TM 9-4940-444-14&P
ABRASIVE-TIGHT, RIGID DOOR The easily
ENDLESS APRON CONVEYOR BELT PROVIDES
COMPLETE WORK EXPOSURE
operated counterbalanced door is of rigid construction to
prevent damage and excessive maintenance from
The endless apron conveyor can be provided either as a
tumbling work hitting the door. Lined with rubber to
series of perforated flights made of special abrasion-
protect it from abrasive wear. An automatic lock sets
resisting steel or as a molded rubber endless belt. Sup-
when the door is closed and must be unlocked manually
porting rolls mounted under the rubber belt permit
before the door can be raised. A limit switch, operated
handling heavier loads without belt deflection (not re-
from a cam on the door operating shaft, prevents running
quired for Plastic Deflashers). Easily accessible con-
the wheel when the door is open or reversing the mill
veyor takeups permit ready and simple adjustment of the
when the door is closed.
belt.
ABRASIVE SEPARATOR
LINK ASSEMBLY IS COMPLETELY PROTECTED A
The 18"abrasive separator employs the natural angle of
series of malleable links, with hardened steel bushings,
abrasive repose to provide positive flow control-insuring
pins and rollers, hold together the steel conveyor apron
an even flow across the entire separator lip, irrespective
flights. This assembly is protected from the abrasive
of the degree of abrasive contamination. The uniform,
blast by the barrel heads.
low velocity curtain permits a thorough "air washing" of
the abrasive. Wear is negligible because abrasive
CONVEYOR MAIN DRIVE WITH OVERLOAD
moves on abrasive not the separator parts.
PROTECTION The conveyor drive consists of an
electrical motor with "V" belt drive to a worm gear re-
ABRASIVE ELEVATOR HAS ADJUSTABLE TENSION
ducer, and a chain drive from the reducer to the upper,
The bucket type abrasive elevator is mounted
rear conveyor shaft. The mill and drive are protected
from excessive overloads by means of a positive limit
between the conveyor and the rear wall of the Tumblast.
switch on the mill drive. The low conveyor speed pro-
Tension on the belt is adjusted with a single screw which
vides a gentle yet complete tumbling action without
assures both bearings being adjusted equally. This
danger to the work or machine parts.
screw can be swiveled to correct for misalinement.
ABRASIVE SCREEN REMOVES COARSE MATERIAL
Spent abrasive from the apron conveyor drops into
HEADS
AND
BEARINGS
PROTECTED
BY
REMOVABLE WEAR PLATES Barrel heads are
the hopper through a stationary, removable wire screen
made of heavy steel protected by removable wearing
pan which retains refuse, large pieces of scale, and other
plates. They are supported by heavy-duty roller and ball
foreign material. The hopper serves as the boot of the
bearings mounted in dust-tight housings.
bucket elevator.
AIR OPERATED ABRASIVE CONTROLS Abrasive
CONVEYOR
SHAFTS
AND
SPROCKETS
DESIGNED FOR HEAVY LOADS The conveyor
controls are power-operated by an air cylinder. In
addition to insuring proper abrasive feed to the wheel,
sprockets are mounted on heavy-duty shafting. The
this improvement makes possible a semi-automation
pulleys which support and guide the conveyor on the
option.
rubber belt machines are grooved to prevent abrasive
buildup between the pulley and conveyor.
NEVERLUBE (SEALED FOR LIFE) BEARINGS ARE
INSTALLED WHERE PRACTICAL Eliminates the risk
RUGGED
CABINET
FOR
DURABILITY
AND
ECONOMY Side frames are reinforced heavy steel
of short life due to lack of lubrication or over-lubrication
- also eliminates pushout seals and messy
accumulations of grease and dust.
abrasive and dust, are used on all load-carrying shafts.
In- section doors provide access to all interior working
parts.
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