Mechanical World

Chisel: Chisel may be a metal tool with a sharpened edge at one end wont to chip, carve, or remove a solid material (such as wood, stone, or metal). It is a very useful tool. Types of Chisel: Following are some common types of Chisel: 1. Cold Chisel 2. Firmer Chisel 3. Bench Chisel 4. Butt Chisel 5. Pairing Chisel 6. Mortise Chisel 7. Dovetail Chisel 8. Corner Chisel 9. Framing Chisel 10. Slick Chisel 11. Chisels with a Crank Handel 1. Cold Chisel:  Cold Chisel A cold chisel is a tool made from reinforced tempered steel, which may cut any cold metal softer than itself. The name of the chisel comes from the fact that blacksmiths use it to cut metals when they are cold as opposed to when they are forged or heated. These cold chisels are used to cut off rivets and rusted nuts and were used massively when machine tools were not invented. Even today, they are used by metalworkers. 2. Firmer Chisel:  

Reamer: A reamer is a rotating cutting implement generally of cylindrical shape which is employed to enlarge and finish holes to accurate dimensions to previously formed hole. It is usually equipped with two or more peripheral grooves or flutes which may be parallel to axis (straight reamers) or in a right or left-hand helix (fluted or spiral reamers). It is a multiple edge cutting tool having the cutting edge on its periphery. Parts of Reamer: Following are the three main parts of Reamer: 1. Flute 2. Neck 3. Shank The fluted part consists of chamfer, starting taper, sizing section and back taper length. Chamfer length or bevel lead insures proper and easy entry of the reamer into the hole. The main cutting action of reamer is done by starting taper, the sizing section and to guide the reamers and also smooth or size the hole. The back taper reduces friction between reamers and the whole surface. Types of Reamers: Following are the common types o

  Bearings: A bearing is the basic element of any rotating mechanism. It helps a shaft to rotate. We can observe bearing in any simple mechanism, for example, the fan at our home, the mixture in our kitchen, our bicycle contain bearing inside it. There are various types of the bearings as per their application. Types of Bearings: Following are the types Rolling Bearings: 1.         Ball Bearings i.           Deep-Groove Ball Bearings ii.          Angular Contact Ball Bearings iii.         Self-Aligning Ball Bearings iv.         Thrust Ball Bearings 2.         Roller Bearings i.           Spherical Roller Bearings ii.          Cylindrical Roller Bearings iii.         Tapered Roller Bearings iv.         Needle Roller Bearings 1.         Ball Bearings:  Ball Bearing Ball Bearings utilize balls as the rolling elements. They are characterised by point contact between the balls and the raceways. As a rule, ball bearin