Chain drive

Chain drive

• Chain drive is a way of transmitting mechanical power from one place to another.

• It is often used to convey power to the wheels of a vehicle, particularly bicycles and motorcycles.

• It is also used in a wide variety of machines besides vehicles.

• Most often, the power is conveyed by a roller chain, known as the drive chain, passing over a sprocket gear, with the teeth of the gear meshing with the holes in the links of the chain.

• The gear is turned, and this pulls the chain putting mechanical force into the system..

Chain drive

• Chain = sequence of inner link and pin link articulated to form a flexible device for power transmission


Classification of chains

Hoisting and hauling chains (or) crane chains

Conveyor chains

Power transmitting chains

Hoisting chain

• Chain with square link

Manufacturing cost is less

used in hoists, cranes

• Chain with oval link

Joint is welded

Used for slow speed


Conveyor chains

Detachable or hook joint type

Closed joint type

Power transmitting chains

Two types

Block chain

Bush roller chain

Made of malleable C.I

Run at speed of 3 to 12 KMPH

Do not run smoothly

Advantages of chain drive

• No slip takes place

• Occupy less space

• used when distance is low

• high transmission efficiency ( 98 %)


• production cost is high

• need accurate mounting and careful maintenance

• has a velocity fluctuations when stretched



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