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INTRODUCTION

— These instructions are for use when a screw

conveyor 4407JSC 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 J.

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 4407JF 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.

The Falk Corporation, P.O. Box 492, Zip 53201-0492

378-102

3001 W. Canal St., Zip 53208-4200, Milwaukee, WI USA Telephone : 414-342-3131

August 2004

Fax: 414-937-4359 e-mail: [email protected] web: www.falkcorp.com

Supersedes 6-92

a good name in industry

Quadrive Shaft Mounted Drives

•

Appendix L

Sizes 4407/M4407-4608/M4608

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