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IMPORTANT
Helpful
Information and Recommended Procedure for the
CORRECT
ORDERING OF WESTERN BLOCKS
| In
selecting blocks, the governing consideration should be the
load to be handled, rather than diameter or strength of the
rope they will support. In multiple sheave blocks the
load is distributed among several parts of the rope, whereas
the hooks |
or
shackles on the blocks have to support the entire load.
It is not practical to make double blocks twice as strong and
triple blocks three times as strong as single blocks, since
they would be too heavy and needlessly expensive for general
use. |
WHEN
ORDERING, ALWAYS SPECIFY:
Letter
of Fitting, Block Series, Letter of Bearing, and Size.
For
ordering a 4" Single Wood Block with Loose Side Latch
Hook, Common Iron Bearing, simply specify as follows: |
| If
blocks are not shown with type of fitting you require, simply
choose letter corresponding to your fitting need and insert
where “HS” appears in the above example. Unless
otherwise specified all material will be furnished in galvanized
finish.
All
Certified single blocks are proof tested to twice the Resultant
Safe Working Load and marked with a working load equal to
one half the resultant load. Double blocks are tested
to twice the Resultant Safe Working Load and marked with a
working load equal to the resultant load. |
All
blocks except snatch blocks are furnished with becket. Blocks
without becket on special order only. When
blocks are used for heavy loads and fast hoisting, we strongly
recommend roller or bronze bearings in the sheaves. For wire
rope blocks, cast steel sheaves are recommended.
SPECIAL
CUSTOM-MADE BLOCKS. . .
We
manufacture a large number of Special Blocks to meet particular
requirements. Specify type block, diameter of sheave,
diameter of manila or wire rope to be used, and weight of
load. |
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