10 ENGLISH
OPERATION
Theproperfasteningtorquemaydifferdependingupon
thekindorsizeofthescrew/bolt,thematerialofthe
workpiecetobefastened,etc.Therelationbetweenfas-
teningtorqueandfasteningtimeisshowninthegures.
Standard bolt
N•m
(kgf•cm)
2
1
2
0
100
(1020)
120
(1224)
80
(816)
60
(612)
40
(408)
20
(204)
M12
M14
M10
M12
M14
M10
M8
M8
3
1.Fasteningtime(second)2.Fasteningtorque
3.Properfasteningtorquecorrespondingtoeachbolt
diameter
High tensile bolt
32
1
N•m
(kgf•cm)
210
80
(816)
60
(612)
40
(408)
20
(204)
3
100
(1020)
120
(1224)
M10
M12
M12
M8
M8
M10
1.Fasteningtime(second)2.Fasteningtorque
3.Properfasteningtorquecorrespondingtoeachbolt
diameter
Holdthetoolrmlyandplacethepointofthedriverbit
inthescrewhead.Applyforwardpressuretothetoolto
theextentthatthebitwillnotslipoffthescrewandturn
the tool on to start operation.
NOTICE: If you use a spare battery to continue
the operation, rest the tool at least 15 min.
NOTE:Usetheproperbitfortheheadofthescrew/
bolt that you wish to use.
NOTE: When fastening M8 or smaller screw, choose
aproperimpactforceandcarefullyadjustpressureon
the switch trigger so that the screw is not damaged.
NOTE: Hold the tool pointed straight at the screw.
NOTE: If the impact force is too strong or you tighten
thescrewforatimelongerthanshowninthegures,
the screw or the point of the driver bit may be over-
stressed, stripped, damaged, etc. Before starting your
job,alwaysperformatestoperationtodeterminethe
proper fastening time for your screw.
Thefasteningtorqueisaffectedbyawidevarietyof
factorsincludingthefollowing.Afterfastening,always
checkthetorquewithatorquewrench.
1. When the battery cartridge is discharged almost
completely, voltage will drop and the fastening
torquewillbereduced.
2. Driver bit or socket bit
Failure to use the correct size driver bit or socket
bitwillcauseareductioninthefasteningtorque.
3. Bolt
• Eventhoughthetorquecoefcientandthe
class of bolt are the same, the proper fasten-
ingtorquewilldifferaccordingtothediame-
ter of bolt.