Jig:

It is a work holding device that holds, supports and locate the work piece and guide the cutting tool a specific operation

Fixture:

Rf is a work holding device that holds, supports and locate the work piece for a specific operation but does not guide the cutting tool.

1) Locators :

For holding the component, the designer should select the proper locators.

Types of locators

a) V – locators

b) Bush locators

c) Pin and button locators

d) Locating pins

e) Diamond pin locators

a) V – locator:

It is a method, generally used to locate circular and semi circular work pieces.

There are two types of v – locators

1] Fixed type

2] Adjustable v - locator

b) Bush locator :

• Bush locators are used to hold the work pieces like short, spindle etc.

• Material of bush – hardened steel.

• Bush locator is mostly used for drilling operation.

2) Clamping devices :

• Clamping is require to hold or clamp the job against the force acting on it at the time of machining.

• The clamp should hold the job tightly during operation.

• The clamp should not damage the job.

Types of clamps :

a) Screw clamp

b) Plate clamp

c) Hinged clamp

d) Swinging clamp

e) Quick action clamp

f) Power clam

a) Screw clamp :

• Screw clamp is simplest type of clamp.

• Screw clamp is simple in construction and easy to operate.

b) Plate clamp :

• Fig shows plate clamp, consist of a simple plate and screw.

• The plate can be tighten by using spanner, cams or hand operation.