JABATAN KEJURUTERAAN MEKANIKAL
DJJ50203
TROUBLESHOOTING & MAINTENANCE
FOR MECHANICAL COMPONENTS
EXPERIMENT 1
TITLE : CHAIN DRIVE & BELT DRIVE
SYSTEM
LECTURER NAME : EN SAIFUDDIN BIN ABDUL RAHMAN
NAME REGISTER NUMBER
MUHAMMAD ZULHILMI AIMAN 13DKM20F1076
BIN AFIZUL
MUHAMMAD SYAKIR ZUFAYRI BIN 13DKM20F1080
HAMZAH
MOHAMAD FIRDAUS BIN ROSI @ 13DKM20F1125
MOHD RADZI
1.0 OBJECTIVE
a) To practice the chain drive and belt drive installation method
b) Chain and belt alignment
c) Speed ratio calculation
d) Engineering measurement
2.0 THEORY CHAIN DRIVE
A chain is a series of pin-connected links used to transmit electricity. Large tensile
pressures may be transmitted through the chain while still being flexible thanks to the
design. The chain engages sprockets, or matching toothed wheels, to transfer power
between spinning shafts.
The most popular form of chain is a roller chain, which has extremely little friction
between the chain and the sprockets thanks to the roller on each pin. A variety of
extended link designs, typically employed in conveyor applications, are among the other
varieties.
Roller chain is classified by its pitch, the distance between corresponding parts of
adjacent links.
3.0 THORY BELT DRIVE
In belt drives, power is transmitted between at least two pulleys by a belt. One pulley drives the
belt (driving pulley) and the other pulley is driven by the belt (driven pulley). In belt drives, the
speed is often reduced, so that in these cases the smaller of the two pulleys is the driving pulley.
Without exception, the most important factor in the successful operation of a V-belt drive is
proper belt-tensioning. To achieve the long, trouble free service associated with V-belt drives,
belt tension must be sufficient to overcome slipping under maximum peak load. This could be
either at start or during the work cycle. The amount of peak load will vary depending upon the
character of the driven machine or drive system. To increase total tension, merely increase the
center distance. Before attempting to tension any drive if is imperative that the sheaves be
properly installed and aligned. The V-belt slips, it is too loose. Added the tension by increasing
the center distance. Never apply belt dressing as this will damage the belt and
cause early failure.
4.0 APPARATUS
CHAIN
BELTING
SPROCKET
V-BELT PULLEY
MOTOR
TACHOMETER
PROTECTION
METER
POWER SUPPLY
5.0 PROCEDURE
a) Fundamental engineering measurement Before beginning to install the chain drive
system, bof chain must be understood.
b) When the same gauge of sprocket is put on the system, the outer diameter is utilised
to calculate the speed ratio of the system.
c) A 20-tooth motor shaft sprocket and a 36-tooth gearbox side sprocket are attached.
d) The two sprocket faces are aligned using a steel ruler.
e) The central sprocket's 15 teeth are levelled, and the chain's tension is adjusted such
that it deviates from a straight line by 5 to 20 mm.
f) The housing screw and spur screw are secured.
g) Before operation, a safety protection cover is put on the belt drive assembly.
h) Chain speed ratios according to theory. Z2/Z1=I, pulley ratio, N1/N2=
I The invention panel turned on and was powered by a 10 Hz power supply.
j) A tachometer is used to gauge the speed of chains with 20 and 30 teeth, respectively.
6.0 RESULTS CHAIN
Inventer Chain 1’s Chain 2’s Theoretical Chain 1 Chain 2 Actual
Frequency number of number of speed ratio speed N1 speed N2 speed
teeth teeth T2/T1 ratio
N1/N2
Hz 20 30 Nil rpm rpm Nil
5 20 30 1.5 296.1 197.7 1.498
10 20 30 1.5 592.1 395.8 1.496
20 20 30 1.5 1188 789.1 1.506
30 20 30 1.5 1767 1180 1.497
40 20 30 1.5 2366 1537 1.539
7.0 RESULT BELTING
Inventer V-belt V-belt Theoretical Chain 1 Chain 2 Actual
Frequency pulley 1’s pulley 2’s speed ratio speed N1 speed N2 speed
diameter diameter T2/T1 ratio
N1/N2
Hz Nil rpm rpm Nil
5 295.5 146 2.024
10 590 295 2.000
15 885 440 2.011
20 1195 584 2.046
25 1490 723 2.061
8.0 DISCUSSION
Although there were discrepancies between the theoretical and experimental values of
the chain tension ratio, it is clear from the findings above that the experiment results
show the correctness of the formula.
The technique, environment, and human error that result in differing results are the
reasons why the speed ratio is different from the real speed ratio.
9.0 CONCLUSIONS
One of the most popular methods of power transfer in mechanical engineering is the use
of chain drive systems. They can move power from one location to another with or
without changing the torque or angular velocity. The ability to transmit power over a
substantially wider distance with a chain drive transmission gives it a significant
advantage over gear drive transmissions.
Chain drives also convey greater power as compared to belt drives. Additionally,
compared to belt drives, they put less strain on the shafts.
10.0 REFERENCES
a) https://www.coursehero.com/file/p1vbl4h5/Conclusion-Chain-drive-mechanisms-
are- one-of-the-most-widely-used-mechanism-of/
b) https://www.scribd.com/document/319057585/Report-Roller-Chain
c) https://en.wikipedia.org/wiki/Chain_drive
