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Cleaning tools, , Objectives : At the end of this lesson you shalll be able to, * state the different types of Cleaning Tools and their use, * state the precautions to be observed in the use of Cleaning Tools., , , , , , Mechanical Cleaning Involves, brushing and abrasive — Wire Brushes, Cleaning. It should be used very carefully on soft metals., Heavy deposits that exists even after chemical Cleaning, can be removed by mechanical cleaning., , Wire brushes are generally used for cleaning the work, surfaces., , It is made of steel wires (or) Nylon bristles fitted on a, , The General Cleaning Tools are, wooden piece., , 1) Wire brushes The steel wires are hardened and tempered for long life to, 2) Emery sheets. ensure good cleaning action. Different types of wire, brushes is shown in Fig 1., , 22, , , , Applications, 1 Wire brushes can be used for cleaning uneven Surfaces, , 2 Ahand wire brush can be used on exterior of the block, and on the head., , Fig, , 3. Around wire brush fixed with a hand drill motor spindle, can be used for cleaning of combustion chamber and, parts of the head., , , , 4 Awire wheel can be used to clean the valves. WIRE BRUSH WIRE WHEEL, , Nylon bristles with impregnated abrasive brush can, be used for Engine boring, , 6 Awashing brush can be used to clean the cylinders, by using Soap and Water., , 7 Oil passages of cylinder block can be cleaned by, running a Jong bottle type brush through all holes in fast Tw"sTED STRAND enisris wea, cylinder block., , 8 Itis used to clean work surface before and after welding, , Safety precautions, Steel wire brushes should be used carefully on soft metals., Itshould not make any scratches on the finished surface., , EMERY Sheet (Fig 2), , This is a type of paper used for sanding down hard and, Tough surfaces and also used for resistant technology sc NOME, (ARs0R FOR carson onus, purposes to give a smooth, shiny finish to manufactured, , products., , , , £2, a., , Emery paper is defined as a paper coated with abrasive, particles in one side and used to produce smooth, shiny, finish to manufactured products., , Description, , The each and every abrasive particle act as a cutting edge., The emery is considered for a suitable abrasive for, workshop practices and the final adjustment of steel parts, for a perfect fit. The emery papers also used for cleaning,, to remove rust from polished metal components., , The emery is graded by numbers and the Common sizes, , are from coarse to fine: 40, 46, 54, 60, 70, 80, 90. 100., , 420, F and FF. BRISTLE BRUSH CLEANING BRUSH, 7 ‘AND HOLDER. RIGID SCRAPER WITH NYLON BRISTLES:, , , , , , Safety Precautions CLEANNG TooLs, , After cleaning with emery paper, component