Deep Throat Thickness Gauge

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This is a high quality product and performs as advertised, but not as easy to use or useful I first thought. It requires a lot of additional firearm knowledge to be a productive tool. Most specifications require convexity and concavity to be minimal, or to a specified minimum value. FAQs About Fillet Weld Gauges What Is A Fillet Weld Gauge? How you use a fillet weld gauge largely depends on what you’re measuring. Above in the article, we saw how to use a fillet weld gauge for measuring leg length, throat, concavity, and convexity of a fillet weld. Often, rather than making accurate measurements of these dimensions, a gauge is only used to inspect whether weld meets the specified values or not. Like a go/no-go gauge.

Different models will also use different styles of scale. Some snap gauges will use an indicator-type dial with a linear scale, whereas others use a plus and minus format. In these models, the gauge is zeroed off with limits set at either side (left side is negative, meaning the measured object is smaller than the desired size, whereas the right side is positive, meaning the measured object is larger than the desired size). If the object falls outside either side’s tolerance, it will fail inspection. Below are the main uses of Bridge Cam Gauge, How to Use it for different measurements are listed with reference to pictures.Welding gauge calibration is an important part of welding Quality Control & Assurance. It ensures that the welds meet the minimum weld size requirements & meet the required specifications. Commonly, gages are used to declare a weld as ok/not ok, rather than making precise measurements. The AWS gage serves this purpose well. Before measuring the welds using the fillet gauge- perform the visual inspection and decide the type of fillet weld for:

Then, place the gauge such that the beveled edges of the gauge rest squarely on the two adjoining surfaces of the fillet weld. The gap between the slider and the surface of the weld is a measure of the convexity. In this case, more gap means less convexity. Single-purpose weld gauges are fantastic if you know exactly what purpose you need the device for. The gage can be used to make rapid measurements on a large number of welds one after another. Either way, most fillet weld gauges require you to lay the gauge on your welding contraption. You will then look at how the weld lays across the gauge to determine the measurements. Do Weld Gauges Need To Be Calibrated? However, it is important to note that excessive convexity can actually have a negative impact on the overall strength of the weld, as it can create weld bumps that protrude outward from the surface.

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The main advantage of a concave fillet weld is that it is very strong and can support heavy loads. However, concave fillet welds are more difficult to create than other types of welds, so they are not always the best choice for every application. What is Convex fillet Weld? The figure shown above is a theoretical concept of a filler weld– represented by an equilateral triangle. You will notice that an actual fillet weld is difficult to achieve with this profile unless external grinding or machining is applied on the fillet weld surface. To measure fillet weld leg length, rest the legs of the gauge on the surface of the plate, then rotate the tip, to the toe of the weld. The actual leg length is read from this scale. This measurement should read one half of one inch or approx 12.7 mm.

There are other kind of gages available in the market too, that do not involve any slider in the instrument, and only involve putting the instrument on the fillet, and looking up a direct reading for measuring the throat size of the fillet weld. Similarly, for measuring the leg length on the vertical piece, position the gauge along the vertical part such that the gauge hugs the metal uniformly. Then move the slider such that it touches the horizontal metal. The extent of the movement of the slider can be seen on the gauge. This reading is the leg length of the fillet along the vertical base metal. Welders often strive to produce a convex fillet weld, as this type of weld face is typically seen as being more aesthetically pleasing than a concave weld face.

If the weld is not within specification, it will not meet the strength requirements, which could lead to a failure in the weld.

Primarily these comments are on erosion gauges in general, not this individual product. First you have to keep detailed records for a long time and you have to be firing a lot of rounds. You have to develop a technique of reading the gauge that is exactly the same each time. The depth reading you record can vary with the position of your head. Additionally the gauge doesn't really give you a failure point but rather a relative change over time. So you have to record your first reading then compare subsequent readings to get the relative change in wear. Since there really isn't any "failure" point, you just see slowly deteriorating accuracy. So unless you compare accuracy against throat erosion, then you don't really know what an individual reading means. Starting from the corner of the fillet, it is the maximum spread of the weld along the base and perpendicular of the right angled triangle that we just talked about above. See the illustration in the figure above. SM74 Armourer's plug gauge .306" - Barrel wear, - remainder of barrel life. No 1 Mk 1. Note: SM74 is for use in rifles and Bren machinegun.The AWS (Automatic Weld Size) gauge is considered a highly versatile tool. It is able to measure the size of your fillet weld, tolerance of convexity, tolerance of concavity, tolerance of underfill, and tolerance of reinforcement. If you want a great reliable gauge, the AWS is one of the best to get. Welders & Welding Inspectors use welding gauges to measure the weld size and to make sure that they are within the acceptance limit.