Best Calibration Setting Rings of 2026

The Mitutoyo 177-139 Setting Ring is a calibration accessory for inside micrometers, dial bore gauges, and hottest. It allows for a quick zero adjustment of these tools and comes with the actual inside diameter marked on each ring. This product is made in Japan.

This precision measuring tool is a calibration setting ring with an accuracy of +/-0.00004". Made in Japan, it has a 1.0" size and 2.09" outside diameter, and weighs 0.45 lbs. Its compact item package measures 6.604 cm L X6.096 cm W X1.778 cm H.

The SPI Setting Ring offers a high level of precision with an incredibly smooth surface finish, ensuring accurate measurements for your calibration needs. It’s designed to help you calibrate inside micrometers at both the upper and lower ends of their range, making your measurements more reliable. This ring is also perfect for use with dial bore gauges, vernier calipers, dial calipers, and electronic calipers, giving you versatile options for various tools. Additionally, the actual size is clearly engraved on the ring, so you can quickly identify and use the correct size without any guesswork.

This calibration setting ring boasts Class XX accuracy according to ASME B89.1.6 and is constructed with durable stainless steel.

The INSIZE 1.6" Setting Ring is designed to help you zero inside micrometers, three-point internal micrometers, and bore gauges with ease. This tool ensures accuracy by providing a precise reference size, so you can confidently set your measuring instruments before use. It accounts for any slight differences between the ordered size and the actual size marked on the ring, helping you maintain reliable measurements. Weighing just under one pound, it’s lightweight and easy to handle, making your calibration process smoother and more efficient.

The MeterTo M151 Setting Ring is designed to help you accurately calibrate inside micrometers and three-point internal micrometers. It provides a precise zero setting, ensuring your measurements are reliable. The marked diameter has a very small uncertainty of ±0.00006 inches, giving you confidence in its accuracy. Its cylindricity is extremely tight at 0.00004 inches, which means the ring maintains a consistent shape for precise calibration. Additionally, the difference between the actual size and the nominal value is minimal, at just ±0.0004 inches, making it a trustworthy tool for fine measurement adjustments.

The MeterTo M191 Setting Ring is designed to help you precisely calibrate your inside micrometers and three-point internal micrometers. This tool ensures you can set your instruments to zero accurately, which is essential for reliable measurements. It has an extremely tight tolerance, with a marked diameter uncertainty of only ±0.00006 inches, giving you confidence in its precision. The ring’s cylindricity is also very high, at just 0.00004 inches, meaning it maintains a perfect cylindrical shape for consistent results. Additionally, the small error between the actual size and the nominal value, ±0.0004 inches, ensures the measurements you take are trustworthy.

The Mitutoyo Setting Ring is a precision measuring tool designed to help you calibrate your instruments accurately. With a size of 2.4 inches and a width of 0.79 inches, it offers a compact and convenient shape that’s easy to handle. The ring has an outside diameter of 4.41 inches, making it suitable for various calibration needs. It boasts an impressive accuracy of plus or minus 0.00004 inches, ensuring your measurements are reliable. This product comes from Japan, known for its high-quality manufacturing, offering you confidence in its durability and performance.

The MeterTo Calibration Ring is designed to help you accurately set inside and three-point internal micrometers to zero, ensuring precise measurements. It offers a very tight tolerance with a marked diameter uncertainty of just ±0.00006 inches, giving you confidence in its accuracy. The ring's cylindricity is also extremely precise at 0.00006 inches, which means it maintains a perfectly round shape for consistent calibration. Additionally, the difference between its actual size and the stated size is minimal, within ±0.0008 inches, so you can trust it to provide reliable reference points for your measuring tools.

The MeterTo Calibration Ring is designed to help you accurately set the zero point on inside micrometers and three-point internal micrometers. This ensures precise measurements by providing a reliable reference. With a marked diameter uncertainty as low as ±0.00006 inches, you can trust the ring's size to be very close to the actual value. The ring also offers excellent cylindricity, meaning its roundness is maintained within 0.00004 inches, which helps maintain consistent contact with your measuring tools. Additionally, the ring's size error is kept within ±0.0004 inches, giving you confidence in its accuracy and reliability during calibration.