CDI Torque Products

Universal Tools

eMaxAction.com offers the following CDI Torque Products for online purchase and free STANDARD delivery.

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CDI was founded in 1968 and over the years has developed into a world class torque products manufacturing company. The company earned its ISO 9001 International Quality System Certification in 1998, demonstrating a commitment to provide our customers with the highest quality torque measurement and torque limiting devices in the world. CDI joined the Snap-on® family of companies in 1995.

CDI is the primary supplier of torque wrenches and torque screwdrivers to the GSA (General Service Administration of the U.S. Government) since 1968. All CDI products are individually serialized and meet or exceed appropriate ASME and ISO standards.

CDI?s mechanical torque product lines include click type torque wrenches, dial indicating torque wrenches, torque limiting screwdrivers and a number of special application torque products. CDI has long been a major innovator and leader in electronic torque measurement and torque calibration equipment. We manufacture more electronic torque wrenches than any other company and are a recognized leader in electronic torque testing and calibration equipment.

We work with our customers to develop the tools they need to solve torque-related problems. CDI?s mission is to remain the world?s largest developer and supplier of quality torque tools, torque testing equipment and calibration services.

All CDI employees recognize the importance of our customers? satisfaction with our products and services. We have a full time Product Development Team dedicated to develop and deliver innovative new torque products.

What is Torque??

According to Webster:
A twisting or wrenching effect, or moment, exerted by a force acting at a distance on a body, equal to the force multiplied by the perpendicular distance between the line of action of the force, and the center of rotation at which it is exerted.

A force, which tends to produce rotation. The measurement of torque is based on the fundamental law of the lever.

Basic Torque Formula
L (length) x F (force) = T (torque)

Example: A two foot lever at a right angle to the fastener with 200 pounds at the end will produce
400 foot/pounds of torque.

Torque Formula: L x F = T

Torque is expressed in
commonly used units of
measurement such as:

in. lbs. = inch pounds
ft. lbs. = foot pounds
Nm = Newton meter
cNm = Centi Newton meter

Torque and Clamping Forcee
Controlling the torque applied in tightening threaded fasteners is the most commonly used method for the application of clamping force. There are many factors which may affect the relationship between torque and clamping force of threaded fasteners. Some of these are: the type of lubricant used on the threads, the material from which the bolt and nut are made, the type of washers used, the class and finish of threads and various other factors. It is not possible to establish a definite relationship between torque and clamping force which will be applicable for all conditions.

Torque Versus Clamping Force

Only a small part of the torque applied to a fastener contributes to clamping force. The remaining, as much as 90% of the total applied torque, is used to overcome friction under the fastener head (or between nut and washer) and friction in thread engagement.

TORQUE

Head Friction:
45% - 55%

Thread Friction:
35% - 45%

Clamping Force:
10%

TORQUE
1. Head Friction
2. Thread Friction
3. Clamping Force

What are we trying to achieve with a torque wrench?

Answer: Proper Clamping Force

Torque Conversion


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