2.Assignment should not be hand-written and must be typed. Untidy assignments (subjected
to the marker) will not be marked. Grammar is worth 10%.
3. You are only limited to 5 one-sided pages for your design report including the
manufacturing drawings. If a report is more than 5 one-sided pages, only the first 5 one-sided
pages will be marked.
4. A proper cover sheet must be used for the Assignment. Reports not in pdf format will not be
marked. The design report must be typed.
5. References must be provided whenever appropriate. Marks will be deducted if references
are not given.
A chain drive is required in a machine that crushes nuts. The chain drive system is to
transmit power over a distance (centre distance between sprockets) of at least
500mm and to achieve a speed reduction ratio of 3:1. The input power for the chain
drive is supplied by a motor that produces a power of 25 kW and turns at a revolution
of 1500 rpm. The machine is used in an environment with limited space and where
human traffic is considered significant.
a.) Specify the steps clearly and proposed a possible design specifications for the
chain drive system.
b.) Design a suitable guard for the chain drive system. The machine and the chain
drive system is mounted on a table as shown in the schematic layout below.