To the user
In order to use the torque wrench
properly and safely please read the
Instructions before operation.If there are
any questions,please contact a Tohnichi
authorized distributor or Tohnichi sales
office. Keep these Operating Instruc-
tions for future use.
DB / DB5 Model
DBE / DBE5 Model
OPERATING INSTRUCTION
DB4 / DB5 Model
1Warnings
2Precautions
3Precautions for use
4Specifications
5Operating procedure
1Don't use this wrench except for tightening
purposes.
This is a torque wrench for bolt tightening
only.
2Make sure there is no oil, or grease on the
grip.
A slip of the hand while tightening, may cause
an accident or injury.
3Check 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.
4Securely connect the extension handle
(DBE type).
If it is loose,it may drop causing a serious
accident or injury.
5When 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.
Contents
1Warnings
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.
2Precautions
1
6Don't use a pipe to extend handle.
This will cause damage to the torque wrench
and create an accuracy error. (Fig.1)
2Don't use the torque wrench beyond the
maximum torque setting.
This will cause damage or injury.
3Precautions for use
1Confirm that the torque is set according to
the correct unit of measure before using.
(kgfcm, kgfm, Nm, etc)
2
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.
8Don't stand the torque wrench on end.
If may fall or drop,and cause an accident or
injury.
9Use only parts designated by Tohnichi for
repair of the torque wrench.
Ask the place of purchase or our company
for assistance when you repair, and use only
Tohnichi parts.
2Don'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.
3Use 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.
4Make sure there is enough clearance
for your hand and elbow before using to
prevent injury.
7Loading direction.
The loading direction must be at right angles
to the torque wrench (tolerance: 15 )
(Fig.2). This tolerance applies to both
horizontal and vertical deviation.
8Remove any dirt such as dust,mud,oil and
water,etc.after each use and before storing
torque wrench.
Fig.1
3
5Don't use the torque wrench as 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.
6Perform regular inspections for function
and accuracy.
Periodical inspections are essential to insure
the torque wrench is in optimal condition thus
preventing injury.
Fig.2
9For models having 25.4mm square drive,
use with a through-holesocket(pneumatic
tool type).
Connecting a socket (manual tool type)
having no through-hole may result in
disconnection.
10
Do not use this insrument for a breaking
test.
Using under breaking or rupture test may
result in the needle dose not return to its Zero
point correctly.
4
4Specifications
5Operating Procedure
DB Series
Set the main pointer to the 0 position on the
scale plate. (Fig.3) (Rotate the scale plate until
the0 position is aligned with the main pointer.)
For models with a memory pointer, measure
the torque only after setting the memory
pointer to0 position by turning the memory
pointer knob opposite to measuring direction.
Insert the square drive of the wrench into the
required socket.
Apply the socket on to a bolt head or nut.
Apply force to the center of the grip and mea-
sure while watching scale plate.
The DB wrench is bi-directional.
The measurement can also be made by setting
the main pointer to the desired torque,and
pulling the wrench until the main pointer
reaches0 position on the scale plate. (Fig.4)
DBE, DBR Series
Attach the extension handle to main wrench.
Confirm that the pin has locked the extension
handle in place.
Set the main pointer to the 0 position on the
scale plate. (Fig.3) (Rocate the scale plate until
the0 position is aligned with the main pointer.)
For models with a memory pointer, measure
the torque only after setting the memory
pointer to0 position by turning the memory
pointer knob opposite to measuring direction.
Insert the square drive of the wrench into the
required socket.
Apply the socket on to a bolt head or nut.
Apply force to the center of the grip and mea-
sure while watching scale plate.
The DB wrench is bi-directional.
The measurement can also be made by setting
the main pointer to the desired torque,and
pulling the wrench until the main pointer
reaches0 position on the scale plate. (Fig.4)
Fig.3 Fig.4
0120-169-121
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