Fitting in Mechanical Engineering – Complete Notes

Important Tools used for Fitting in mechanical engineering diploma course. The notes shared in this website is collected from various locations, Which is purely made for those who studying mechanical engineering ITC, ITI, and Diploma Course.

Scriber: It is a piece of the hardest steel. It is used to mark the metal piece

Caliper: Calipers are used for taking measurements of the round jaw

Outside Caliper: It is a two-leg steel instrument with its legs bend inwards.  The movement of the legs can be controlled by the adjusting screws the legs are spring-loaded at the top end.

Inside Caliper: Construction features are similar to that of the outside caliper except that the legs are bent outwards. Inside calipers are used to measure the inside diameter and linear measurement.

Steel Rule: The steel rule is one of the most useful tools in the workshop for taking linear measurements of blanks and articles to an accuracy of 0.5mm to 1.0mm

Centre Punch: This is made of steel and is used for making holes, centers, etc. Its cutting angle is 60degree

Prick Punch: A prick punch is a sharply pointed tool made of steel. It is used to make small punch marks on the layout line. Its cutting angle is 40 degree

Try Suqre: Ots is used to make a line at a right angle to prepare the edge and also to check the flatness and square of the finished right angle.

Surface Plate: It is made up of grey cast Iron. The face of the surface plate is machined flash finished with very accurate limits. The surface plate is used to check the flatness of the surface and straightness of an edge and as a reference for making with a scriber block.

Chisel: The cold chisel is used for cutting and chipping away pieces of metal and are made of carbon steel, Usually of rectangular, hexagonal, and octagonal cross-section.

Flat Chisel: A Common purpose chisel is a flat chisel, which is used for chipping or chiseling the surface cutting the revet edge and it is slightly curved.

Cross-Cut Chisel: The chisel is used for cutting grooves and keyways. It has greater grips cutting that chisel.

Half Round Chisel: Half-round chisel is used for cutting oilways or grooves in bearings and pulleys. It is used for setting over the holes.

Diamond Point Chisel: This is made of square at the end, then beveled to make a cutting edge. It is used for cutting grooves and surface corners.

Side Chisel: It is ground beveled on one side only. It is used for cutting sideways. The flat chisel cannot be used.


The most widely used hand tool to be found in engineering workshops is a file. The file is hardened high-grade steel with raw of teeth. It is used to cut, smooth, and grind steek with raws of teeth. It is used to cut smooth metal parts. This is used for filing slots and grooves.


This is tapered in width and thickness. One of the most commonly used files for general work. They are also double-cut on the face and single-cut on the edges.


This is square in cross-section double cut and tapered towards the point. This is used for filing square corners. Enlarging square or rectangular openings and keyways.


They are round in cross-section and usually tapered. This is used for filing curved surfaces and enlarging round holes. They may be single-cut or double-cut.


This file is tapered double cut and the shape is that of an equilateral triangle. They are used for rectangular cuts and filing corners less than 90 degrees.


The tapered double cut and its cross section are in that shape. This is used for round cut and filing curved surfaces and half-round.


It is shaped like a knife tapered in width and thickness, They are double cut and used for filing narrow slots and groves.

Leave a Reply

Your email address will not be published. Required fields are marked *