The Combination Set

The combination set is a set with three tools and has several uses. It consists of a blade which is graduated in inch and metric scales. The head slides along the blade and can be fitted at any desire place. The central groove accommodates the clamping screw fitted to each head. The head slides in a central groove on the blade can be used as a rule separately.

FIGURE

The following are the three heads that are made of close grained cast iron.

The Square Head: It is provided with two working faces at 90^o and 45^o to the blade thus enabling it to be used as a square and as a mitre. The spirit level in the stock head makes it convenient to square a piece of material with a surface and indicates level at the same time.

The Centre Head: It is used in conjunction with the blade to locate the centre of shafts or other cylindrical work.

The Protractor Head: It is used to check or set any angles up to 180^o. The spirit level is often incorporated with 1^o accuracy.