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Welding gauge WGU-9M (Part Numbers)

Welding gauge WGU-9M

Welding gauge that enables dimension measurement of weld overlay, fillet, leg length, etc. and even undercut depth measurement all in one.
· Added measurement functions such as measuring plate thickness, weld bead width, round object diameter, and swelling of reinforcing steel forge welding.
· Supports new standards released by the Japanese Ministry of Land, Infrastructure, Transport and Tourism.
· The butt-welding discrepancies are step-measured with a bead straddling width of 53 mm, to widen the range of welding for thick objects.
· Beveling angle measurement possible over an 0-70° range.
· The undercut measurement function allows a more accurate measurement than conventional products by polishing the tip of the probe to increase the sharpness.
· Used to measure the size, angle, etc. of weld overlay and fillet.


Part Number

Configured Part Number is shown.


What is welding gauge

Welding gauge is used to measure and check size of welded part throat
thickness required strength split that may casue damage irregularity of
under-cut and overlap etc.

Terms of welding

  • Throat thickness
    The thickness from welded portion at triangular cross-section when welding two faces at 90°.
  • Arc strike
    The arc that occurred to parts other than welding base metal when working on arc welding.
  • Pit
    Blow hole on surface due to poor welding.
  • Bead
    A belt shape rises after working on welding.
  • Under-Cut
    The irregular groove at the toe of a rod in the welding base metal.
  • Overlap
    The heap results from miss welding of the base metal.

Instructions for inspection

Inspection itemsPictureInstruction for measuring
Reasons of welding crack
1.Surface crack
on bead
Visual inspectin in priciple
Inspection of exterior and shape on welding bead
2.Pit on welding bead surfaceVisual inspection
3.Unevenness on welding bead surface
5.OverlapVisual inspection
6.Size of corner buds (Lack of throat thickness • foot length of fillet)
7.Excessive buds from groove welding
8.Arc strikeVisual inspection
Part Number
Part NumberVolume DiscountDays to ShipMass
Material Feature 1 Feature 2 Feature 3 Feature 4 Undercut depth measurement
End legs length measurement and management of both high and low beads
Measuring of Throat Thickness of the Ends
Gap Measurement Instrumental
Measuring of Plate Thickness Measuring the outer diameter of round objects, measuring the swelling of objects after pressure welding, etc. Bead width measurement
Use Supported Diameter of Reinforcing Bars
9 Day(s) or more 190Stainless Steel (SUS420J2)Added measurement functions such as measuring plate thickness, weld bead width, round object diameter, and swelling of reinforcing steel forge welding.Compatible with new standards released by the Ministry of Land, Infrastructure, Transport and Tourism, the protruding welding discrepancies are measured with a bead straddling width of 53 mm, and the thick object welding range was broadened.Bevel angle / groove angle measurement possible over 0-70° rangeThe undercut measurement feature allows a more accurate measurement than conventional products, by polishing the tip of the probe to increase the sharpness.0–250–250~152~5RuleThe outer diameter of the round object is till φ50 mm0~53Measurement of weld overlay, fillet size and angle, etc. Measurement of pressure welding bulging.φ19~35


  1. 1

Basic Information

Measuring bevel angle / groove angle(°) 0–70 Measuring Level Differences(mm) Eye Bolt Stride Width: 53/Comparable Level Variance Measurement: 0-25

Please check the type/dimensions/specifications of the part WGU-9M in the Welding gauge WGU-9M series.

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