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# Sketching from a Description (5 marks) You are working for the engineering firm 'Engineering Drawings R Us Ltd' and a client has come to you to...

Sketching from a Description (5 marks)
You are working for the engineering firm ‘Engineering Drawings R Us Ltd’ and a client has come
to you to discuss an idea for a bracket. The client has not taken ENGR101 and is unable to sketch
the bracket to explain the idea to you and has instead given the description below. From the
description on the next page, sketch the bracket in isometric at 1:1 scale.
The function of the bracket is to support a 20 mm shaft (rod). The overall length, width and height
of the bracket are 118 mm, 44 mm and 64 mm respectively. The base of the bracket is 118 mm x 44
mm x 16 mm. Looking from the top, the shape of one end of the base is curved to a 22 mm radius.
Towards this curved end of the base there is a slot so that the bracket can be bolted down with some
adjustability along the longest axis of the base. The slot runs along the length direction of the base
and is straight for 24 mm, 16 mm wide and has an 8 mm radius at each end. The centre of the slot’s
radius closest to the curved end of the base is concentric with the 22 mm radius that gives the base
its curved end. At the other end of the base there are two vertical supports, each 12 mm thick, 48
mm long and reach 48 mm above the top surface of the base. The support’s length direction is in
the same direction as the length of the base. Both supports have a face flush with the side of the
base and are flush with the square end of the base (flush means in plane with or hard up against).
The space between each support is 20 mm. 24 mm from the top surface of the base is the centre of a
24 mm radius that gives a curved top to the supports and meets two of the vertical faces at a
tangent. Also at this centre, each support has a 20 mm diameter hole drilled through them so that a
20 mm diameter shaft can be held by both supports.

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