Drilling jigs are classified into following types.
1: Template Jig
This is the most simple in shape and easy to operate drilling jig. It can be used to drill many holes in the plate using a simple template plate..This type of jig is only useful when same work pieces are to be manufactured, other wise template can not be used to drill other work pieces.
2 : Plate Type Jig
This is the modified type of the template jig.Guide pins or bushes are used to guide the Drill. Work piece can be clamped through plates and holes can easily drilled.The plate jig is placed in such a way that accurate spaced holes with their position can be created.
3: Channel Jig
This type of jig have a channel. Work piece is clamped in the channel housing and fitted through the knob by screw fastening. Drilling operation can be performed through drill bushes.
4 : Open Type Jig
This is also simple in construction and easy to operate. In this type the work piece is fitted on the top of the jig and clamped through nuts and bolts.
5: Leaf Jig
This type of jig is same to the open type jig.The difference between the open type jig is only the top plate, which is placed to swing about a fulcrum point. In this type of drilling jig the work holding and loading/unloading of the work piece is very smooth and easy.Drill bushes are fitted into the leaf plate and guide the drill. This is also called latch or lid jig.
6: Box Type Jig
This is very special type of jig. When many holes from different sides are required, box type jig is used. Feet are provide to the jig to position the jig on the machine table. Top side of the jig is same as leaf type. Work piece is held in such a way that it created a box, so that it is called box type jig. Typical Box type jig is shown in the figure.
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