Mechanical tools

State the preventive to be taken for protecting precision measuring instruments  Precision measuring instruments play an important in maintaining the quality of the products.Measuring instruments are also very expensive. It is important that the instrument are well looked after and maintained by the person who uses it. Protection against corrosion  High atmosphere humidity and sweat from hands can cause corrosion to instruments.Avoid this. Acid-free Vaseline (petroleum jelly) applied lightly on the instrument can give protection against corrosion. Be sure that the instrument are thoroughly cleaned and free from water or moisture before applying Vaseline. Use chamois leather for giving the light coating of Vaseline. Always clean the slip gauge with carbon tetrachloride and apply petroleum jelly after use. Remove burrs and metal particles.Burrs on work pieces can use scratches and damage other workpieces. Metal or other particles between the measuring faces of slip gauge will ma...