Makita DTW284 Manual De Instrucciones página 9

Model DTW284
Proper fastening torque for standard bolt
N•m
280
240
200
160
2
120
80
M12
40
0
1. F astening time ( se c on d ) 2. F astening tor q ue
Proper fastening torque for high tensile bolt
N•m
280
240
200
160
2
120
80
40
0
1. F astening time ( se c on d ) 2. F astening tor q ue
Model DTW285
Proper fastening torque for standard bolt
N•m
280
240
200
160
2
120
80
M12
40
0
1. F astening time ( se c on d ) 2. F astening tor q ue
M20
M16
1 2
1
M16H
M14H
M12H
1 2 3
1
M20
M16
2
1
1
Proper fastening torque for high tensile bolt
N•m
280
240
200
2 160
M20
120
80
M16
40
M12
1. F astening time ( se c on d ) 2. F astening tor q ue
NOTE: H ol d t h e tool pointe d straig h t at t h e bolt or nut.
NOTE: Excessive fastening torque may damage the
bolt/nut or impact socket. Before starting your job,
al w a y s per f orm a test operation to d etermine t h e
proper f astening time f or y our bolt or nut.
NOTE: I f t h e tool is operate d c ontinuousl y until t h e
batter y c artri d ge h as d is c h arge d , allo w t h e tool to rest
M16H
f or 1 5 minutes be f ore pro c ee d ing w it h a f res h batter y
c artri d ge.
M14H The fastening torque is affected by a wide variety of
factors including the following. After fastening, always
c h e c k t h e tor q ue w it h a tor q ue w ren c h .
M12H
. When the battery cartridge is discharged almost
c ompletel y , v oltage w ill d rop an d t h e f astening
tor q ue w ill be re d u c e d .
2. I mpa c t so c ket
Failure to use the correct size impact socket
w ill c ause a re d u c tion in t h e f astening tor q ue.
A worn impact socket (wear on the hex end
or s q uare en d ) w ill c ause a re d u c tion in t h e
f astening tor q ue.
3. Bolt
Even though the torque coefficient and the
c lass o f bolt are t h e same, t h e proper f asten-
ing tor q ue w ill d i f f er a c c or d ing to t h e d iame-
ter o f bolt.
Even though the diameters of bolts are the
same, t h e proper f astening tor q ue w ill d i f f er
according to the torque coefficient, the class
o f bolt an d t h e bolt lengt h .
M20
. The use of the universal joint or the extension
bar some w h at re d u c es t h e f astening f or c e o f t h e
impa c t w ren c h . C ompensate b y f astening f or a
M16
longer perio d o f time.
. The manner of holding the tool or the material
M12
o f d ri v ing position to be f astene d w ill a f f e c t t h e
tor q ue.
6 . O perating t h e tool at lo w spee d w ill c ause a re d u c -
tion in t h e f astening tor q ue.
9 ENGLISH
M14H
M12H
0
1 2
1
M16H
M16H
M14H
M12H
3