Micrometer Torque Wrenches
OPERATION
OPERATION OPERATION
MAINTENANCE AND STORAGE
INTERNAL MECHANICS
WRENCH MODELS
APPLYING TORQUE
FEATURES
Product Manual
SETTING THE TARGET VALUE
1 2
3
4
TRQ5040
TRQ5140
TRQ5240
TRQ52403
1/4 in
3/8 in
1/2 in
1/2 in.
20–20
10–10
40–20
40–300
0.
2
in-l
ft-l
ft-l
ft-lb
Min. Increment
10.1 in
15.6 in
19.1 in
26.1 in.
Units
Overall Length
Item Drive Size Range
You can find the torque value at the intersection of two scales: the Main Scale, marked
with major graduations on the handle body, and the Micrometer Scale, marked with fine
increments and located at the top of the knurled handle above the locking collar.
A
tt
ach
a
dr
i
ve
t
oo
l t
o
t
he
dr
i
ve
t
a
n
g
a
n
d
e
n
gage
t
he
n
u
t
or
b
o
lt t
o
b
e
ti
gh
t
e
n
ed
.
Gr
i
p
t
he
ha
n
d
l
e
so
your
m
i
dd
l
e
fin
ger
res
t
in
s
i
de
t
he
groove
in t
he
k
n
ur
lin
g
.
Th
i
s
i
s
where
t
he
pressure
shou
l
d
b
e
co
n
ce
nt
ra
t
ed
.
Pull the locking collar
down fully until it rests
against the knurled
handle, and keep it held
down during step 2.
Adjust the setting by
turning the handle until the
top edge of the knurled
handle aligns with the
major graduation closest
to your target value. Then,
fine-tune the setting by
aligning the desired mark
on the micrometer scale
with the vertical line on the
main scale.
Release the locking
collar,
then tr
y
twisting
the knurled handle in both
directions to confirm that
it is locked at the target
torque value and the
collar is full
y
raised.
T
he
handle onl
y
locks on
e
x
act increments
—
not
between them.
STOP applying torque as soon as you hear or
feel the click. This indicates that you’ve reached
the target torque value.
I
f
you
do
n
’
t
p
l
ace
your
ha
n
d
correc
tl
y
as
show
n
,
you’
ll
ge
t
a
n in
accura
t
e
t
orque
measureme
nt.
Do
n
'
t
use
ex
t
e
n
s
i
o
n
s
o
n t
he
ha
n
d
l
e
–
do
in
g
so
produces
in
accura
t
e
t
orque
a
n
d
ca
n
damage
t
he
wre
n
ch
.
P
u
llin
g
t
oo
qu
i
ck
l
y
or
w
it
h
t
oo
much
f
orce
may
cause
you
t
o
m
i
ss
t
he
exac
t t
orque
se
ttin
g
.
Do
n
’
t b
ear
dow
n
o
n t
he
wre
n
ch
w
it
h
your
b
ody
we
i
gh
t–t
h
i
s
ca
n
cause
you
t
o
overshoo
t
your
t
arge
t
or
in
j
ure
yourse
lf.
WHEN SWITCHING DRIVE DIRECTIONS:
S
e
t t
he
t
orque
wre
n
ch
t
o
it
s
l
owes
t
va
l
ue
b
e
f
ore
se
ttin
g
t
he
t
arge
t
va
l
ue
—
t
h
i
s
a
ll
ows
int
er
n
a
l
compo
n
e
nt
s
t
o
re
t
ur
n t
o
a
n
eu
t
ra
l
pos
iti
o
n.
W
he
n t
orque
i
s
fi
rs
t
app
li
ed
in t
he
n
ew
d
i
rec
ti
o
n
,
you
may
hear
or
f
ee
l
a
so
ft
“
pop
”
as
t
he
mecha
ni
sm
sh
ift
s
.
Do
n
o
t
keep
pu
llin
g
a
ft
er
t
he
c
li
ck,
as
t
h
i
s
ca
n
over
ti
gh
t
e
n t
he
f
as
t
e
n
er
.
U
se
ex
t
ra
care
whe
n
work
in
g
a
t l
ower
t
orque
se
ttin
gs
.
F
or
o
ff-
ax
i
s
t
oo
l
s,
li
ke
a
crow
f
oo
t
wre
n
ch,
ca
l
cu
l
a
t
e
a
l
everage
ad
j
us
t
me
nt if n
eeded
(P
age
5
)
.
M
i
crome
t
er
S
ca
l
M
echa
ni
ca
l
C
li
ck
S
t
y
l
90-
Too
t
h
R
a
t
che
Dua
l-
D
i
rec
ti
o
+
/-3
%
Accuracy
Before using the torque wrench, we recommend you read and understand the
entire manual. This tool is a precision measuring instrument that you should
operate, store, and maintain with care. Failure to follow instructions could result
in damage to the tool, damage to property, or injury.
P
u
ll t
he
wre
n
ch
s
l
ow
l
y
t
o
o
b
serve
t
he
c
li
ck
To
ma
int
a
in
accuracy,
s
t
ore
t
he
wre
n
ch
w
it
h
t
he
t
orque
sca
l
e
se
t t
o
t
he
l
owes
t
va
l
ue
pr
int
ed
o
n t
he
ha
n
d
l
e
b
ody
.
Do
n
o
t
use
t
he
wre
n
ch
as
a
ra
t
che
t
(
e
.
g
.
,
f
or
b
reak
in
g
l
oose
a
f
as
t
e
n
er
)
I
f
you
drop
or
damage
t
he
wre
n
ch,
t
es
t
a
n
d
ver
if
y
it
s
accuracy
b
e
f
ore
use
.
Need Help?
Call 888-648-3371 or visit tekton.com/support
1 3
PULL the wrench SLOWLY with even pressure in
your hand. Maintain control and be ready for a
click.
2
HANDLE
BODY LOCKING
COLLAR KNURLED
HANDLE
M
AIN
SCALE
M
ICRO
M
ETER
SCALE
C
l
ea
n t
he
wre
n
ch
b
y
w
i
p
in
g
it
w
it
h
a
c
l
ea
n
,
dry,
lint-f
ree
c
l
o
t
h
.
Do
n
o
t i
mmerse
it in
a
n
y
t
ype
o
f li
qu
i
d
or
c
l
ea
n
er
–
do
in
g
so
may
damage
t
he
int
er
n
a
l
compo
n
e
nt
s
.
Th
i
s
wre
n
ch
i
s
a
prec
i
s
i
o
n
measur
in
g
in
s
t
rume
nt.
Take
care
t
o
opera
t
e
it
correc
tl
y
a
n
d
s
t
ore
it in
a
c
l
ea
n
,
dry
e
n
v
i
ro
n
me
nt.
I
f
you
have
n
’
t
used
t
he
wre
n
ch
regu
l
ar
l
y,
opera
t
e
it
severa
l ti
mes
a
t
a
l
ow
t
orque
va
l
ue
t
o
a
ll
ow
int
er
n
a
l
l
u
b
r
i
ca
nt t
o
recoa
t
mov
in
g
par
t
s
.
W
he
n
you’re
n
o
t
us
in
g
t
he
wre
n
ch,
s
t
ore
it
a
t t
he
l
owes
t
t
orque
va
l
ue
.
Th
i
s
re
li
eves
compress
i
o
n
o
n t
he
int
er
n
a
l
spr
in
g,
preve
ntin
g
f
a
ti
gue
t
ha
t
cou
l
d
a
ff
ec
t
accuracy
.
Do
n
o
t t
ur
n t
he
ha
n
d
l
e
b
e
l
ow
t
h
i
s
se
ttin
g
.
Direction
SwitchDirection
Switch
FORCE
SERVICE KITS
5 6
7 8
Using an off-axis tool such as a crowfoot wrench or torque adapter can alter the
effective length of the torque wrench. When this happens, you must adjust the target
value on the wrench to ensure the correct torque is applied to the fastener.
Torque specification for the fastener
Effective length of the torque wrench,
measured after setting the initial target
value to T1
Change in length caused by the drive
tool extending beyond or behind the
drive square
Corrected target value you should set
on the torque wrench.
Accurate Inaccurate
T
T2
–
Each wrench is calibrated to be
accurate within +/-3%.
This torque wrench has a serial number that
matches a unique certificate of calibration
included in the case.
We keep it simple—if your tool doesn't work like it should, let us know and we'll make it
right. No time limits, no receipts, and we ship replacement parts within the United States
andCanada.
HOW TO CORRECT FOR OFF-AXIS TOOLS TORQUE CORRECTION EXAMPLES
PARTS, ASSEMBLY, AND SERVICE KITS TORQUE UNIT CONVERSIONS
WARRANTY AND SUPPORT
CERTIFICATE OF CALIBRATION
TRQ50402 - 1/4 in. Drive (20–200 in-lb
TRQ51402 - 3/8 in. Drive (10–100 ft-lb
TRQ52402 - 1/2 in. Drive (40–200 ft-lb
TRQ52403 - 1/2 in. Drive (40–300 ft-lb)
S
RH9X0
1
S
RH9X0
1
S
RH9X0
1
S
RH9X0
1
5
Tor
q
ue
W
rench
R
atchet
S
er
v
ice
K
it
Need Help? Call 888-648-3371 or visit tekton.com/support
1
in-lb
=
0
.
0833
ft-l
=
0
.11
30
N
=
0
.
0
11
5
kg-
=
1.1
52
1 kg-cm
=
1
2
.
0000
in-l
=
1.
3558
N
=
0
.1
383
kg-
=
1
3
.
8255
kg-cm
=
8
.
8507
in-l
=
0
.
7376
ft-l
=
0
.1
020
kg-
=
1
0
.1
972
kg-cm
1
f
t-lb
1
Nm
3707
R
oger
B C
haffee
SE
•
Grand
R
apids
, MI
49548
•
M
ade
in
T
aiwan
T
e
k
t
o
n
.
c
om
CONTACT US
RESOURCE
G
UIDE
888
-
648
-
337
1tekton.com
/
support support
@
tekton.com
S
er
i
a
l N
u
mb
er
T
1 =
T
2
L
L
+
C
×
CORRECTION FORMULA
H
ow
t
o
M
eas
u
re
C
hange
in
L
eng
t
h
(
C
)
H
ow
t
o
M
eas
u
re
C
hange
in
L
eng
t
h
(
C
)
B
eyond
B
ehind
N
o correction is needed
if the drive square and
fastener are aligned at a
right angle to the handle.
See page
6
for a reference diagram
A
correction is needed
if the fastener is positioned
beyond or behind the drive square, changing the
effective length. Use the formula below to correct
your target value.
O
R
L
eng
t
h
A
dded
L
eng
t
h
S
ubt
ra
ct
ed
N
o
L
eng
t
h
A
dded
C
AU
T
ION:
O
nly the ratcheting mechanism is user-serviceable.
I
f you disassemble any
other part of your torque wrench you may take it out of calibration. The parts and
assembly may vary slightly depending on the model.
