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State the features of Hand files -

Hand files -

Hand file

These files are similar to the flat files in their  cross section . The edges along the width are parallel throughout the length . The faces are double cut . One edge is single cut where as the other is safe edge . Because of the safe edge , they are useful for filing  surfaces which are at right angles to surfaces already finished .

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TRY SQUARE FEATURES -

TrySquare The Trysquare  is a Prescision  instrument Which is used to check squareness  (angle of 90 °) of a surface . The accuracy of measurement by a try square is about 0.002mm per 10mm length , which is accurate enough for most workshop purposes . The try square has a blade with parallel surfaces . The blade is fixed to the stock at 90° . Uses - -The try square is used to check the squareness of machined or filled surfaces . -Check the flatness of surfaces . - Mark lines at 90 ° to the edges of workpieces . (Trysquare made of hardened steel ) -try squares are specified according to the lengths of the blade ie.100mm ,150mm ,200mm .
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