Uses of vernier height gauge

 Vernier height gauge

. name the parts of a vernier height gauge

. the functions of each part

. llist out the specific uses of a vernier height gauge.

Specific uses of a vernier height gauge

Accurate measurements are  important in layout (marking off)and inspection work.

Vernier height qauges are particularly suitable for marking off accurate distance, and centre locations.

The graduations and readings are the same as those of a vernier caliper.

Parts of a vernier height gauge and their functions

The main parts of a vernier height gauge.

Base(1)

This is the datum from which measurements and settings are made. The underside of the base is hardened, ground and lapped.

Beam(2)

This is similar to the  beam scale of a vernier caliper and is attached to the base.

Vernier slide(3)

This unit slides on the beam and carries the vernier plate(5),locking screw (6),fine setting device (4) and scriber (7).some vernier height gauges are provided with a rack and pinion arrangement for moving the slide along the beam.

Vernier height gauges are provided with both straight and offset scribers.

Zero setting of the vernier height gauge

The offset scriber permits zero setting of the instrument form the datum surface. While using a straight scriber, the zero setting of the instrument is at a level above the datum surface. In this case the zero setting is to be checked using the precision round block, supplied along with the instrument. Vernier height gauges with which we can measure from the datum surface without the special offset scribers are also available.

The size of the vernier height gauge is stated by the height of the beam. The most commonly used size has a beam of 300mm height.

Vernier height gauges are used with surface plates or  other accurate flat surfaces.