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Class 2 (2nd Engineer) MEKG 📅 Jan 2021

Exam Question

With regards to main transmission shaft flange coupling arrangements:

(a) Sketch a hollow type coupling bolt and the hydraulic head/nut and loading rod which are used to fit it;

(b) Describe how the bolt is fitted.,

(c) State the advantage of the hollow coupling bolt as compared to the traditional type of coupling bolt.

Exam question diagram

Reference Answer

(a)
(b) The process of fitting a hollow coupling bolt into the main transmission shaft flange coupling:
A bolt with a diameter slightly larger than the flange coupling bore diameter (D + 0.00025D) is selected.
A push rod (loading rod) is inserted into the hollow coupling bolt, and a hydraulic head is attached.

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