Height gauge

The left height gauge has the vernier scale, while the right one is an electronic height gauge with a digital readout.

A height gauge is a measuring device used either for determining the height of objects, or for marking of items to be worked on.

These measuring tools are used in metalworking or metrology to either set or measure vertical distances; the pointer is sharpened to allow it to act as a scriber and assist in marking out work pieces.

Devices similar in concept, with lower resolutions, are used in health care settings (health clinics, surgeries) to find the height of people, in which context they are called stadiometers.

Height gauges may also be used to measure the height of an object by using the underside of the scriber as the datum. The datum may be permanently fixed or the height gauge may have provision to adjust the scale, this is done by sliding the scale vertically along the body of the height gauge by turning a fine feed screw at the top of the gauge; then with the scriber set to the same level as the base, the scale can be matched to it. This adjustment allows different scribers or probes to be used, as well as adjusting for any errors in a damaged or resharpened probe.

In the toolroom, the distinction between a height gauge and a surface gauge is that a height gauge has a measuring head (whether vernier, fine rack and pinion with dial, or linear encoder with digital display), whereas a surface gauge has only a scriber point. Both are typically used on a surface plate and have a heavy base with an accurately flat, smooth underside.

References

Metalworking

Tools

Cutting machines	Bandsaw Cold saw Laser Miter saw Plasma Water jet cutter

Cutting tools	Broach Burr Chisel Counterbore Countersink End mill File Hand scraper Milling cutter Nibbler Reamer Shears Tipped tool Tool bit

Forming tools	Brake Die English wheel Hydraulic press Machine press Punch press Screw press Stamping press

Hand tools	Clamp Combination square Drift pin Hacksaw Hammer Hand scraper Machinist square Needlegun scaler Piercing saw Pliers Punch Scriber Tap and die Tongs Vise Workbench Wrench

Machine tooling	Angle plate Chuck Collet Fixture Indexing head Jig Lathe center Machine taper Magnetic base Mandrel Rotary table Wiggler

Measuring instruments	Bore gauge Caliper Center gauge Dial indicator Engineer's blue Engineer's spirit level Feeler gauge Gauge Gauge block Go/no go gauge Height gauge Machinist square Marking blue Marking gauge Marking out Micrometer Optical comparator Radius gauge Ruler Sine bar Straightedge Surface plate Tape measure Thread pitch gauge Vernier scale

Smithing tools	Anvil Forge Fuller Hardy tools Pritchel Steam hammer Swage block Trip hammer

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