PLASSLASHCASE datasheet(7/32 Pages) ETC

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cycles and other application related details.

To locate your nearest Utica Service Center

for calibration, simply visit our website at

www.uticatools.com.

Rapid Select Means Fast Delivery

Models indicated with the Rapid Select

icon represent our most popular tools,

and are available for fast delivery in limited quantities.

Ordering Information

Utica products are distributed world-wide. To locate

your nearest Utica distributor, visit our website at

www.uticatools.com or contact us at

(937) 222-7871 or fax (937) 228-0422.

What Is Torque?

The concept of torque is a mystery for many people.

Ask a group of people to define torque and you’ll

probably receive a variety of answers. Open a

dictionary to the definition of torque and you’ll be

greeted with terms such as torsion, axis, and vector.

However, if the definition of torque is boiled down to

layman’s terms, it is the measurement of a turning or

twisting force. A simple example is the force

required to turn the head of a bolt on an automobile

chassis. Most tool boxes would include some of the

most common tools used to apply torque, such as

screwdrivers,

wrenches, and

impact tools.

When torque is

applied to the

head of a bolt

during a fasten-

ing process,

there are actually

two main forces

at work. First, we

are applying a

force - torque to

the bolt head to

tighten it. The

second force at

work is the ten-

sion or stretch

created that runs

the length of the

bolt. These two forces are closely related. The more

torque applied to the bolt head, the more tension or

“stretch” is applied to the length of the bolt.

Why Is Torque Important?

When we apply torque to fasteners such as bolts

and screws, we are actually clamping parts together.

The amount of torque applied determines how

well the fastener does its job in the long run. If we

apply too little torque, the fastener can vibrate and

eventually loosen. On the other hand, if we apply

too much torque, the fastener will over stress and can

break or strip the threads. Either way, the fastener

doesn’t do what its suppose to do – hold something

together. The objective is to apply enough torque to

a fastener, creating tension that is greater than any

external force trying to separate it.

How Is Torque Measured?

Torque is measured by multiplying the amount of

force applied by the distance from the point we are

turning. For instance, if we are turning a bolt and apply

5 lbs. of force at the end of a wrench measuring 1

ft., the torque would equal 5 ft. lbs. This doesn’t tell

us what the optimal torque is for the fastener, but it

does allow us to quantify the amount of torque we

are applying to a fastener.

What Is The Correct

Torque Level For A Fastener?

When an engineer calculates the correct torque level

for a fastener, several issues must be addressed. The

first issue is the maximum load that the fastener will

experience. Second is the strength of the material

that the fastener will clamp. Third is whether the joint

is hard or soft. The fourth issue is the nature of the

external force acting on the joint, such as vibration,

pulling, or twisting.

Through statistical analysis, an engineer can

determine the optimal level of torque that should be

applied to a joint for maximum performance.

Force

Torque

Clamping

Force

Tension

In Bolt

5 lbs. of Force

@ 12”= 5 ft.lbs

10 lbs. of Force

@ 6”= 5 ft.lbs

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