Throat size measurement is used in ISO & British inspection standards while leg length is used in AWS (Americans) & CSA (Canadian) welding inspection standards. Bridge Cam Gauge is a versatile gauge as with one single gauge you can perform many tasks, such as: Also it's an odd shape, I thought it would fold or disassemble to fit in a smaller slot in my tool box. As previously mentioned, caliper gauges are supplied with either dial or digital readouts. Digital caliper gauges will always be the most accurate type, given that the display can be up to 3 decimal places and eliminates human error when reading the scale. Dial caliper gauges are also supplied with different graduations depending on the level of accuracy required.

A profitable service that every gunsmith should offer to shotgun shooters. Re-working an improper chamber with the Walker Gauges and proper chamber and Forcing Cone Reamers can reduce recoil, shot deformation, and improve patterns. The system was developed and proven by the late Ralph Walker, Selma, Alabama, gunsmith, writer and author, who had used it in his shop. Visual aids (magnifying glass, torch) and gauges are used to support the detection of welding discontinuities and to measure the size of welds in fabrication companies. 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.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? First find out the expected fillet size of the weld, by referring drawing or any other technical document. For example, for the Bridge Cam gauge from Gal Gage, it’s good to use their calibration services. The calibration is carried out for: SM134 Armourer's plug gauge .301" - Bore accept - Bore straightness - gauge must pass freely through entire barrel held vertically. 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.

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. 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. 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. Then study the article (especially the last paragraph of the "Gas erosion at throat" section) to understand that it's the relationship of the seated bullet to the leade that's critical for discouraging the projectile from yawing in the throat. And finally, to measure undercuts or pits, place the legs of the gauge squarely on the surface of the plate and lower the tip into the undercut or pit. The amount of undercut is read from this scale. This pit reads 1/16 of one inch or approx 1.6 mm. Watch this video of the Bridge Cam Gauge

Measuring Tools - Barrel Wall Thickness Gauges

If the weld is not within specification, it will not meet the strength requirements, which could lead to a failure in the weld. The following steps hold good for the gauges shown in the pictures. There are of course other kinds of gauges available as well in the market.

A mitre fillet weld is a weld with a triangular cross-section. It is strong but needs weld flushing to produce mitre weld. For special applications, it is used to join two pipes at an angle. 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. Before measuring the welds using the fillet gauge- perform the visual inspection and decide the type of fillet weld for: To measure weld reinforcement, lower the legs of the gauge to the surface of the plate. Then, using the tip, place it at the highest point on the weld. The Weld reinforcement dimension is again read from this scale. This weld reinforcement measures 1/8 of one inch or approx 3.1 mmWe all know someone with a .303 rifle, or own one ourselves. In fact I believe all new FAC holders should get out and shoot one at some point, just because. I have a modest collection of .303 Sporting and military rifles, including Lee Speed and postwar No1Mk3 commercial examples here in the armoury along with later ones such as the 1920 Lithgow below. A caliper gauge is primarily used to measure the distance between two internal or external points in a workpiece, object or feature. Example uses for this type of gauge is in the measurement of bores, grooves and shafts.

Adjustable fillet weld gauges are great because they are convenient and do not require you to carry around as many tools. How to Use a Fillet Weld Gauge The leg length refers to the distance from the root to the toe and should be measured in both directions using fillet gauges. The fillet weld measurements are carried out using two approaches: Once the gauge is positioned thus, move the slider in the gauge such that it touches the vertical base metal. The extent of the movement can be seen on the scale that is imprinted on the gauge. This reading is the leg length on the horizontal part.

Measuring Tools - Thermometers

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. Generally, the gauges in today’s market come imprinted with values on the surface of the gauge. The gauges are single piece items, made up of stainless steels, and can be put to rugged use to make a large number of inspections before the gauge becomes worn out and not accurate enough. The gage is then simply replaced with a new one, as these gauges come at affordable prices. What Fillet Weld Gauges Do Professionals Use?