Wrench keeps tight control of taxi torque
A
Crane Electronics product story
Edited by the Engineeringtalk editorial team
Dec 13, 2004
All the threaded fasteners used in the latest London "black cab" are inspected using Crane's ProWrench Audit - a digital inspection wrench with an easy-to-read display.
LTI is the UK's premier manufacturer of purpose built taxis and recognised as providing the universally known "black cabs".
The company prides itself on the robust design of its hand-built vehicles which are renowned for longevity and the ability to cover hundreds of thousands of miles in a lifetime.
The vehicles produced undergo a very intensive quality control regime and complete audit checks as part of its procedures.
This includes heavy reliance on torque control products supplied by Crane Electronics.
Launched in 2002, the latest model is the TXII.
All threaded fasteners employed on the taxi, including those used in the suspension, axles, steering and wheel hubs as well as those in the interior including seat anchorages and seat belts are initially torqued with conventional click type wrenches.
All fastenings are then inspected in a defined sequence with Crane's ProWrench Audit - a digital inspection wrench with an easy to read display.
LTI's two main criteria for choosing the ProWrench Audit were ease of use and traceability.
As it is designed to be point-of-load-insensitive and the angle can be preset, LTI can be assured of correct measurement however the wrench is held and how much force individual operators are applying to the wrench.
The reported value - showing high/OK/low indications - is independent of the actual movement of the wrench Furthermore, two hundred readings with date and time stamp can be stored by the ProWrench Audit.
With the help of a PC cable, LTI downloads the data from the ProWrench Audit to a PC where they are copied into the company's quality control database.
"The ProWrench Audit is a very good tool that works well and gives very accurate readings", says Ron Wilkins, Production Engineer at LTI.
LTI has selected Crane Electronics' products above all other suppliers for this critical work and as the market for their vehicles expands, there will be increasing reliance on the versatile and high quality torque control solutions and support services that Crane Electronics is able to provide.
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