Hitachi WH 18DBFL Manual De Instrucciones página 15

(3) Diameter of bolt
The tightening torque differs with the diameter of
the bolt. Generally a larger diameter bolt requires
larger tightening torque.
(4) Tightening conditions
The tightening torque differs according to the torque
ratio, class, and length of bolts even when bolts with
the same size threads are used. The tightening
torque also differs according to the condition of the
surface of workpiece through which the bolts are to
be tightened. When the bolt and nut turn together,
torque is greatly reduced.
(5) Tightening torque varies, depending on the battery's
charge level.
English
15