Cork Institute of Technology
Higher Certificate in Engineering in Mechanical Engineering – Award
(National Certificate in Engineering in Mechanical Engineering – Award)
(NFQ – Level 6)
Autumn 2005
Manufacturing Technology-Workshop /Materials
(Time: 3 Hours)
Instructions
Answer FIVE questions. Question 1 must be
answered. Use separate answer books for each
Section. All questions carry equal marks. Use
annotated diagrams where applicable.
If you attempt Q2, please return the
equilibrium diagram with your answer book
Examiners: Mr .M. Daly
Mr. R. Kennedy
Dr. G. Kelly
Dr. D. O’ Mahony
Mr. S.P.O’ Sullivan
Mr. J. Connolly
Mr. R. Simpson
Section A
Q1. (a) A steel spindle is to rotate in a bronze bush and the bronze bush is to be held in the
housing shown in Fig. 1. The steel spindle measures 16mm in diameter. Calculate the
inside and outside diameters of the bush. (Note:- Bush not shown in the diagram).
(3 marks)
(b) Using the supplied sheet, write the upper and lower limits of the following:-
(i) spindle
(ii) inside and outside diameter of the bush, and
(iii) housing
Calculate the maximum and minimum allowances and state the type of fit achieved.
Note:- The spindle will be H7/g6 type fit in the bush and the bush will be H7/p6 fit in the
housing.
(11 marks)
(c) Briefly explain the method of production of the components and note any precautions in
regard to their assembly. (6 marks)
