Jaw chuck

A collet is a sleeve with a cylindrical inside and a conical outside. The collet has kerf cuts along its length to allow it to expand and contract. A threaded section at the rear of the collet is used to pull it into a matching conical socket. As the collet is pulled into the socket, the collet will contract - gripping the contents of the inner cylinder. Collets are most commonly found on milling machines, lathes, wood routers, and precision grinders. Collets can also be obtained to fit Morse or Brown and Sharpe taper sockets.

Typically collets offer far higher levels of precision and accuracy than self-centering chucks, and have a far shorter setting up time than independent-jaw chucks. The penalty is that most collets can only accommodate a single size of workpiece. An exception is ER collets which typically have a working range of 1mm. Air cylinders or collet chucks are made to hold cylindrical work, but are available to hold square, hexagonal or octagonal work pieces.

carbohydrates

Physical fitness is a good physical health and development using fitness equipments and exercises. It is a result of regular physical activity, proper diet and nutrition. It maximizes individual physical health, endurance, muscular strength and agility, body build, and physiology. It can be realized only through hardworking in exercise, diet, rest. Exercise should be hard and regular, but begun slowly and gradually increased in laboriousness. Aerobics exercises including jogging, cycling and the use of bodybuilding machines, sleeping should be restful and regular. A balanced diet is very essential, it includes bodybuilding supplements like carbohydrates, vitamins, proteins and minerals. Alcohol consumption is a counter productive for any physical fitness.