
Instructions for Operation & Maintenance
Spin Loader
General Description
The Spin Loader lets you utilize bulk storage facilities to their fullest 
capacity. It eliminates the pyramiding which occurs when powders, 
flakes and granular materials are loaded into bins, hopper cars and 
piles and enables you to load up to 15% more product into virtually 
any storage facility.
Compact, ruggedly-built, the Spin Loader consists of an inlet tube, 
which guides the material through the unit and a spinner, which 
distributes the material in a 360° arc or as refined by deflectors and 
reduces the possibility of particle segregation and enables the particles 
to intermix. The spinner is rotated by the use of a direct coupled 
motor. Since the unit is completely enclosed, it totally eliminates 
product waste, contamination and dust problems. The SL-100 is 
supplied with a 2 horsepower drive and is rated at a maximum feed 
rate of 100,000 pounds per hour. The SL-200 is supplied with a 5 
horsepower drive and is rated at a maximum feed rate of 200,000 
pounds per hour. For models other than these listed, check formal 
quotation for horsepower ratings and maximum rates.
Installation
Except for the paddle of the optional rotary level indicator, the Spin 
Loader is shipped assembled and ready for installation. After the unit 
is unpacked, examine it for any possible shipping damage. Notify 
carrier if any is found.
The paddle of the rotary level indicator is simply screwed into the shaft 
end. A roll pin is inserted through the shaft to lock the paddle in 
place.
The Spin Loader must be rotated at least once a month to insure 
proper bearing grease distribution. If a high temperature or moist 
environment is expected, the unit must be rotated at shorter intervals. 
Please contact the factory for their recommendations.

Examine the nameplate data of the motor to see that it agrees with 
the power circuit to which it is to be connected. Connect the power 
leads or air line to obtain the specified direction of rotation. CORRECT
DIRECTION OR ROTATION IS STAMPED ONTO HOUSING***DO 
NOT OPERATE IN REVERSE DIRECTION. The spinner should rotate
freely when turned by hand. The electric motor should run smoothly 
with little noise. If the motor should fail to start and produces a 
decided hum, shut down immediately and investigate for trouble.
Electrical and Air Requirements
The standard units are provided with either AC motors or air operated 
motors. The electric AC motors are TEFC 900 RPM and operate at 
230/460 volt, 3 phase, 60 hertz. The air motors are 4-vane models 
and are provided with air mufflers. Both the 2 and 5 horsepower 
motors operate at 900 RPM with 100 PSI air. The air consumption of 
the 2 horsepower model will be 80 CFM (free air) with the 5 
horsepower model requiring 150 CFM (free air).
Operation
The Spin Loader is designed to be hoisted by a lifting device. A power 
winch with steel cable, spreader bar and safety hooks of sufficient 
capacity (1/2 ton is recommended) is used to raise and lower the unit 
as needed onto the hatchway or the hopper car. BEFORE THE SPIN
LOADER IS OPERATED, IT MUST BE SECURED TO THE 
HATCHWAY OF THE HOPPER CAR, TRUCK OR BIN BY MEANS OF 
SWING BOLTS, T-BOLTS OR CLAMPS. Start motor BEFORE
material is fed into the Spin Loader. Stop motor when hopper car is 
fully loaded.
WARNING: The Spin Loader is not to be used as a lifting
platform for personnel. Use safe practices at 
all times whenever raising or lowering.
Maintenance
Warning: The electric motor should be electrically locked-out 
before any work is performed. Air supply for air motors must 
be disconnected.

The following should be checked at regular intervals:
1. Inspect the gasket attached to the base of the Spin Loader. 
Replace with new gasket if torn.
2. The Spin Loader’s top and lower bearings are packed with a 
general purpose grease and should not require any additional 
lubrication. Both bearings have an expected bearing life of 1 to 
2 years under normal use. If a bearing fails, it should be 
replaced with a Metalfab spare part or equal.
WHEN INQUIRING ABOUT ANY SPIN LOADER, ALWAYS REFER 
TO THE SERIAL NUMBER STAMPED ON THE METALFAB 
NAMEPLATE.
METALFAB SERVICE
Metalfab, Inc.
Prices Switch Road
P.O. Box 9
Vernon, NJ 07462
Phone (973) 764-2000
Fax (973) 764-0272
Email: metalfab@metalfabinc.com