Sealey Vs518 Spark Plug Feeler Gauge - Metric

Product Information

For this reason, it is essential to ensure that we properly identify the threads with which we are dealing, and for this purpose, it is convenient to follow a simple methodology to read a feeler gauge. 01. Determine if the Thread is Male or Female

If we repair a pipe without knowing how to identify the type of thread in a pipe connector, we will be in trouble. Installing the wrong type of connector can ruin the thread or cause anything from tiny water leakage to considerable gas leakage, with the associated risk. The sizes range from 0.02 to 0.1 inches with 0.01 increments, and they are easy to read. The gapper is also designed with a key ring hole or a spark gap opener with a 7/16 inch diameter. The hole helps you accurately resize spark plugs with an electrode tool included. The tool can measure the clearance of any spark plug model. Within the blade variety of gauge, some variations include changes to the blade length (long blade and short blade feeler gauges) as well as bent blade (also called offset) gauge sets. The bent blade gauge set can provide for easier use in space-constrained applications and for use in areas with restricted movement and access to the gap being measured. There is also a tapered blade type of gauge set, wherein the width of the blade becomes progressively narrower towards the blade tip, which again, can prove valuable when there are space limitations involved in the work area.

Types of Spark Plug Gap Tools

The specific feeler gauge sizes included in a set depend on the number of blades in the set as well as whether the feeler gauge set is an English or metric size set. A representative set of feeler gauge sizes for a decimal inch set is shown below in Table 1, and a decimal millimeter size set is shown in Table 2. These are based on a 25-blade count set – other blade combinations and sizes are available. This tool makes gapping plugs a lot easier compared to tiny plug gapping tools, and you can get a good grip on what you're doing. It's a simple but functional device, and it's comfortable to use with no rough edges. The gauge is also very accurate, and the adjustment hole is useful for widening the gap. It is also simple to make small adjustments because it provides a lot of leverage, so you don't need to press very hard. Below, we have listed some of the most common types, materials and models of feeler gauges. Most are available either as full sets or as individual blades. Wire Type Feeler Gauges You can buy shorter or longer versions, with short ones tending to measure about 75mm in length. Long feeler gauges are less common but still quite widely used for specialised applications, particularly in engine maintenance and repair. These models can be anywhere between 8 inches and 2 feet in length. Metric and Imperial Feeler Gauges

This measurement will give us the number of threads per inch on UNC, UNF, NPT, BSPP, and BSPT threads, and the distance in millimeters between two consecutive ridges on metric threads. Mechanical assemblies such as machines are built up from a series of mating parts. The fit of those parts is often designed to be within a specified tolerance that assures reliable operation for the machine – for example, the fit of a piston into the cylinder of an engine. If there is too tight a fit or clearance between the piston and cylinder, the engine may suffer from excessive wear and friction, shortening the life of the unit and resulting in maintenance costs and downtime. If the gap or clearance is too wide, combustion gases may escape during compression, reducing the engine performance. To make certain that gaps and clearances are within specified limits, engineers, mechanics, and machine operators rely on the use of measuring devices such as a feeler gauge. This article covers what feeler gauges are, the various types that exist, the gauge sizes, and provides some examples of typical uses for these instruments. The fan-shaped gap gauge is used in the manufacture and maintenance of automotive aviation equipment, etc., Made of tempered alloy steel. Slope Calibrator on Spare Blades A feeler gauge is a tool that is used to measure gap width. Here in the following guide, we are going to learn how to read a feeler gauge. Gauges establish a distance between two points. The device consists of multiple sheets or wires sized to exact dimensions marked on the surface of each blade or at the base of each cable. It is mainly used when measuring the gap between the segment ring and the piston of an endothermic combustion engine or the gap between two gears.Blade length – Standard blade lengths are typically around 3-5 inches, but long blades might be 12 inches and shorter blades around ¾ - 1 inch. For working with very delicate or easily scratched materials, you may be better off with a plastic feeler gauge than a metal one. The same is also true if you are working in environments where a metal version might corrode, conduct electricity, or cause sparking.

A wire-type feeler gauge is a little different to the standard shim arrangement. Instead of featuring a series of graded metal leaves or blades, the wire feeler gauge instead has a series of rigid metal wires. The best feeler gauge for a given application will depend mainly on the size of the gaps you are measuring, how durable you need the gauge to be, and what sorts of materials or parts you are measuring gaps between.Angled feeler gauges are ones whose tips are bent over at a slight angle to the rest of the blade. This can be handy for accessing harder to reach gaps, where it may not be possible to slide a standard gap gauge in straight enough to get a good reading on the width of the opening. They are also known as offset feeler gauges. Feeler Gauge Sets However, for many standard engineering and mechanical applications, tempered or stainless steel is often the preferred material. Brass can also be a good option if you need something durable, but somewhat softer and less likely to scratch than steel. Prevent burnt electrodes. Used spark plugs may have a slight discoloration at the electrode (negative probe). Further inspection may reveal that the gap between the ground electrode and the center electrode is wider. If the gap is not properly aligned, the electrode will continue to discolor and will eventually burn away. Blade material – As mentioned carbon steel blades are commonly used, but other materials such as brass, stainless steel, and even plastic blades are available. Brass has the advantage that it will not precipitate a spark while in use, valuable for applications where explosive atmospheres might exist. Brass is also is non-corrosive and non-magnetic, desirable properties in uses such as electronics. Stainless steel can resist high temperatures, and plastic is non-corrosive, non-sparking, non-marring, and non-magnetic. Some of the gauge sets will offer blades of more than one material in the same set, such as steel and brass together. Did you know you can easily gap spark plugs using a feeler gauge? Follow these steps: Step 1: Examine Gap Meets Specifications

Some of the most common sizes you will likely find yourself using include 1mm, 1.5mm and 2mm feeler gauges. However, the ones you tend to use the most will of course depend largely on what type of work you are doing. Are you confused about how this instrument works? See the step by step below, where we use as an example the measurement of a spark plug: If the thread is cylindrical, we measure any thread from crest to crest. Whether the thread is tapered, we measure the fourth or fifth thread from crest to crest. 04. Measure the Pitch of the Thread We are sure now you have learned properly how to read a feeler gauge. This tool is produced and tested according to specific standards.Measurements that involve the use of a feeler gauge are generally very small and are always very accurate. Auto repair technicians need accurate gap measurements when working with spark plugs, distributors, or valves. Place the gauge in the hole in the tip of a spark plug. Use the size indicated for the size of the gap, according to the manufacturer. If the gap is too wide, adjust the spark plug so that the feeler gauge is tight but can slide in and out of the gap freely. If the gauge does not fit, increase the gap enough so that the gauge fits snugly. Manufacturing Use The CTA Tools Spark Plug Gap gauge is made up of a strong and durable all-steel construction built to resist corrosion. It’s a circular gauge with easy-to-read, laser-etched sizes on its body in sizes ranging from 0.025 to 0.060 inches with 0.005 increments. Nine wire rings on the gauge's outer edges help you to accurately measure, increase, and decrease the gap size. There are several ways to measure the pitch of a thread, although in the case of pipe threads, the most convenient is by using a thread gauge. 05. Identify the Thread As well as, when repairing or replacing spark plugs, a technical service center measures or establishes the distance between two electrodes by using a feeler gauge.