Linear Angular Measurement (LAM) gauge

From TWI - world centre for materials joining technology

Linear angular measurement gauge The LAM gauge has been designed specifically for measuring depth and angle for remedial weld grinding. Developed by a commercial diver-inspector in conjunction with TWI, the LAM gauge is invaluable for both underwater and topside use.

It provides linear measurements up to 40mm deep and angular measurements of up to 65°.

Although designed specifically for taking grinding measurements, the LAM gauge is a versatile, multi-purpose instrument capable of providing many frequently needed measurements. These include:

Welding grinding depth and angle
Pitting depth
Angle of preparation
Misalignment
Fillet weld leg length
Fillet weld throat
Excess weld metal
Undercut
Indentations
Protrusions
Profile of damaged areas in members (using a steel straight edge)
Checking excavation depth in weld repairs
Linear measurement parallel to member surface, e.g. root gap
Measurements can be taken from flat or curved surfaces

The LAM gauge comes complete with:

An easy-to-follow instructions leaflet

Cosine conversion tables for flat and curved surfaces

Pictorial diagrams showing other uses

A carrying pouch for use by divers and topside inspectors

A heavy-duty protective plastic case for ease of storage/transportation

Please note that the LAM gauge is intended for general dimensional inspection of welded fabrications where close tolerances are not expected. It should not be compared in precision with gauges used for measuring machined components. Where a high degree of accuracy is required, machine shop type measuring instruments will need to be used.

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