Sealey Vs518 Spark Plug Feeler Gauge - Metric

Product Information

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. 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.

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

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. 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.

We are sure now you have learned properly how to read a feeler gauge. This tool is produced and tested according to specific standards. 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. To alter the spark gap, twist a little, the ground electrodes away or toward the center electrodes. Step 3: Now Use Any Other Tool if Required 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.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. 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. 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: Gauges have multiple uses in automotive manufacturing work. Many machinists use these types of gauges daily, and a mechanic cannot be without a set of tune-ups. Whether you are looking for that perfect spark plug gap or precision in your parts, feeler gauges, used effectively, can be a must.

In a similar way to the previous case, we use the gauge to measure the external diameter of a male thread or the internal diameter of a female thread, taking into account the following detail: The OEM Tools Blade Master has 26 calibrated blades that can measure sizes ranging from 0.0015 to 0.025 inches. You can get the exact value of the gap in either SAE or metric system (inches and millimeters). The measurements are laser etched in the middle of each blade. The blades are made of hardened tempered steel, which is long-lasting and resistant to rust and corrosion.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. 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.

To learn more about the other varieties of gauges, see our related guide covering the types of gauges. What is a Feeler Gauge? The fan-shaped model is often used to manufacture and maintain automotive aviation equipment. However, as explained above, it can also be used in the measurement of car spark plugs. How to Gap Spark Plugs with Feeler Gauge? img source: apex-pitbikes.de 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.The CTA Tools Spark Plug Gapper has a heavy-duty construction built for strength and durability. It’s made up of a die-casted metal to harden the steel and increase the accuracy of the unit. It can be used for measuring and readjusting the spark plug gap. The gauge is calibrated in the imperial system, and the size markings are laser etched on the rugged steel construction. 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. 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. 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. 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