Adjustable Spanners

July 13, 2010

Design Faults

Filed under: Design — admin @ 9:50 am

When you collect adjustables you soon see some damage and wear, the severity varies somewhat.
In many respects is due to the design of the tool in question.
An example is the Mauser quick adjust spanner where the worm is held into mesh by a spring, that part of the design is ok but the fatal flaw is the turning moment applied from the force when the tool is used, this pulls the worm out of mesh and in the extreme it will come out of mesh or break the edges from the worm or rack, the example I have shows damage to the worm and only hand pressure on the jaw shows the worm coming out of mesh, the tool shows little wear as is to be expected with a tool that comes out of mesh and slips.

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