6 Pin Gauge Manufacturers in 2024

This section provides an overview for pin gauges as well as their applications and principles. Also, please take a look at the list of 6 pin gauge manufacturers and their company rankings. Here are the top-ranked pin gauge companies as of December, : 1.Orbray Co., Ltd., 2.Rich Treasure Precision Industrial Co., Ltd., 3.Cary SA.

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What Are Pin Gauges?

Pin gauges are precision measurement tools primarily used to assess the inside diameter of holes in products and determine whether the hole size conforms to a specified standard.

Typically, sets of pin gauges with varying thicknesses are available. When measuring hole diameters using a length measuring machine like a 3-point micrometer, where results are obtained numerically, variations can occur based on the skill of the person performing the measurement.

However, pin gauges provide stable and consistent measurements, reducing variability regardless of the operator's skill level.

Applications of Pin Gauges

Pin gauges find extensive use in the manufacturing and quality control processes of industrial products. They are especially valuable for measuring the inside diameter of small holes, which cannot be accurately measured with instruments like a 3-point micrometer. Pin gauges are employed to determine whether the hole diameter falls within the specified tolerances.

Furthermore, pin gauges can be utilized to measure the distance between two holes. By inserting pin gauges without play into each of the two holes, measuring the outer diameters of the pin gauges with a vernier caliper, and subtracting the radii of the pin gauges, the center-to-center distance between the two holes can be calculated.

Pin gauges also play a role in measuring gears. To evaluate the thickness of gear teeth, one parameter considered is the overpin dimension. This involves placing two Pin Gauges between gears, measuring the distance between the outer diameters of the pins, and using this measurement for assessing the thickness of gear teeth, both for external and internal gears.

Principles of Pin Gauges

Pin gauges belong to the category of measuring gauges.

These gauges are manufactured with strict control not only over their outside diameter but also regarding roundness and cylindricity. Due to their extremely high precision, pin gauges are inserted into the hole being evaluated. For instance, if a hole can admit a 3.05mm pin gauge but cannot accept a 3.10mm pin gauge, the bore diameter is determined to be within the range of 3.05mm to 3.10mm.

Additional Information on Pin Gauges

1. Handling of Pin Gauges

When handling pin gauges, temperature sensitivity should be taken into account. Most pin gauges have small diameters and low volume. Prolonged handling can lead to thermal expansion due to body heat.

Thermal expansion can cause the pin gauges to have a larger diameter than their indicated value. Despite their simple cylindrical design, pin gauges must be handled with care. Scratches on their surface can compromise their accuracy. Moreover, rust formation is a significant concern, especially for steel or superalloy pin gauges. Handling them with bare hands can introduce salt from sweat, leading to rust.

It is advisable to wear gloves when handling metal pin gauges. After handling them with bare hands, they should be wiped with a clean, soft cloth or leather and lightly coated with anti-corrosive oil.

2. Distinction from Plug Gauges

Plug gauges, like pin gauges, are inserted into the hole for evaluation. Plug gauges have two differently sized cylinders at each end, with one end serving as the "go" side and the other as the "no-go" side. This design allows for a quick determination of whether the inside diameter of the hole falls within the standard range.

Plug gauges are commonly used for holes with larger inside diameters compared to pin gauges since they facilitate relatively quick and straightforward inspections.

3. Materials Used in Pin Gauges

Pin gauges can be made from materials such as steel, cemented carbide, or ceramic.

Ceramic pin gauges are known for their ease of maintenance. They do not rust since they are not made of metal. However, they still require careful handling and should not be treated roughly simply because they do not corrode.

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What is a Pin Gauge?  

 

Pin gauges are precision cylindrical pins designed to inspect the inner diameters of a workpiece. They function similarly to Go and No-Go gauges, helping to determine if a hole falls within specified tolerances. Pin gauges are also used to check for geometric deviations and are particularly useful for verifying the straightness of deep holes.

 

Pin gauges can be made from various materials, including steel, carbide, ceramic, zirconia, and hard metal alloys.  

 

- Steel  

- Ceramic (Zirconia)  

- Tungsten Carbide  

 

Pin gauges are available both individually and as sets. Sets typically contain a range of sizes with small increments, such as 0.01 mm or 0.001 mm, depending on the precision required. These small increments are crucial, as pin gauges are often used for measuring smaller holes that demand high precision and accuracy. Each pin is marked with its exact size for easy identification.

 

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How to Use a Pin Gauge  

 

To use a pin gauge set, begin by inserting the smallest diameter pin gauge into the workpiece hole. Then, gradually insert larger pin gauges in order of size until you find the one that fits snugly in the bore. Do not force the pin gauge into the hole.  

 

The "Go" pin, which represents the lower limit of the bore, should fit smoothly without any force. The "No-Go" pin, representing the upper limit, should not fit, even with slight pressure applied. This method helps ensure that the hole is within the desired tolerance range.

 

Caring for Your Pin Gauge  

 

Regular maintenance and calibration are essential to ensure the accuracy of your bore inspections and extend the life of your pin gauge. Neglecting proper care can lead to unreliable measurements and early wear. Below are some key habits to help you maintain your pin gauge:  

 

Proper Usage  

 

Start by using your pin gauge correctly. Most pin gauges become inaccurate or damaged due to improper use. A common mistake is applying excessive force when inserting the pin gauge, which can alter its size or damage it. To avoid this, use a pin vise to handle the gauge. This reduces the impact of temperature changes from your hands and helps maintain the tool's precision.  

 

Proper Storage  

 

Proper storage is vital for extending the life of your pin gauge. Keep it protected from environmental factors like heat and moisture, which can affect its accuracy over time. We recommend using a dedicated container for your pin gauges. If you have a set, store each pin gauge in a separate small case to prevent contact and potential damage.  

 

Regular Maintenance  

 

Routine maintenance is crucial to ensure your pin gauge stays in good working order. Regularly inspect it for dirt, debris, and oil, as these can cause corrosion and affect performance. Keep the pin gauge clean and free from contaminants to ensure reliable measurements.  

 

Regular Calibration  

 

Calibration is essential to verify the accuracy of your pin gauge. While most manufacturers recommend calibrating once a year, the frequency should depend on how often the pin gauge is used. For tools with heavy usage, more frequent calibration is necessary to account for wear and tear. Regular calibration ensures the pin gauge remains accurate and reliable throughout its lifespan.  

 

Besides inspection of small holes, pin gauges can be used in many other ways:

 

- Distance between holes

- Calibrating micrometers

- Width of a groove

- Acceptance judgement

- Dovetail

- Inspection of engine parts

- Overpin diameter of gear

- Deflection of gear

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