Features of TOHNICHI Torque Driver① High Accuracy
Exceeding the ISO6789 standard, digital type Torque screwdrivers STC2-G maintain the accuracy ±１％ and Indicating Torquescrewdrivers and Tightening torque screwdrivers hold ±3％ . (Refer to technical date P.94) Tightening torque screwdrivers such as
RTD, LTD are equipped with our original torque control (toggle mechanism), which enhances high accuracy and high durability.
Main Shaft

Toggle Seat
ToggleMain Shaft

Toggle Seat

Before the torque reaches the set torqueSerration

Tohnichi Original Torque Control Toggle MechanismTohnichi tightening torque screwdrivers are equipped with toggle mechanism
for torque control. When the torque has reached to the set value, the inside

Main Shaft

toggles will stand up and slip, and this tells user the set torque is achieved.

② High Durability
We guarantee accuracy and durability in the earlierof 100,000 cycles or one year at maximum torque.
Also, Tohnichi click type torque screwdriver such
as RTD series is able to use up to around a million
cycles if the tool is periodically calibrated andtaken the necessary repairing every a hundredToggle Seat

When the torque has reached the set torquethe toggles stand up.
Toggle Mechanism.

Durability test to ensure high durability
Tohnichi conducts durability testing when developing
new products. Before manufacturing new products,
we test durability as type certiﬁcation test Also whenmass production, we conduct sampling test regularly
to maintain our high level of durability.

thousand cycles (refer to technical data P.92).

③ Easy maintenanceTohnichi original toggle mechanism' enables gain-adjusting. Adjusting is possible without large scale disassembling such as replacing main spring of the screw driver, andthat helps to cut the maintenance time and cost (refer to technical data P99-100).

④ Hexagonal locker to prevent rolling
Tohnichi has changed the locker design from the old circled shape to the new hexagonal shape and thiscould prevent the torque screw driver from rolling and unexpected dropping. Lockers are the importantparts that maintain alignment of readings. This re-designed hexagonal lockers prevent such accidents.
Along with this development, locker can be easily repaired. (Refer to technical date P.110)

156

Hexagonal lockerTOHNICHI TORQUE HANDBOOK Vol.8

Torque Screwdriver⑤A large collection of series
and product line
From the smallest torque (0.1mN・m) toIndicating Torque Screwdriver Click Type Torque Screwdriverlarge torque(16N・m), Tohnichi torquescrewdrivers have a wide range of products.
MTD model

FTD model(Minimum torque 0.1ｍN・ｍ）(Maximum torque 16N・ｍ）⑥Calibration devices
We cover TDT3 series for calibration,
LC3 or ATGE/BTGE series for daily
check

Calibration

Daily checkTohnichi 2 types of torque screwdrivers (for your ideal work )Signal type torque screw driver■Rotary Slip modelTorqueA clear Rotary-slip shake signals tightening completion upon reaching the set torque.
Set torqueThe shock repeats if tightening after reaching the set torque continues. Because users
can tighten no further than the set torque, over-torque is completely prevented.
A sample product of rotary-slip type torque screwdrivers
RTD [P.158]

Tightening angle

Torque■Click type (non-rotary slip)
A clear click sound signals tightening completion upon reaching the set torque. Once recognizSet torqueing the click sound, loosen and ﬁnish tightening to avoid over-torque. Compared with rotary slip
type, click type screwdrivers are low impact; they are suitable for tightening precision devices.

A sample product of click type torque wrench
Click

LTD [P.160]
Tightening angle

Features of TOHNICHI Torque Driver157