Panasonic EY75A1 Operating Instructions Manual page 15

2) Tightening time
Longer tightening time results in increased
tightening torque. Excessive tightening,
how ever, adds no value and reduces the
life of the tool.
3) Different bolt diameters
The size of the bolt diameter affects the
tight ening torque.
Generally, as the bolt diameter increases,
tightening torque rises.
4) Tightening conditions
Tightening torque will vary, even with the
same bolt, according to grade, length, and
torque coefficient (the fixed coefficient indi-
cated by the manufacturer upon produc-
tion).
VI. ACCESSORIES
Use only suitable size of bit.
Panasonic original Optional Quick change chuck (EY9HX110E or EY9HX111E).
Chuck Size: 6.35 mm hex
5) Socket play
6) Switch (Variable speed control trigger)
7) Effect of Connecting Adaptor
EY9HX110E
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Tightening torque will vary, even with
the same bolting material (e.g. steel),
accord ing to the surface finish.
Torque is greatly reduced when the bolt
and nut start turning together.
Torque is lowered as the six-sided
configu ration of the socket of the wrong
size is used to tighten a bolt.
Torque is lowered if the unit is used with
the switch not fully depressed.
The tightening torque will be lowered
through the use of a universal joint or a
connecting adaptor.
EY9HX111E