Sealey Vs518 Spark Plug Feeler Gauge - Metric

Product Information

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. 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. Achieve better spark plug performance. The size of the gap of a spark plug determines its firing performance. The gapping tool will help you manually open the gap to the exact factory measurement recommended in your owner's manual. That way, you boost the efficiency of the spark plug in putting out a large enough spark to ignite the air and fuel mixture in your engine.

By using the feeler gauge to examine the gap of spark plug meets the spec for your car or any other vehicle. You have to adjust the gap of the spark plug from its out-of-the-box state. Step 2: Twist Ground Electrode All feeler gauges are somewhat thin. This is because the point of them is to fit into and measure gaps that are far too narrow for most other common measuring tools, such as tape measures. To learn more about the other varieties of gauges, see our related guide covering the types of gauges. What is a Feeler Gauge? Setting the spark plug gaps with a feeler gauge determines how well your vehicle performs. An auto mechanic uses a caliper to measure the distance between two surfaces. 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: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.

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. 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 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

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. The number of blades or leaves – Different feeler gauge sets will feature different numbers of blades. On the low side, 10 or less, with 13, 15, 25, 26, 31 being more common blade counts, all the way up to over 100. There are models in different formats (for example, with single blades or in the form of a roll) and also the radius calibrators used to measure concave or convex rays. 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 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.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 already have a spark plug gap tool, but sometimes small-sized pliers, wrenches, or mallets also can be used to correct that gap slightly. Step 4: Place Gauge Between Electrode 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. 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.

We are sure now you have learned properly how to read a feeler gauge. This tool is produced and tested according to specific standards. 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 Both instruments are very useful for toolmakers, mechanics, automatic lathes operators, modelers, and professionals in related fields. How to Read a Feeler Gauge- 5 Steps Process img source: axminstertools.com 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.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. But it is not the only function they perform: they also take care of alleviating the heat which is generated in the combustion chamber to the cooling system. A blade feeler gauge is probably the most common type of gap gauge you will encounter when shopping for these tools online. They usually feature a range of graded flattened metal shims or leaves which are designed to fold in or out of a central case or sheath. The most common type of feeler gauge, called a straight leaf or straight blade gauge, consists of straight blades of uniform width constructed of high carbon steel sold in a set to cover specific dimensional values. However, there are variations on this standard that serve specific purposes. English vs. metric sizes – Feeler gauge sets are available in both decimal inch sizes and decimal millimeter sizes.