Ergonomics - Atlas Copco

Evaluation of hand-held power tools - handle design
Variables Weighting factors Preferred Acceptable Permitted To be avoided
(a) (0) (1) (3) (5)
Circumference a1=1,no Male 110-130 mm; Male 105-110 mm Male 100-105 mm Male 155 mm;
trigger application; Female 95-100 mm Female 90-95 or Female < 90 or
activated a1=2,with or 120-130 mm 130-140 mm >140 mm
appreciable force
application
Max. a2=1 Male