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6 marksSeals and Lubricants

CAPE Building and Mechanical Engineering Drawing Unit 2 · 2016 · Paper 2 · Question 4(a)

A design project requires paths for delivering lubrication to bearing surfaces with four proposed tasks: single inlet hole in bushing, circular groove in bushing, axial groove in bushing, and straight axial groove in the shaft.

Draw sectional views to illustrate any THREE of the specified methods for lubricating bearing surfaces.

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Other parts of this question

  1. 4(b)With the aid of a freehand sketch, illustrate the process of pressurized lubrication by means of a lip seal.[5 marks]
  2. 4(c)Give TWO side effects of over-lubrication of bearings.[2 marks]
  3. 4(d)Draw diagrams to illustrate the use of TWO of the following typical ball bearings: (i) Radial, (ii) Thrust, (iii) Angular.[4 marks]
  4. 4(e)State THREE factors that should be considered when designing bearing lubrication.[3 marks]

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