Simple indexing consists of a series of preset holes in a backing plate, these divisions are provided for the most common angles (such • ‘as 90°, 45° and 30°), The remaining divisions of a circle are provided by manually rotating the dividing arm using index plates. Calculations are required to use this method.

Description of the index table

This table is the one being calculated for the Index plate with hole number shown below.

SOME POSSIBLE USES OF A ROTARY TABLE

• Cutting gears
• Machining hex or square on a shaft
• Drilling holes at equal distances around a circle e.g. holes in a flywheel
• Used as an adjustable angle plate - e.g. machine one face then rotate 90° degrees and machine the next face
• Milling a radius or an arc
• Create wheels with spokes by using the rotary table to machine out the triangular shaped holes in a wheel