Holding Tools
Holding tools used in fitting shop comprises of basically vices and clamps. The clamps are C or G clamp, plane slot, goose neck, double end finger, u-clamp, parallel jaw, and clamping block. The various types of vices used in fitting shop are given as under:
1. Vices
The vices are hand vice, bench vice, machine vices, carpenter vice, shaper vice, leg vice, pipe vice, and pin vice.
1.1. Bench vice
Fig shows a bench vice commonly used in fitting shop for holding a variety of jobs.
1.2. Machine vice
Fig and Fig. shows machine vice with swivel base and parallel jaw machine vice. These types of vices are commonly used in fitting shop for holding a variety of jobs. They are used for precision work on the machine table like shaping, milling, drilling and grinding. They are generally made of grey cast iron.
1.3. Universal swivel base machine vice
Fig. shows a special type of universal swivel base machine vice made with swivelling head. It is commonly used in fitting shop for holding a variety of jobs. The jobs after holding in jaws can be adjusted at any angle either horizontally or vertically with the help of swelling head.
1.4. Toolmaker’s vice
Fig shows a small tiny vice known as tool maker vice. It is commonly used by tool maker, watch maker, die maker and goldsmith for holding a variety of small parts for carrying some operation.
1.5. Hand vice
Hand vice is shown in Fig. which is utilized for holding keys, small drills, screws, rivets, and other similar objects which are very small to be easily held in the bench vice. This is made in various shapes and sizes. It consists of two legs made of mild steel which hold the jaws at the top and are hinged together at the bottom. A flat spring held between the legs which tend to keep the jaws open. Its jaws can be opened and closed by a wing nut which moves through a screw that is fastened to one leg and passes through the other.
1.6. Pin vice
Pin vice is used for holding round jobs of small diameter such as wire and pins, during working. It also forms a very useful handle for small files. It consists of a handle and a tapered nose covering a small collet chuck at its end. The chuck carries the jaws which are operated by turning the handle. It is commonly used by a watch maker.
2. Clamping Divices
There are two types of clamps namely C clamp and tool maker clamp. A C-clamp is used for gripping the work during construction or assembly work. Whereas tool maker clamp is used for gripping or holding smaller jobs. Source A Textbook of Basic Manufacturing Processes and Workshop Technology by Rajender Singh.
