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Systems
Model
"E" and Standard Dewatering Screw Features
 Motor
and Drive Assembly
Shaft-Mounted
Gear Box Drive
Shafting
Shaft
and Flights
Adjustable
Screw Shaft
Adjustable
Wear Shoes
External Bearing
Large Heavy-Duty Tub
Three-Side
Overflow
Feed Box and Skirt
Rising Current Belly Pan
 Clean-Out
Drain
Heavy
Duty Skid Frame
Send Us A Sample
MOTOR
AND DRIVE ASSEMBLY
The shaft mounted
gear reduction is totally enclosed within an oil bath gear box. The
reduction is designed with easy service and customer convenience in
mind. By simply changing the drive pulley on the motor, you may increase
or decrease the speed to custom tailor the washing action on your material.
All standard electric motors are 230/460 Volt, 3-phase, 60 cycle. Parts
required for routine maintenance are standard off-the-shelf items and
are easily found in most metropolitan areas nationwide.
SHAFT-MOUNTED
GEAR BOX DRIVE
A greatly improved drive is used on all GreyStone washers. Based on
the use of standard, direct, shaft-mounted speed reducers, the drive
provides several significant advantages.
•
The drive is fully enclosed, with all gears running in a sealed oil
bath.
•
Maintenance is economical since only stock reducers are used.
•
The drive is simplified by reducing the number of shafts, bearings,
and other components.
•
The transmission is highly efficient because of the direct shaft arrangement,
with V-belt drive to electric motor and belt guard.
•
Falk or Dodge shaft-mounted gear reduction drives are used and
are readily available.
SHAFTING
The heavy stub of mirror-smooth, heat-treated shafting is fitted into
a hard stainless steel spacing sleeve. Shaft and sleeve are driven through
a heavy duty rubber gasket that fits snugly between the connecting disc
and tub. A specially designed slinger fits perpendicular to the shaft
between the roller bearing and sleeve and turns with the shaft adding
further protection to the outside mounted bearing from the seal leakage
which may follow extensive use.
SHAFT
AND FLIGHTS
The spiral-type, half pitch steel flights are welded to a heavy tubular
steel shaft. Each spiral screw flight is formed by a special machine
to ensure a uniform spiral. The shaft flanges are precision ground after
they have been welded onto the heavy tubular steel shaft.
ADJUSTABLE
SCREW SHAFT
The adjustable screw shaft makes a unique design. This will allow you
to control the clearance between the belly pan and screw flights...Exclusively
from GreyStone.
ADJUSTABLE
WEAR SHOES
Heavy-duty 1-inch-thick rock-grade rubber wear shoes are used on GreyStone
Washers. These shoes can be adjusted 3/4" for years of additional
service. Rubber will outwear other material at approximately half the
replacement cost.
EXTERNAL
BEARING
GreyStone Sand Dewatering Screws have externally mounted pillow block
bearings that are standard, off-the-shelf components for easy replacement.
LARGE
HEAVY-DUTY TUB
Strong and rigidly constructed screw washers are designed to provide
years of maintenance-free service. GreyStone tubs are all welded construction
and are made of heavy steel plate with angle iron skid frame. GreyStone
machines have a heavy belly pan which is curved to fit tightly to the
screw shaft. During operation, this feature keeps sand from slipping
back and increases your production.
THREE-SIDE
OVERFLOW
GreyStone's large tub gives maximum weir length and maximum sand recovery.
The GreyStone classifier features a three-side overflow flume with adjustable
weirs. Weirs can be set to control the amount of fines to be retained
or rejected. Efficient overflow distribution assures quiet pool area
to prevent fine sand from flushing out with waste water.
FEED
BOX AND SKIRT
The feed box is designed to effectively control the velocity of the
aggregate being introduced into the screw tub. This will reduce turbulence
within the pool area and allow a uniform flow of material.
RISING
CURRENT BELLY PAN
The rising current water enters the pool from the bottom and filters
up, separating fines, dirt and other extraneous matter, which is carried
to the top and forced out with the overflow.
CLEAN-OUT
DRAIN
An easily operated clean-out valve is provided for complete draining
of the reservoir on the lower end of the tub.
HEAVY-DUTY
SKID FRAME
GreyStone standard series washers are equipped with a heavy-duty skid
frame. Pull a GreyStone to where it is needed without using a crane…an
Exclusive GreyStone Feature.
SEND
US A SAMPLE
Send us a sample of your pit run material for a free examination and
recommendation for the best equipment selection to meet your requirements.
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