Spur gears transmit power between two parallel shafts by meshing teeth without slip. The smaller gear is called the pinion and the larger is called the gear. Spur gears have teeth parallel to their axis. They are simple, inexpensive to manufacture, efficient, and precise. Common materials used for spur gears include plastic, brass, steel, and aluminum. Spur gears can be manufactured through processes like hobbing, shaping, and broaching. Hobbing involves sequential cuts by a cutting tool in the shape of a gear to form teeth. Broaching uses a toothed broach tool to cut teeth in one pass, making it efficient. Spur gears are used widely in devices to transmit motion between parallel shafts.

1. KIFAYAT ULLAH
CU-499-2012

2. Gears are toothed members which transmit
power / motion between two shafts by
meshing without any slip. In any pair of
gears, the smaller one is called pinion and
the larger one is called gear immaterial of
which is driving the other.

4.  Spur gears have their teeth parallel to the
axis and are used for transmitting power
between two parallel shafts. They are simple
in construction, easy to manufacture and
cost less. They have highest efficiency and
excellent precision rating. They are used in
high speed and high load application in all
types of trains and a wide range of velocity
ratios.

6.  Plastic, brass, steel, & aluminum are the
materials generally used for manufacturing
Spur Gears.

7.  17-4 PH Stainless Steel
 303 Stainless Steel
 Aluminum Anodized
 Brass Cast
 Polyurethane

8.  Gear hobbing
 Gear shaping
 Broaching

9.  Sequential cuts are made into the work piece
by the cutting tool
 Most widely used process for making spur and
helical gears
 Comparatively quick and inexpensive but
quite accurate
 Most of the gears of different types can be
produced with the help of this process

11.  Cutting tool itself is a gear
 Teeth are formed by meshing the cutting tool
and the blank together
 The cutter is generally made of ASP 2030
carbon graphite
 Spur gears, helical gears and internal spline

13.  In broaching the cut is made in one pass
making it very efficient
 This process uses a toothed tool called a
broach.
 A broach has a series of progressive cutting
edges
 The tool itself is very expensive
 Spur gears, helical gears , Internal spline,
slots

15.  Spur gears are used in many devices that you
can see all over, like the electric screwdriver,
dancing monster, oscillating sprinkler, windup
alarm clock, washing machine and clothes
dryer.
 A spur gear is one of the most important
ways of transmitting a positive motion
between two shafts lying parallel to each
other.

16. THANKS