8 ENGLISH
OPERATION
Theproperfasteningtorquemaydifferdependingupon
thekindorsizeofthescrew/bolt,thematerialofthe
workpiecetobefastened,etc.Therelationbetweenfas-
teningtorqueandfasteningtimeisshowninthegures.
Proper fastening torque for standard bolt
140
N•m
(kgf•cm)
(1428)
120
(1224)
100
(1020)
80
(816)
60
(612)
40
(408)
20
(204)
0
M16
M10
M8
M14
M12
(M16)
(M14)
(M12)
(M10)
(M8)
2
1
2.01.0
►1. Fastening time (second) 2.Fasteningtorque
Proper fastening torque for high tensile bolt
2
1
200
(2040)
N•m
(kgf•cm)
180
(1836)
160
(1632)
140
(1428)
120
(1224)
100
(1020)
80
(816)
60
(612)
40
(408)
20
(204)
0
M14
M12
(M14)
(M12)
(M10)
(M8)
M10
M8
2.0 3.01.0
►1. Fastening time (second) 2.Fasteningtorque
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:WhenfasteningM8orsmallerscrew,carefully
adjustpressureontheswitchtriggersothatthescrew
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. Whenthebatterycartridgeisdischargedalmost
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.