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to Technical Information Main Page |
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| Foreword |
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In order to fully achieve the service
life potential of Python™ and standard wire rope for demanding crane
jobs, these step by step instructions should be followed. They are intended
to prevent rope damage caused by kinks, untwisting, and loose strands during
handling and installation.
We realize that the 'real world' is not perfect. This applies also to wire
rope installation. It is impossible to cover ALL imaginable installation
situations, location difficulties, and crane set ups. You will also find
that these instructions are not very different from the installation procedure
of 6-strand or 19x7 ropes. Many experienced Riggers may find some of the
following "old hat". If you notice any omissions or have ideas
that we can incorporate into this brochure we will be most appreciative. |
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Measuring
the rope diameter
Before you start anything, make sure the diameter of the new rope you are
about to install is the correct one for your crane.
Remember that most wire ropes measure slightly over their nominal diameter.
Standard rope is allowed to measure up to 5% over their nominal diameter.
Some PYTHON® wire rope is made with a maximum 4% tolerance only.
The rope you are going to replace may be worn and may measure less than
the rope you are about to install.
Keep a record of the
new rope diameter for future references. You will be asked to determine
how much the rope diameter has decreased in service and you MUST know the
ACTUAL diameter of the wire rope after the break in period (click
here for more info).
When measuring the rope, don't measure the layer on the reel. Pull a couple
of feet off the reel and measure the rope when straight. It is advisable
to take 4 measurements of the rope round it's axis and average the results. |
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