Best Cylinder Bore Gauge

Power is utilized by human beings in every walk of life. There are many ways in which power can be generated. One such method is by the process of combustion where a piston arrangement is used to compress the gas, thereby producing energy. In this process, there is friction between the cylinder and piston when they are in motion. This friction leads to power degradation and decreased compression pressures in the long run. Hence, we need to ensure that the cylinder and the piston are fit to use by properly monitoring them at regular intervals. 

The wearing of the cylinder can be classified into two types. The first type is the cylinder wear on the sides, which is called tautness and the second is the wear out of the cylinder when it is viewed from the top.

A cylinder bore gauge is designed for this purpose. It measures the diameter of the cylinder up to a precision of nearly 0.01 mm. The different parts of the bore gauge are as follows:

  1. Dial gauge: It is the scale which measures the size of the cylinder diameter in millimetres
  2. Lock: It is used to hold the dial gauge firmly in position when the bore gauge is in use
  3. Grip: It is used for handling the bore gauge to ensure accuracy
  4. Replacement rod: This rod is used as a reference for measuring the cylinder diameter and can be replaced with rods of various lengths for varying diameters of the cylinder
  5. Replacement washer: It is similar to the replacement rod in its purpose but has a comparatively smaller thickness with a range of 0.5 mm
  6. Measuring point: It moves the needle of the dial gauge when pressed.

Some of the best cylinder bore gauges available in the market are listed below:

Top 9 Cylinder Bore Gauge

1. HFS Dial Indicator Bore Gage

This bore gauge is designed for measuring deep cylinders with excellent accuracy and precision of up to 0.0005 inches. It works for the cylinder diameter ranging between 2 to 6 inches and, the dial gauge is made with holed jewel bearings. The tip of the plunger is made using titanium or tungsten carbide material with the opaque thermoplastic polymer storage case included to keep the components secure and avoid getting misplaced. This specially designed bore gauge can measure cylinder depths as deep as 10 inches precisely without having the need to remove pistons for measuring different areas of the same cylinder. Hence, it can easily detect grave wear out areas of the cylinder. It is made of good quality stainless steel and weighs approximately 2.27 Pounds. 

It also has sub-anvils of 10 inches to measure the inner diameter for the various working conditions of the bore gauge. A gauge block and precision callipers are needed to set up the bore gauge before using it for measuring the cylinder diameter. It is inexpensive but accurate. Hence, it is perfectly suitable for small-time technicians.

2. Fowler Full Warranty 6″ Cylinder Dial Bore Gage with Carbide anvils

Fowler is an American giant which manufactures measuring devices like indicators and bore gauges which are accurate and reliable, the main reason for which their products are trusted and used widely around the world. It can measure bore diameters ranging from 2 to 6 inches with a precision of up to 0.0005 mm. It is made of chromium plating and has a carbide tip to withstand the pressures of daily wear and tear and ensure reliability. It has a spring-loaded centralized foot to improve the accuracy with which it measures the cylinder diameter. This bore gauge incorporates a two-point contact system to detect the cylinder defects such as ovality and other errors. It is easily adjustable, and its insulated piston grip ensures swift single-handed operation for various areas of the cylinder efficiently and also from one cylinder to another.

It also has a 2-inch extension holder and weighs around 2.35 Pounds. It also comes with four anvil spacers and a perfectly fitted case to keep the components in place. The company offers a 1-year warranty on the material and performance of the bore gauge. A micrometer and precision callipers or gauge block are needed to properly set up the cylinder bore gauge before using it to serve its purpose. It can measure efficiently for ages to come if proper care and consistent maintenance are done.

 3. Anytime Tools Dial Bore Gauge

This bore gauge gives an unbeatable precision measurement for the cylinder diameters ranging from 0.7 to 6 inches and depth 10 inches. It has contact points that can be adjusted or changed to suit the user’s requirement and has an accuracy of 0.005 inches. The measuring plunger is made of titanium or tungsten carbide tip for accurate measurements. The bore gauge also comes with an opaque thermoplastic polymer case to keep the components safe and avoid misplacement. 

The dial gauge has holed jewel bearings to withstand pressures due to prolonged usage whilst providing accurate readings and weighs approximately around 3.27 Pounds. This gauge can detect critical wear out of the cylinder without having the need to change pistons for measuring the upper, middle and lower areas of the cylinder. It also has an analog system to indicate the tolerance values, and it need not be calibrated manually before measurement and can be used directly for measuring in the metric system. It is comparatively inexpensive and is also easy to use.

4. Anytime Tools 2″

This bore gauge can measure cylinder bores to a depth of 10 inches on the metric system and can be used for cylinder diameters ranging from 2 to 6 inches with an accuracy of 0.0005 inches and weighs around 2.5 Pounds. It corporates a liquid crystal display in its design to indicate the measures in an analog screen with different indicators for various wear outs and tolerances. Hence, the measurements done on this device are easier to read and can be recorded with the help of a special digital output that can be transmitted to other devices for recording the data of measurements. Extra batteries and a good quality storage case made of an opaque thermoplastic polymer are also provided so that the components are safe, and thereby the lifetime of the device is increased. 

The device is also specifically designed to measure different areas of the cylinder without having to replace the components for individual measurements and can significantly detect wear outs and errors in the cylinder bore. It is easy to set up for use using a vernier calliper or a simple rule and can accurately measure the cylinder of motorcycles compared to other telescopic or micrometer bore gauges.

5. YaeTek Bore Gauge – Deep Engine Hole Cylinder Measurement Gauge

This bore gauge can measure bore diameters ranging from 2 to 6 inches with an accuracy of 0.001 inches. It weighs approximately 2.44 Pounds. It is simple to use and is also undemanding. It is designed especially for professionals and can record a wide range of measurements with the help of the connectors provided. It is made of good quality material and comes at a reasonable price. The anvil and the dial gauge must be properly cleaned before each measurement to ensure the readings are accurate and precise. It is packed in a plastic storage case to keep the components secure and avoid misplacement.

6.  6 Pc Precision Telescoping Gauge Set

This bore gauge can measure diameters ranging from 5/16 to 16 inches using its exclusive six-piece set of instruments. It is manufactured using supreme quality stainless steel finished with a satin chromium plating and is spring-loaded to improve the accuracy of its measurement. The bore gauge is enlarged with twisted knobs and long rods when put in a hole and stabilizes itself to effectively detect wear outs at increased lengths of the bore using simple measuring devices. The endpoints of the gauge are hardened to ensure proper fitting so that the measurement is not hampered. It approximately weighs around 11.99 Ounces. 

The bore gauge comes with a 1-year warranty on material and craftsmanship and a synthetic pouch to keep the components in place and ensure easy handling. It is smooth in operation and is also cheap and can work efficiently in the long run if proper technique and maintenance are guaranteed.

7. PRECISE 2″-6″ Bore Gauge

This dial bore gauge can measure bore diameters ranging from 2 to 6 inches with an accuracy of nearly 0.01 mm and approximately weighs 1.80 Pounds. It is made of steel that is perfectly suitable to make these kinds of tools to withstand pressures of extended use and resist wear and tear. It also includes a plastic storage case to keep the components secure, the anvils refer to its own measurement, and the contact points that can be adjusted to suit the user’s requirement makes the bore gauge more accurate. 

The dial gauge is made of bearings to benefit the user without having to change the replacement rods and washers for different measurements. It is best suitable for detecting faults in the shape of the cylinder, tampering at the edges etc. A micrometer and vernier calliper is needed to set up the gauge before using it. It is smooth in operation, easy to set up and use; hence, it is highly recommended by technicians around the globe. It is also inexpensive and has excellent accuracy in its measurements.

8. Fowler Full Warranty X-Tender-E Electronic Dial Bore Gauge

This bore gauge can measure cylinder diameters ranging from 1.4 to  6 inches with an accuracy of nearly 0.001 mm to a depth of 10 inches and weighs approximately around 2.9 Pounds. It has an extension holder that fits the device exactly between the two sides whose diameter is to be determined so that the measurement is accurate. It uses a digital indicator to display the measurement in both inches and metres. The bore gauge is plated with supreme quality chromium, and its anvils are self-centralizing, which enhances the accuracy of its measurement. 

It incorporates a two-point contact system to effectively detect faults and tampering on all the sides of the cylinder, including shape deformities. The tip of the plunger is made of titanium or tungsten carbide to resist the pressure of prolonged usage without hindering its purpose. It also includes anvil spacers and a perfectly fitted storage case to keep the components in place. The bore gauge is easy to install and adjust the different replacement rods and washers to suit the user’s requirement.

The manufacturer Fowler offers a one-year warranty on the material and craftsmanship of the bore gauge. It is inexpensive, reliable, durable, easy to set up and use using a simple micrometer and vernier calliper and smooth in functioning for which it is highly preferred by machinists.

9. iGaging Dial Bore Gauge – Deep Engine Cylinder Measurement

This bore gauge can measure cylinder diameters ranging from 2 to 6 inches with a resolution of 0.0005 inches and weighs approximately around 0.01 Ounces. It can measure up to a depth of 10 inches without the user having the need to change the replacement rods or washers frequently. It can detect grave wear outs of the cylinder effectively at all areas of the cylinder, the contact points of the gauge can be adjusted, and the dial gauge is made of holed jewel bearings to improve the efficiency of its measurement. 

It is made of quality material so that it can withstand the pressures of daily wear and tear without affecting its performance. It is inexpensive, reliable, durable and smooth in its functioning for which is highly known and recommended by technicians and machinists throughout the world. It also comes with the opaque thermoplastic polymer storage case to keep its components in place. Good maintenance and craftsmanship improve the life of the device. Simple measuring callipers and a micrometer are needed to set up the device before using it for its purpose.