378-206
Rexnord
January 2019
3001 W. Canal St., Milwaukee, WI 53208-4200 USA
Supersedes 07-15
Telephone:
414-342-3131
Fax:
414-937-4359
www.rexnord.com
(PN-212395)
Appendix K
•
Falk Quadrive Shaft-Mounted Drives Model A
(Page 46 of 53)
Sizes 5407-5608
Drive Shaft Recommendations Using (TCB) Kit
INTRODUCTION
— These instructions are for use
when a screw conveyor 5407JSC drive is to be used
and the following conditions exist: Falk standard or 316
stainless steel JSC tapered drive shafts can not be used
due to special extension dimensions or materials; or
manufacturing a special tapered drive shaft is not feasible .
Use this appendix to retrofit existing applications or for
outfitting new installations where the above conditions
warrant . For tapered shaft recommendations, see
Appendix H .
This appendix will allow the use of a straight (non tapered)
drive shaft with a special bushing conversion kit on screw
conveyor applications . The bushing conversion kit may also
be used on flange mounted 5407JF applications where
the Falk JSC seal housing is to be used as the mounting
flange . This kit provides one bushing bore per drive size as
shown in Table 4 . Provided in this appendix are dimensions
for drive shaft recommendations and instructions for the
installation and removal of the assembly .
FIGURE 2
— The hollow shaft of the drive has a tapered
bore which accepts the tapered bushing . When the
bushing is drawn into the taper, a clamping force is applied
to the drive shaft . The drive shaft is drawn into the hollow
shaft via a fastener in the thrust plate . The bushing seats
against a shoulder on the drive shaft and is drawn into the
drive with the shaft . Removal is accomplished by using a
jackscrew in the thrust plate and forcing the drive shaft out
of the drive . The retaining ring in the drive shaft assures
that the bushing will be removed along with the shaft .
DRIVE SHAFT RECOMMENDATIONS
— The
recommendations for the drive shaft consist of two major
features . The first is the shoulder which must be provided
in the location shown in Figure 2 . This shoulder provides
the backing necessary to draw the bushing into the taper .
A permanently fixed shoulder must be provided in order
for this design to be effective . The shoulder may be a
welded collar or an integral step . SET COLLARS ARE NOT
ACCEPTABLE . A retaining ring may be used in the drive
shaft, to provide the shoulder, but stress concentrations
can occur at the groove and therefore shaft stresses must
be checked . The second major feature on the shaft is
the retaining ring groove in the shaft end . This feature is
recommended to ensure positive removal of the bushing
when the drive shaft is removed from the drive . The
threaded hole in the end of the drive shaft accepts the
thrust plate fastener .
WARNING
: Lock out power source and remove all external
loads from system before servicing drive or accessories.
INSTALLATION PROCEDURE
— With the shaft
manufactured per the recommendations shown, proceed
as follows:
The seal housing may be assembled to the drive before or
after the drive shaft is installed into the drive, but if the seal
housing is installed to the drive first, the lip type seal (if
used) must be installed from the extension end .
Slide the bushing (large end first) onto the drive shaft
until it contacts the shoulder on the shaft . Insert the key
through the bushing and into the drive shaft keyway . Install
the retaining ring into the groove in the drive shaft . Line
up the keyway in the drive hollow shaft with the key in
the drive shaft and slide shaft/bushing assembly into the
hollow shaft . Attach the seal housing to the drive with the
fasteners provided . Tighten fasteners to torque given in
Table 1 . Assemble the thrust plate and retaining ring into
the counterbore in the hollow shaft . Insert the thrust plate
fastener through the thrust plate and thread into the drive
shaft end . Tighten to the torque given in Table 2 . Install all
covers and guards .
REMOVAL PROCEDURE
— Remove low-speed shaft
input end cover . Remove the thrust plate fastener, retaining
ring and thrust plate from the hollow shaft . Refer to Table 3
and select a backing bolt and flat washer and install them
into the drive shaft as illustrated in Figure 1 . The head of
the backing bolt provides a working surface for the removal
bolt . Reinsert the thrust plate and retaining ring into the
hollow shaft and select a removal bolt from Table 3 . Thread
the removal bolt into the thrust plate until it contacts the
backing bolt head . Tighten the removal bolt to the torque
indicated in Table 3 (If the thrust plate rotates in the shaft,
align the slot in the plate with the hollow shaft keyway
and insert a screwdriver or piece of key stock to prevent
rotation of the plate) . After torquing the bolt, as instructed,
strike the bolt sharply with a hammer and retorque the
bolt if separation of the drive from the shaft did not occur .
Repeat this procedure, retorquing the bolt after each blow,
until separation occurs .
HOLLOW
SHAFT
THRUST
PLATE
RETAINING
RING
FLAT WASHER
TAPPED HOLE
IN DRIVE SHAFT
DRIVE SHAFT
RETAINING
RING
BUSHING
BACKING BOLT
REMOVAL
BOLT
Figure 1
Table 1 — Seal Housing Fastener Tightening
Torque
(Non-Lubricated Fasteners)
Drive
Size
Fastener Size & Grade
Max Tightening Torque
lb-ft (Nm)
5407
.750-10UNC
330 (447)
Table 2 — Thrust Plate Fastener Data
(Non-Lubricated Fasteners)
Drive
size
Fastener Size & Grade
Max Tightening
Torque lb-ft (Nm)
Min Thread Depth
Inches (mm)
5407
1.000-8UNC x 5.50, GR.8
792 (1074)
2.75 (69.8)
