How to Use

A good air supply, proper preparation and knowledge of correct usage
ensure that TOHNICHI power torque tools perform at their best.
Pressure gauge

Main pipe

Branch pipeBalancer

Power Torque Tools

1% or more

Valve
Hose

Pressure gauge (temporary)

One-touch coupler

Filter, pressure regulator
and lubricator

FilterPressure regulator
Lubricator
Spiral hose
Drain tank

Torque tool

Drain pipe

Torque tool

■ GOOD PIPING
Most troubles with pneumatic equipment are caused by bad air pressure. Use with asufficiently large pipe diameter and filter, pressure regulator and lubricator.
● Good piping has the following features:
1. It should not reduce air pressure.
Pneumatic equipment requires a certain minimum level of pressure for it to function. The inner diameters of the main
pipe, branch pipes and hoses must be large enough, and the pipes must also be as short as possible. Use a filter,pressure regulator, lubricator, valves and joints that suit the flow. Pressure loss in the piping must be 0.1MPa or less.
2. It should not admit drain or foreign materials.
Compressed air naturally contains moisture, which should be removed with an after-cooler. Piping should have agradient of 1% or more so that accumulated drain inside does not enter the pneumatic equipment. Branch pipes shouldcome out from the upper side of the main pipe. Drain tanks and drain pipes should be arranged at the lowest part ofthe main pipe and in branch pipes. Before connecting piping to pneumatic equipment for the first time, blow air throughit to expel foreign materials.
3. It should have oil inserted.
The air motor of a power torque tool rotates at 10,000rpm. Supply ISO VGA32 (turbine oil # 90) to the piping with alubricator. If you do not use the tool for more than a week, remove the one-touch coupler and add about ten
drops of oil. Then, rotate the tool slightly to make the oil infiltrate into the motor. This will prevent rust.

344

TOHNICHI TORQUE HANDBOOK Vol.8

When the air pressure is lower than the specified value, the allowable torque setting rangeof TOHNICHI s power torque tools will be limited (See the diagram below). Be sure to use
the tools at their specified pressure. Providing that the air pressure is within the allowable
torque setting range, the tightening torque due to the air pressure will not change.

Speciﬁed pressure [MPa]0.40.5

0.6

100

Example:Not usable
When using a U120CN tool (with a specified pressure 0.5

Usable range %90[MPa]) at a supply pressure of 0.4 [MPa].
Usable range limit (80% from the figure on the left)
120×0.8 = 96cN・m

80

Set torque
The torque can be set between 40 and 96 [cN·m].

UsableIf the torque is set between 96 and 120 [cN·m], theautomatic stop will not operate and the tool will stall.

70

In such a situation, the tightening torque may beinsufficient.

60(If the tool stops automatically, the normal tightening
torque is guaranteed.)

0.3

0.4

0.5

0.6

0.7

※ Set torque = Tightening torqueSupply pressure [MPa]Notes
1. When the supply pressure is 0.4MPa or less, the valve function will not be reliable.
2. The supply pressure does not affect the usable range of semi-automatic tools.
3. When the supply pressure is low, use a tool that is one size larger.

How to Use345

Power Torque Tools■ Air pressure and operating range