shipped with a built-in
autogap spring accessory. This device automatically
maintains a gap of about 1/32'' between the armature
and magnet faces for the life of the unit.
Use the following method to assemble the armature
and splined hub:
1. Place the armature hub up on one end.
2. Check the detent ring in the armature
assembly to make sure it is evenly centered
around the spline. This ring moves freely, and
it should be centered for eas i er assembly of
the hub.
3. Holding one of the armatures with the
E. Mounting the Armature-Hub Assembly
1. Insert a key in the keyway of the hub and
slide the armature-hub assembly on to the
shaft.
Figure 7
2. Position the assembly so that the face of the
ar ma ture is about 1/32-inch from the magnet
face. (Figure 7)
3. Secure the armature-hub assembly in this
position by tightening the two setscrews in
the hub.
4. Check the assembly by pressing the armature
into contact with the magnet face and then
Figure 5
segmented side up, press the armature on to
12
the hub using firm back-and-forth pressure.
(Figure 5)
4. Push the assembly up against the retainer
ring.
Warner Electric • 800-825-9050 P-202-01 • 819-0482
releasing it. The armature should spring back
1/32 inch Gap
Armature
Rotor
about 1/32''. This gap will be automatically
maintained for the life of the unit.
F. Mounting the Field-and-Rotor Assembly
1. Insert a key into the keyway in the bore of the
Figure 8
rotor, and slide the assembly onto the shaft.
2. Adjust the rotor’s position on the shaft to
allow ap prox i mate ly 1/32'' gap between the
faces of the rotor and armature. (Figure 8)
3. Secure the assembly on the shaft by
alternately tight en ing the two setscrews.
4. Set the autogap by pressing the face of the
armature into the rotor face. When the
armature is released, it will spring back about
1/32''. Once this 1/32'' gap is set, it will be
automatically maintained throughout the life of
the unit.
5. A tab or torque arm is provided to prevent the
field from rotating with the shaft. Insert either
a pin in the U-slot or a fork around the torque
arm to prevent this rotation. Under no
circumstances, however, should the field be
so tightly restrained that it preloads the
bearing. For more information on torque tabs,
see page 18.
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SFPBC-500 & SFPBC-650 Clutch/Brake
Field
Pilot Diameter
Mounting Surface
Coupling Normal Duty Pin Drive Armature
The illustration drawings, parts lists, and exploded
views for these units can be found beginning on
pages 38, 39 and 42, 43.
The brake half of the clutch/brake unit is usually
installed first; however, in some cases it may be
necessary to start with the clutch portion of the
unit to assure a proper as sem bly when complete.
A. Aligning the Shafts
Before the clutch/brake coupling can be installed,
the mounting shafts of the motor and reducer or
other hard ware must be aligned to each other.
Follow the
in struc tions provided on page 11 for the spline drive
unit.
B. Installing the Conduit Boxes
Install a conduit box on the brake magnet and on
the clutch field. Instructions are supplied with a conduit box.
prepared, the magnet is bolted in place with
capscrews and lockwashers. (Figure 3)
4. Use a dial indicator to check the unit for
Figure 3
con cen tric i ty and squareness to the shaft.
The unit should be concentric within .010
T.I.R. and square within .006 T.I.R. (Figure 4)
C. Mounting the Magnet
The brake magnet is mounted to a stationary
machine member by a flange. Extreme care must be
taken in se lect ing the location for the mounting of
the magnet. Prop er positioning is very important for
the unit to func tion cor rect ly.
1. A pilot diameter on the mounting surface is
essential to hold the magnet within the
required tolerances. (Figure 2)
Figure 2
2. A machined pilot diameter is provided on the
magnet mounting flange (refer to illustration
drawings page 38 & 42) to aid in the proper
positioning of the mag net.
Figure 4
D. Assembling the Armature and Hub
Assemble the armature to the armature hub with the
autogap mounting accessory.
The autogap assembly is a double spring device
which allows for automatic armature clearance and
adjustment for wear. The smaller or conical spring
pushes the ar ma ture from the rotor face, leaving a
gap of about 1/32 inch, while the straight spring
automatically follows up for wear. This combination
maintains maximum performance ef fi cien cy throughout the life of the unit.
The assembly procedure for the autogap accessory
is as follows. (Figure 5)
3. Once the mounting surface has been
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