Page 5 of Dotco Ergonomics by Cooper Power Tools

how to build high-output tools with a high level of comfort vibration-reducing dampening materials should surround motor housings thermally-isolated composite handles reduce tool weight and the effects of cold temperatures different handle sizes are provided to accommodate physiological and gender differences among users special mufflers can reduce sound levels to accepted standards without compromising tool power and performance handle design should direct cold air exhaust and possible oil mist away from workers hands torque reducers help assure a captive grip ideal for comfort and control ­ yet resist in-hand tool movement under load vibration is minimized through the use of specially designed comfort grips which isolate the operators hand from the tool in some cases composite housings are also used impact and stain-resistant plastic composite handles provide shock absorbency and thermal protection lever triggers located in tool grips can simplify long-cycle operation and high-force tasks and allow tool positioning before start-up time-proven motor and gear design is well balanced to reduce vibration and extend tool life full feathering is accomplished with our pressurized tip-valve design for speed control while drilling rubber grip acts as a thermal protector and isolates vibration for improved operator comfort handles are shaped to fit the human hand they are flat where they need to be flat and round where they need to be round design features double ball bearings for the spindle pre-loaded for longer bearing life and more accurate spindle control vibration and spindle wobble are reduced each tool is individually checked aligned and adjusted on our assembly line for minimum chuck runout vibration and spindle wobble are minimized gears are machined from alloy steel and heat-treated with fixed cages to control centers for smooth operation the trigger is practically forceless requiring only 4 ounces of pressure to ergonomically critical engage finger and thumb guides fit the hand and aid in control finger lip under the trigger keeps other fingers from interfering with the trigger action minimal noise levels enhance operator comfort.

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