Cheese
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- Jan 16, 2015
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smorgasbord said:What do we know about Festool's extrusion process that gives it such high accuracy?
It's all about properly vetting their suppliers and deploying their in-house QA group.
Number one is that Festool Corporate found an European extruder that is capable of manufacturing extrusions to their specifications and number two, is they are tireless in culling out the discrepant parts. It's not enough to just have a competent manufacturer, you also have to perform your do-diligence on QA to ensure that discrepant parts don't fall through the cracks.
Remember, a few years ago Festool USA tried to bring some of the extrusion production to the states, they even set up a dedicated group in Indiana to perform the rail manufacturing, but after several years, and as the mountain of extrusion rejects out numbered the mole hill of extrusion acceptables, Festool USA just called it quits. They may fire it back up again as I feel there is still a viable market out there besides guide rails. But it was certainly an eye opening experience in that things that seem simple ...may not be so simple.
There's a specification within the industry that delineates aluminum extrusion manufacturing tolerances. Most extruders accept those tolerances as the standard (which is what it is), so few extruders feel the need to improve the breed because the tolerances are what they are.
However, the tolerances were produced at the time because of what the manufacturers were producing at the time...aluminum structural components. Aluminum structural components don't need to be straight to within .005" per foot but guide rails do.