The Best Bore Gauge for Precise Measurements

The Best Bore Gauge for Precise Measurements

A bore gauge is a tool of choice for many professionals regarding precise measurements. There are a variety of bore gauges on the market, so it can be difficult to determine which one is right for you. Bore gauges come in various shapes and sizes. We’ll explain the differences between them in this post to make an informed decision.

Bore gauges are measuring instruments that are often used to measure holes precisely. These precision instruments can be challenging to use at first. Still, they can be extremely useful when doing a certain task. You’ll need to calibrate them before you use them, but it’s worth it in the end.

Dial or bore gauge calculates the size of a bore. This gauge has three symmetrical anvils that stick out from the gauge’s body. The anvils are attached to a dial or micrometer device.

When the handle is turned, the anvils are moved in or out according to the dimensions.

The knob on the device is usually slippery so that it feels the same each time it is used. The measurement given is the average diameter of the three anvils, and it is usually accurate within .001 millimeters.

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Fowler X-tender-E Electronic Dial Bore Gage Gauge Set

Accusize Industrial Tools Bore Gage

Mitutoyo 511-932 Dial Bore Gauge

Anytime Tools Dial Bore Gauge

The Five Best Gauges for Precise Measurements

This gauge is 15 x 7.5 x 2.2 inches and weighs about 2.3 pounds. It can measure between 7.878 and 8.27 inches, with an accuracy of +/-0.00006 inches.

The Bowers Versatile Tool has many features that make it a great choice for versatile measuring. It has a depth of 3.15 inches and a resolution of 0.00001 inches, making it perfect for precision measurements. Additionally, it uses Bower’s FastFit measuring heads with constant spring pressure for repeatability, ensuring accurate measurements every time. Plus, its three-point contact system makes it ideal for detecting triangular form errors.

This tool is durable because it has ceramic contact points. It also stays stable when it gets hot because of thermal expansion. You have to connect it to a Sylvac or multiplexer display unit to use this tool.

Some people have said they received incomplete kits. Additionally, they state that the instructions were not in English and that the kit should be used only if tolerances of less than.001 are required. The kit measures 12 x 6 x 4 inches.

This dial bore gauge is good for measuring bores up to 10 inches deep and have a diameter of 2 to 6 inches.

This tool features a graduation of 0.0005 inches for precision. Additionally, it offers contact sites for interchange. This tool’s dial indication is made of jeweled bearings. This tool also comes with an ABS storage case to keep the tools in order.

This tool can help you measure the taper of cylinders and the out-of-round condition without removing the pistons.

This gauge has a design that is comfortable to hold and easy to use. It also has contacts that last a long time.

This anvil is laser-marked for easy selection. It is 15.6×5.4×5.5 inches, and it is a great addition to your bore gauge kit. According to its technical specs, it has a repeatability of 0.0001 and an accuracy rate of 0.0005.

You also get a sturdy aluminum case and accessories when you buy this tool.

This gauge reports the range between 2 and 6 inches, with a bore depth of 6 inches and precision graduation of 0.0005 inches. It comes with a gauge that has interchangeable contact points.

This tool helps measure tapers of cylinders and the like without removing the pistons. It is easily adjustable with fast and easy metric conversion.

You also get a free storage case to keep the tool and its accessories together when you buy the tool.

The Best Bore Gauges

If your car engine doesn’t work as well as it used to, you might need to replace it. But before you do, it is important to know the exact measurements of the engine components.

You can use a bore gauge to measure the depth and diameter of the bore. Not all bore gauges are the same, so it is important to use a good one. We have compiled a list of good bore gauges so you can find the right one for you.

You can use this tool to measure the size of your engine’s cylinders. This will help you determine the taper and out-of-round measurements.

Benefits of a Bore Gauge

This high-precision tool can be used for many things. People usually use it to measure the size of car cylinders when they are looking for replacement parts. With this tool, you can get the exact measurements, which is impossible with traditional methods.

Versatile Applications

This device can be used to measure the taper of the cylinder. This means whether the cylinder is wider at the top or bottom.

The out-of-round measurements can determine if the cylinder is round or oval. It can also measure the size of the outer diameter of the hole.

Accurate Measurements

Most vehicles today have very tight clearances between different parts. This means that if you get a replacement part that is not the exact same size as the original, it might not fit correctly. To make sure you get a part that will fit, use a bore gauge to measure the size of the hole accurately.


This device usually comes in a compact size. You can choose between an analog gauge or a digital gauge. Analog gauges are easy to read, but you can always go digital if you don’t like looking at the dial indicator. It all depends on your preference!

How Many Parts Has the Dial Bore Gauge

You need to know some basic things before purchasing a bore gauge. Make sure you understand what each part of the gauge does since this will be helpful when using it.

  1. Dial Indicator: It is helpful to read the measurement.
  2. Adoption Screw: If you want to change your dial indicator, you can unscrew the adoption escrow part and easily replace it.
  3. Grip. You can control the bore gauge by adjusting the part.
  4. Gauge head: The gouge head is the last part of the saw. This part has a few parts that make it sad. They are described below.
  • Anvil: This part contacts the wall of the hole. There are two parts: an interchangeable anvil and another moveable anvil.
  • Centering contact: This part also contacts the bore’s wall and helps the anvil stay in the correct position.

Difference Between Dial Indicator and Digital Indicator

These days, there are two types of dial bore gauges: those with dial indicators and those with digital indicators.

  1. Dial indicator and
  2. Digital indicator

Both indicators offer the same features. But there are some quiet differences that you should know about.

Dial indicators can transfer the result to another device like a pc, smartphone, or laptop. On the trisection, there is no need for any wire. You can use Bluetooth in this case.

A digital indicator is better than a dial indicator because it is easy to set up and does not require you to calculate anything.

Digital indicators are a good choice if you need to save time. However, they can be a bit expensive.

Best Bore Gauge Review

1. Fowler X-tender-E Electronic Dial Bore Gage Gauge Set

One of the best products that Fowler makes is this bore gauge, which is extremely precise and simple to use. It has a digital display, which is ideal for people who prefer not to use analog gauges.

Large holes and cylinders can be measured with this measuring gauge. It is also capable of measuring a depth of up to 10 inches. In order to measure accurately, it uses a gradient spacing of 0.00005 inches.

With this electric bore gauge, you have the option of measuring in inches or metric units. It also has a two-point contact feature that aids in the determination of the cylinder’s shape as well as any irregularities in the taper’s shape.

Carbide is used in the contact points to protect it from wear and to make it more resistant to abrasion. A locking feature also helps to keep the gauge stable while you’re attempting to insert it into the part you’re measuring.


  • Easy to read display
  • Displays measurements in both Metric and English units
  • Has a locking feature
  • Slightly higher in price


  • Slightly higher in price

2. Accusize Industrial Tools Bore Gage

A wide range of industrial applications is made possible by the accuracy of this device. Because of its wide measurement range, it can be used to measure bores and cylinders of varying sizes.

If you need to measure a deeper cylinder, this simple-to-use meter comes with an extension holder. A specially designed case is also included to keep the meter organized and safe while in storage. Furthermore, it is lightweight and portable, making it ideal for traveling.

With extremely small graduations on the dial, you can be confident that your measurements will be accurate. The carbide tip is extremely durable and resistant to wear and abrasion.. In order to improve durability, the contact point is made of stainless steel ball.

This tool is simple to use and has a firm grip, ensuring that you do not slip and fall. This tool is a must-have when you consider all of its features.


  • Can get accurate measurements
  • Has a non-slip handle
  • Very durable
  • Resistant to abrasion


  • Accessories are difficult to find

3. Mitutoyo 511-932 Dial Bore Gauge

This Mitutoyo bore gauge is equipped with all of the features you could want in a bore gauge. In order to ensure that the replacement parts you purchase fit perfectly, you can use it to measure things very precisely. Thus, it will be easier to ensure that the replacement parts are not thrown away.

The measurements you take with this tool will be extremely accurate, to within 0.0008 inches of the true measurement. This tool is significantly more accurate than other tools currently available on the market.

When it comes to measuring taper in cylinders and bore depth, the bore depth meter’s measurement range is from 0.75 inches to 6 inches. A contact system with two points is also included to detect any shape irregularities on cylinders that are not perfectly round, which is a useful feature.

To make the gauge harder and more resistant to wear, carbide has been applied to the contact points on the gauge’s body. As a bonus, this helps to protect it from being scratched. Furthermore, it is protected by a strong cover, which increases its overall durability.


  • High abrasion resistance
  • Provides optimum accuracy
  • Durable contact points
  • Comes with a sturdy cover


  • Some users don’t like the product’s packaging.

4. Anytime Tools Dial Bore Gauge

The accuracy of this bore gauge is well-known in the industry. The instrument also includes easy-to-read gauges and other features that make it more user-friendly. This tool ensures that cylinder measurements are accurate each and every time.

The bore gauge is 10 inches deep, which is a long distance. It is capable of measuring bore diameters up to 6 inches in diameter.

The graduations on the dial are spaced 0.0005 inches apart to aid in the accuracy of the measurement. The carbide tip of the plunger is extremely durable and resistant to wear and damage.

It is equipped with jewel bearings on the inside. As a result, it is precise, light, and compact. As a result, you will find it enjoyable to use the gauge. In addition, the gauge has minimal frictional forces, which can have an impact on the precision of your measurements.

When measuring cylinder taper and out-of-roundness, there is no need to remove the piston. This is an excellent method.


  • Can measure deeper bores
  • Comes with a jewel bearing
  • Highly accurate measurements
  • Uses a carbide tip for wear resistance


  • The instruction manual is not detailed.

5. Accusize Industrial Tools Toolmaker Inspection Set

It is a great addition to our list. It has everything you need to measure bores quickly and accurately. There’s also a micrometer, dial bore gauge, and telescoping gauge.

Six micrometers are available. They all have 0.0001-inch graduations and are very accurate. Each is hardened and has a carbide anvil for durability.

Micrometers are great for measuring small objects’ thickness and length. This tool can measure up to 6-inch bores. They’re also adjustable and have a padded grip.

Use the telescoping gauge set to measure the inside dimensions. It includes 6 tools with varying measuring ranges. They’re also sturdy and have a rigid handle.

This product set is a good choice because it is the most versatile.


  • Highly accurate measurements
  • Has 4 sets in one product
  • Made with high-quality materials
  • Comes with several measuring ranges


  • Slightly more expensive
  • Not all sets are ideal for non-mechanics

6. Wondersunm Precision Inch

The Wondersunm Precision Inch Dial Gauge is helpful because it has a lot of different clusters that make it easier to find the right place on a shotgun. We also liked that it was easy to assemble and only took one minute to put together. We found the extension holder helpful, too, because it made it easier to go inside the shotgun.

The Wondersunm Precision Inch Dial Gauge is accurate, working from 0.7 to 1.5 inches. It is also very comfortable to use, with a wide radius range that makes it easy to find the exact bore you need to measure. The bezel lock on the gauge allows us to fix the reading while taking multiple measurements simultaneously.

The Wondersunm Precision Inch Dial Gauge comes with a safe ABS case that you can use to store it. It also includes 7 anvil spacers, so it will be easy to take readings.


  • Easily adjustable with a bezel lock
  • Self-centering measuring heads
  • Chrome-plated handle


  • Only 6-inches depth

7. All Industrial PRECISE

If you need accurate measurements, you need a good deal that has small graduation. The All Industrial PRECISE Digital Gauge is a bore gauge with 0.0001 inches of graduation. We found that it can even record macros of bores which allowed us to get minute details of every bore. Clearly, we can say that it has the best dial for measurement in this segment. Considering the price, it is a great purchase for beginners.

The All Industrial PRECISE Digital Gauge has a range of 2-6 inches. Because it has multiple heads, the product became easier to use. It could even go from 6-8 inches. The taper and roundness of the heads made it easier to reach the deepest interiors.

The All Industrial PRECISE Digital Gauge is easy to set up. It only took us 2 minutes to assemble it and start using it. Plus, you’re covered by a 1-year warranty.


  • Includes fitted plastic case
  • Self-centering measuring heads
  • Chrome-plated handle


  • Not for depth recording

Things To Consider Before Buying a Bore Gauge

People usually think that all dial bore gauges have the same features. But this is not always the case. Essentially, they all use the same principles, but they do not have the same performance.

You need to know about dial bore gauges before you choose one. There are many different dial bore gauges, so you need to learn about them before deciding which one to buy.

Range of Measurement

The measurement range is the most important part of a bore gauge tool. This is because it helps to measure objects accurately. For the dial bore gauge tool to work well, there must be an accurate ring gauge. The accuracy of the ring gauge will affect the range of the tool.

If you work in a larger area, you should use a bore gauge with a 0.7 to 0.6 inches diameter.


The second important thing you need to consider when using a dial bore gauge is how efficiently it works. This will tell you how deep it can reach when working on a bore. If you are working on a long cylinder, you will need a longer-range bore gauge. Otherwise, any range of products should work fine.

Tools Accuracy

When looking for a tool, it is important to know its accuracy. This is especially true if you plan to use the tool to measure the size of something or to fill a hole. That is why it is important to select a product with enough accuracy.

Product Durability

Make sure the product you buy is durable. This doesn’t mean that the product will be less durable. You need to check how durable the product is. Make sure it has abrasion features. This means it can handle damage from being used often.

Storage Case

Make sure you have a case to keep your gauge in. This is important because it will keep your dial bore gauge and accessories together. You won’t lose anything this way, and your kit will be safe. Some cases come with padding for extra safety, but others do not.

The material that the case is made of determines how durable it is. ABS (acrylonitrile butadiene styrene) is the most durable material, making the storage cage stronger and more protected. If the gauge isn’t needed, the case will stay together and be more protected.

Gauge Weight

Many products on the market come in a lightweight design. This makes them easy to use and to carry with you. However, the weight of a product can vary depending on whether or not you need accessories with it. For example, suppose you need a gauge with no accessories. In that case, it will be much lighter and easier to carry around than one that has multiple attachments.

How to Take Accurate Measures With a Bore Gauge?

Dial bore gauges are used by machinists to measure the inner diameter of bores. This tool can save you time because it gives accurate measures. Now that you know how to use it, you can take quick and precise measurements.

  • Make sure that the gauge and micrometer are in the same diameter.
  • Now rotate its dial unit with the 0 points.
  • Make sure that all the screws touch the wall using a bore gauge.
  • If the tool is squared, then the same pointer should be started for reserve and head in the opposite direction.
  • Record the two-point measurement. This is where the bore gauge pointer reverses and removes from the hole.
  • Now, remove the bore gauge and add the recorded value from the target numbers.
  • If your bore gauge was from 0 to 2 inches, and the pointer changed direction was .007 inches, then the final measurement of the hole is 2.007 inches.

Final Thoughts

There are many factors to consider when choosing a Bore Gauge. You may want to consider the range of the tool, how difficult it is to access the area you need to measure, and how quickly and accurately you need the measurement.

We hope this guide has given you the knowledge to decide the type of bore gauge you need.

Frequently Asked Questions About Best Bore Gauge

How Accurate Are Bored Gauges?

The accuracy of a micrometer in measuring the size of a hole will be 0.002 inches or 0.0508 millimeters. When a dial bore gauge is set with the help of a ring gauge, the overall accuracy will be within 0.0001 inches or 0.00254 millimeters.

What Is the Best Tool to Measure the Inside of a Cylinder Bore?

A bore gauge is a tool inserted into a hole to measure the diameter of the hole. The gauge has small parts that expand outward to measure the size of the hole.

How Many Types of Bore Gauges Are There?

There are two types of shotgun gauges: the half-ball and the full-ball. The small-hole gauge is inserted into the barrel and slowly adjusted until light pressure is felt. It is then removed and measured against a micrometer or caliper.

Why Is It That You Need to Hone the Cylinder?

When you change the piston rings, you will need to hone the cylinder most of the time. This is because honing creates small crosshatches on the surface of the cylinder, which will help keep the wall of the component coated with oil and provide lubrication for the piston ring.

How Do You Know if a Cylinder Needs Boring?

If your piston is damaged in any way, you may need to re-bore your cylinder. If you can feel vertical scratches on the wall of your cylinder, you will need to bore your cylinder. If your piston seizes, you will also need to bore your cylinder. If it appears that the piston has any damage or vertical lines, this is a sign that you should bore your cylinder.

Can You Measure Cylinder Bore With a Caliper?

Choose a micrometer with a range large enough to accommodate the piston diameter. The dial caliper can measure the point on the piston where you want to take your measurement. A zero to six-inch caliper should be sufficient for this purpose. Finally, use the bore gauge to measure the cylinder bore diameter.

What Is a Mercer Gauge?

A precision gauge is used to measure how round cylinders are and how much they have been worn down.

What Is a Dial Bore Gauge?

A dial bore a gauge is a tool that measures the inside diameter of small holes. A dial bore gauge is a perfect tool for measuring the diameter of parts with small holes. This type of gauge is calibrated in 0.001 inches, and it consists of a shaft with a dial indicator on top.

What Is a Snap Gauge Used for?

Snap gauges are metrology tools used to measure the diameter or thickness of a part or material. They are versatile and can quickly decide if something is the right size or not. Snap gauges are most often used for cylinders, shafts, grooves, and other similar parts in machining operations.