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

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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

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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 %)

Disadvantages

• production cost is high

• need accurate mounting and careful maintenance

• has a velocity fluctuations when stretched

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