sine bar

The sine bar is placed over the inclined surface of the wedge.

At this position, the top surface of the sine bar is inclined the same amount as the wedge.

When a sine bar is placed on a level surface the top edge will be parallel to that surface.

Angles are measured using a sine bar with the help of gauge blocks and a dial gauge or a spirit level.

A special type of sine bar is sine centre which is used for conical objects having male and female parts.

A sine bar consists of a hardened, precision ground body with two precision ground cylinders fixed at the ends.

They are used as a reference for the calibration of measuring equipment used in machine shops, such as micrometers, sine bars, calipers, and dial indicators (when used in an inspection role).

The surface plate is used in conjunction with accessories such as a square, straight edge, gauge blocks, sine bar, sine plate, dial indicator, parallels, angle plate, height gauge, etc.

Mechanical Engineering Laboratory: Main facilities of this lab include CNC machines (both lathe and milling machines), Toolmaker's microscope, profile projectors, sine bar and other measuring instruments.