1. Gear Box –Industrial
Applications
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V.J.MANDRAWADKER
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2. Gear Box- Industrial Applications
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Contents:
 Introduction
 Gear/Gear Box
 Types of Gears
 Types of Gear Boxes
 Construction of Gear Boxes
 Applications of Gear Boxes
 Conclusion
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 Introduction:
Every machine works at different speeds.But the
prime mover say motor runs at fixed RPM, say
1440,2800 etc. Hence it becomes necessary to
reduce the speed of the motor. Therefore one
assembly known as GearBox will be used in between
motor and output machine.
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 Gear: A gear is a cylindrical part having cut teeth on
its periphery , which mesh with another toother part
(gear) in order to transmit torque.
 Gear Box: A gear box is a mechanical method of
transferring energy from one device to another and is
used to increase torque while reducing speed.
It is an assembly of
Gears, shafts, bearings, keys, bearing covers, oilrings
, oilseals and a casing to house all these machine
elements.
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 Types of Gears:
 Spur
 Helical
 Bevel
 Worm
 Spiral
 Planetary
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6. Types of Gears
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 Classification of Gear Boxes: Gear Boxes are
classified as per the following criterion.
a) As per the type of gears used
i) Spur
ii) Helical
iii Bevel
iv) Worm
v) Spiral
vi) Planetary
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 b) As per the assembly of gear box
i) Horizontal
ii) Vertical
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 Construction of Gear Boxes:
 Every gear box contains the following elements.
 i) Gear box Housing or casing
 ii) Gears
 iii) Shafts
 iv) Bearings
 v) Bearing covers
 vi) Keys
 vii) Oil seals/oil rings
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 Gear boxes are widely used in Industries.It is
difficult to make a full list, however the following list
gives majority of applications.
1. Electric Overhead Travelling Cranes
2. Machine Tools e.g.Lathe,Drilling machines,Milling
machines,Grinding machines
3. Sugar machinery
4. Cement machinery
5. Automobiles
6. Material handling equipments
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 Conclusions:
 Gear box is an essential unit of every machine.
Because machine runs with specific speeds/torque
which are to be provided as per the need of
material,tool and customer.
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