Page 124 - CITS - Fitter - Trade Theory

FITTER - CITS

LESSON 19: Power Transmission (Method Of Drives)

Objectives

At the end of this lesson you shall be able to
• state the different types of power transmission drives
• state the key components of belt drive system
• state the advantages and limitation of rope drive system.

Different method of Drives and its application

Introduction of Power

A Machine consists of a power source and a power transmission system, which provides controlled application
of the power.
Transmission Drives
Transmission Drives are an assembly of parts including the speed-changing device and the propeller shaft by
which the power is transmitted from an engine/motor to a live axle.
Types of Power Transmission Drives
- Shaft & Axles

- Belt Drives
- Rope Drives
- Chain Drives

- Gear Drives
1 Shaft & Axle
Shaft and Axle are the machine members, mostly cylindrical in section which support the revolving part of a
machine.
2 Belt Drive
A belt drive is a method of transmitting mechanical power from one rotating shaft to another. It typically consists of
a belt, usually made of rubber or other flexible materials, and a set of pulleys or sheaves. The belt wraps around
the pulleys, creating friction, which transfers power from the driving shaft to the driven shaft.
Key components of a belt drive system include: -

1 Belt
The belt is the flexible loop that connects the pulleys.
It’s often made of materials like rubber, neoprene, or polyurethane, chosen for their flexibility, durability, and
resistance to wear and tear.

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CITS : CG & M - Fitter - Lesson 18