QL-MH Model
OPERATING INSTRUCTION
In order to use the torque wrench properly
and safely, please read this instructions before
operation. If any questions, please contact to
Tohnichi authorized distributor or Tohnichi office.
Keep this operating instruction for future use.
1
1Warnings
1Warnings
2Precautions
3Precautions for use
4How to use
5Torque check / Calibration
Contents
2Don't use this wrench for loosening.
Excessive torque may be applied while
loosening, which will cause damage to
the torque driver and could result in an
accident or injury.
3Make sure there is no oil, or grease on
the grip.
A slip of the hand while tightening, may
cause an accident or injury.
4Check for cracks, scratches and rust.
These will cause damage to the wrench
and may result in an injury. If such
conditions exist, have a functional test
performed and repair if necessary.
5Make sure when moving the ratchet
lever that it is in its correct position.
If the ratchet lever is only moved half
way, the ratchet will be damaged, and
that will cause an accident or injury.(Fig.1 )
6When you use this wrench in a high
location, prepare to prevent dropping
the wrench.
If you drop the torque wrench or socket,
that may cause a serious accident or injury.
7Don't use a pipe to extend handle.
This will cause damage to the torque
wrench and create an accuracy error.
(Fig.2)
8
1Don't use this wrench except for tightening
purposes.
This is a torque wrench for bolt Tightening
only.
Do not apply grease inside head to
prevent ratchet from slipping.
It may cause unexpected injury and
damage on ratchet.
2
1Don't apply momentum with your own
weight or use a jerking motion, when
you pull the torque wrench.
This will damage the torque wrench and
may cause the wrench to come off of the
bolt. Resulting in an accident or injury.
2Don't use the torque wrench beyond
the maximum torque setting.
This will cause damage or injury.
3Don't make the square drive smaller by
using an adapter.
This will create insufficient strength and
cause an accident or injury.
4Don't use the torque wrench if it is
missing a pin or scale plate, etc.
Ask a repair shop or our company to
inspect the torque wrench and repair it
before using.
5Don't modify the torque wrench.
Modifications will weaken the torque
wrench. This may cause errors in
accuracy, as well as, cause an accident
or injury.
6Don't drop the torque wrench or apply
a strong shock or jolt.
This will cause damage or deformation
as well as decrease the accuracy and
durability, which may cause an accident
or injury.
7Be aware of your surroundings when
handling a large capacity torque
wrench.
Turning or walking while holding a large
torque wrench may cause accident or
injury, if the user is not alert.
9Use only parts designated by Tohnich
for repair of the torque wrench.
Ask the place of purchase or our
company for assistance when you repair,
and use only Tohnichi parts.
8Don't stand the torque wrench on end.
If may fall or drop, and cause an
accident or injury.
2Precautions
3
3Precautions for use
1Make sure the torque wrench is set
correctly before using.
The torque is set on the minimum scale
for shipment.
2Do not set torque below minimum
scale torque.
3Use the wrench within the scale range.
4
5Don't lock Sup. Graduation, by using
pliers.
The lock mechanism will be damage d
and will not maintain torque accuracy.
6Don't use torque wrench in fresh
water or sea water.
The inside mechanism will go bad and
cause an accident or injury. If you drop
in water or sea water, get it checked out
or repaired.
7Use the correct socket that fits the hex
size of the bolts, you are using.
If you use an incorrect socket, this may
cause an accident or injury.
8Measurement precision is affected by
the grip position.
A mark is provided on the handle
surface to indicate the effective length.
(Fig.3)
9Stop tightening when you feel a click.
Applying more torque beyond the click
will lead to over torquing.
10
Make sure there is enough clearance
for your hand and elbow before using
to prevent injury.
11
Don't use the torque wrench ad a
hammer.
If there's a deformation on the beam, an
operation failure could result and cause
a decrease in the accuracy of the torque
wrench.
Confirm that the torque is set according
to te correct unit of measure before
using.
4
Fig.2
12
Perform regular inspections for
function and accuracy.
Periodical inspections are essential to
insure the torque wrench is in optimal
condition thus preventing injury.
13
Loading direction.
The loading direction must be a right
angles to the torque wrench (tolerance:
15 ) (Fig.4). This tolerance applies to
both horizontal and vertical deviation.
14
Remove any dirt such as dust, mud,
oil and water, etc. after each use and
before storing torque wrench.
15
When storing the torque wrench for a
long time, apply rustproof oil, and
keep in a dry place.
If improperly stored, the accuracy and
durability will decrease rapidly.
Store the wrench with torque graduation
set to the lowest setting.
Fig.3
Fig.4
Fig.1
5
4How to use
Set a torque.
Fig.6
Fig.5
1
Set a torque.
Turn the locker to the left to unlock the
Supplementary Graduation. (Fig.5)
Turn the Supplementary Graduation to set
a torque (combination of values on the
Main and Supplementary Graduations).
Turn the Locker to the right to lock the
Supplementary Graduation. (Fig.5)
Repositionthe pin if it contacts the Locker.
While reading Main Graduation, turn
Supplementary Graduation until 5Nm on
Main Graduation comes close to
Graduation Datum Line and then, align 0
on Supplementary Graduation with red
dot. Now, torque set is 5Nm. (Fig.6)
While reading Supplementary Graduation,
turn clockwise until 0.6 on Supplementary.
Graduation is aligned with the red dot.
Torque is set at 5.6Nm.
6
Fig.7
Apply the socket on to a bolt head or
nut.
Stop pulling the wrench when you
hear a "click".
2
3
4
Turn the torque wrench clockwise (
ONLY
direction on the tube) to fasten the bolt.
When you turn it counterclockwise
(opposite direction of
ONLY
), you don't
hear a "click".
The use for tightening the left hand
screw or loosening the bolt may cause
a failure.
ONLY
ONLY
Set a torque.
Turn the locker to the left to unlock the
Supplementary Graduation. (Fig.5)
Turn the Supplementary Graduation to set
a torque (combination of values on the
Main and Supplementary Graduations).
Turn the Locker to the right to lock the
Supplementary Graduation. (Fig.5)
Repositionthe pin if it contacts the Locker.
While reading Main Graduation, turn
Supplementary Graduation until 30N m
on Main Graduation comes close to
Graduation Datum Line and then, align 0
on Supplementary Graduation with red dot.
Now, torque set is 30Nm. (Fig.7)
While reading Supplementary Graduation,
turn clockwise until 6 on Supplementary.
Graduation is aligned with the red dot.
Torque is set at 36Nm.
5
Torque check / Calibration
0120-169-121
For torque check, use Tohnichi torque checker.
For calibration, use Tohnichi torque wrench tester.
TCC100N2-D-G or combination of TDT600CN3-G and TDTLA
is suitable for calibrating the torque wrenches in the range of
0.2N m - 6N m.
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