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This technical service bulletin applies to: Besser Batching
Equipment, Block Machines, Loading / Unloading Systems and Mixers.
It is extremely important that new or replacement pulleys
are installed and aligned properly. Any pulley types used in industry must
be properly assembled, and bolts or setscrews tightened to the correct
torque.
Most pulleys are attached to the shaft with a tapered
bushing, which fits a mating tapered bore in the pulley. This type of system
consists of a bushing, a pulley and often a setscrew and key. Bushings come
in several diameters. This allows for a reduction in the parts inventory
required in your plant because one bushing can be used with a number of
different size pulleys.
V-Belt drives do not require alignment to as close
tolerances as most other types of drives-but unless the belts enter and
leave the sheaves in a relatively straight line, wear is accelerated.
The two most common causes of misalignment are shown above:
(a) the shafts of the driver and driven machines are not parallel, and (b)
the sheaves are not located properly on the shafts.
To check alignment all you need is a straight-edge, or for
drives with longer centers, a steel tape. If these aren’t available, you
can, as a last resort, even use heavy string. Just line the straight-edge or
tape along the outside face of both sheaves as shown in the illustration.
Misalignment will show up as a gap between the sheave face and
straight-edge, or perhaps as a "break" in the tape or string. Make
sure that the width of the outside land is equal on both sheaves when using
this method. A third cause of misalignment is "tilted" or
improperly mounted sheaves. Sheaves that are already installed can be
checked for "tilt" by using a spirit level.
SAFETY BULLETIN
This notice is issued to advise you that some previously
accepted shop practices may not be keeping up with
changing Federal and State Safety and Health Standards. Your current shop
practices may not emphasize the need for
proper precautions to insure safe operation and use of machines, tools,
automatic loaders and allied equipment
and/or warn against the use of certain solvents or other cleaning substances
that are now considered unsafe or prohibited by
law. Since many shop practices may not reflect current safety
practice and procedures, particularly with regard to the safe operation of
equipment, it is important that you
review your practices to ensure compliance with Federal and State Safety and
Health Standards.
IMPORTANT
The operation of any machine or power-operated device can
be extremely hazardous unless proper safety precautions
are strictly observed. Observe the following safety precautions:
Always be sure proper
guarding is in place for all pinch, catch, shear, crush and nip points.
Always be sure that
all personnel are clear of the equipment before starting it.
Always be sure the
equipment is properly grounded.
Always turn the main
electrical panel off and lock it out in accordance with published lockout/
tagout procedures prior to making adjustments,
repairs, and maintenance.
Always wear
appropriate protective equipment such as safety glasses, safety shoes,
hearing protection and hard hats.
Always keep chemical
and flammable material away from electrical or operating equipment.
Always maintain a
safe work area that is free from slipping and tripping hazards.
Always be sure
appropriate safety devices are used when providing maintenance and repairs
to all equipment.
Never exceed the
rated capacity of a machine or tool.
Never modify
machinery in any way without prior written approval of the Besser
Engineering Department.
Never operate
equipment unless proper maintenance has been regularly performed.
Never operate any
equipment if unusual or excessive noise or vibration occurs.
Never operate any
equipment while any part of the body is in the proximity of potentially
hazardous areas.
Never use any toxic
flammable substance as a solvent cleaner.
Never allow the
operation or repair of equipment by untrained personnel.
Never climb or stand
on equipment when it is in operation.
It is important that you review
Federal and State Safety and Health Standards on a continual basis. All
shop supervisors, maintenance personnel, machine
operators, tool operators, and any other person involved
in the setup, operation, maintenance, repair or adjustment of Besser-built
equipment should read and understand this
bulletin and Federal and State Safety and Health Standards on which this
bulletin is based. |
