This post contains affiliate links. As an Amazon Associate we earn from qualifying purchases.
Our picks are based on Amazon bestseller rankings, verified customer ratings, and product availability. We update our recommendations regularly to ensure accuracy.
Precision is paramount in many mechanical and manufacturing applications. Gage blocks serve as essential standards for calibrating measuring instruments and ensuring dimensional accuracy. Selecting the right set guarantees reliable measurements, reducing errors and costly rework. This guide helps you navigate the key considerations for choosing appropriate gage blocks.
[Include]:81 pc Grade B Steel Gage Block Set with MFG'S certificate
[Laser-Etched Identification]: Each gauge block is clearly marked with its serial number; includes traceable calibration certificate.
[Durable Material]: The gauge block set grade B is forged from tool steel that has undergone thorough quenching treatment, with a hardness of 65 RC. This ensures long-lasting performance and excellent wear resistance.
[Smooth Finish]:The gauge block set 81 piece create a perfectly flat surface, making them ideal for precise alignment and accurate stacking.
[Applications]: The gauge block set is applicable for a set of multi-functional equipment, size measurement, machine calibration, measurement tasks and tool inspection.
[Premium Material and Build]: Crafted from fully seasoned alloy tool steel, hardened to 65 RC for extended durability and resistance to wear, stains, and rust.
[Precision Accuracy]: Each block is manufactured under strictly controlled conditions to ensure the highest degree of accuracy, with measurement precision in millionths of an inch.
[ISO-17025 Certified]: Comes with long-form certification from an accredited ISO-17025 gage lab and each block is individually serialized for traceability.
[Versatile Application]: Ideal for calibration, inspection, and dimensional metrology in various fields, including tool and die making, machining, and engineering.
[Comprehensive Set]: Includes 81 pieces with sizes ranging from 0.1001" to 4", covering a broad range of needs for precision measurements in professional settings.
DURABLE CONSTRUCTION: This block set is made of the finest grade of high carbon / chrome steel that has a low coefficient of thermal expansion; fully stress relieved and hardened to 65 RC
ACCURANT MEASUREMENT: The gage block set is lapped and polished to a very low micro-surface finish; they feature a ± 0.00005" accuracy
INDUSTRIAL STANDARD: Standard industrial sizes ensure complete interchangeability with all accessories
SET INCLUDES: The set of gage blocks includes a deluxe fitted case and certificate of inspection traceable to the National Institute of Standards & Technology
BUILT TO LAST: Block have a wide range of tolerence and are able to withstand a wide range of shop needs
Our gage blocks are manufactured under carefully controlled conditions and inspected by the ASME B89.1.9-2002 standard, allowing for an accuracy of +/- 6 millionth for size under 1" block when used at room temperatures of 68 degrees Fahrenheit (or...
The gage blocks are made of fully seasoned alloy tool steel with hardened to 65 RC to provide resistance to wear, abrasion, and rust.
The measuring surface of the gage block are ground and micro-lapped to a mirror finished so the gage block can be wringable.
Grade AS-1, Manufactured under carefully controlled conditions allowing for the highest degree of accuracy when used at a temperature of 68 degrees F ( 20 degree C)
All gauge block sets are assigned serial numbers and are accompanied with a certificate of inspection listing the deviation for each block
All gauge block sets are made to special standards to resist corrosion and defacement
The coefficient of thermal expansion is 6.4 X 10
Each gage block set meets or exceeds federal specification ASME B89.1.9-2002
Grade AS-1 gage block supplied with a Mitutoyo certificate of inspection that the block meets American Society of Mechanical Engineers (ASME) B89.1.9-2002 standard for flatness, length, parallelism, and surface finish
High-carbon, high-chrome steel provides high hardness and wear-resistance
Rectangular base for accurate wringing
Nominal length (in inches) indicated with laser-etched, black characters
Identification number etched in block for traceability
Manufactured under carefully controlled conditions allowing for the highest degree of accuracy when used at a temperature of 68 degrees F ( 20 degree C)
All gauge block sets are assigned serial numbers and are accompanied with a certificate of inspection listing the deviation for each block
All gauge block sets are made to special standards to resist corrosion and defacement
The coefficient of thermal expansion is 6.4 X 10
Each gage block set meets or exceeds federal specification ASME B89.1.9-2002.
Last update on 2026-09-01 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Gage Blocks
Material and Durability
Gage blocks are typically made from hardened steel, ceramic, or carbide. Steel blocks are common and offer good durability, but can be susceptible to corrosion. Ceramic and carbide blocks are harder, more resistant to wear and corrosion, and have lower thermal expansion, making them ideal for high-precision environments or when extreme accuracy is needed.
Accuracy and Grade
Gage blocks are classified by their accuracy grade, with lower numbers indicating higher precision. Common grades include:
Grade AA (0.5): For reference standards and master calibration.
Grade A (1): For tool room applications and setting comparators.
Grade B (2): For general shop use and setting measuring tools.
Choose a grade that matches the precision requirements of your specific tasks. Higher grades offer greater accuracy but come at a higher cost.
Set Size and Configuration
Gage blocks are available in various set sizes, from small sets with essential sizes to large, comprehensive sets. Consider the range of measurements you need to perform. Larger sets offer more flexibility but are more expensive and require more storage space. Some sets are designed for specific applications, such as metric or fractional inch measurements.
Frequently Asked Questions
What is the primary use of gage blocks?
Gage blocks are primarily used as standards of length for calibrating measuring instruments like micrometers and calipers. They ensure that workshop measurements are accurate and consistent, which is crucial for manufacturing and quality control.
How should gage blocks be stored and maintained?
Proper maintenance involves keeping gage blocks clean, dry, and lightly oiled to prevent corrosion, especially for steel blocks. They should be stored in their original cases to protect them from damage and contamination. Avoid dropping or mishandling them to preserve their accuracy.
What is the difference between steel, ceramic, and carbide gage blocks?
Steel blocks are a common choice offering good durability. Ceramic blocks are extremely hard, resistant to wear and corrosion, and have very low thermal expansion. Carbide blocks offer similar hardness and wear resistance to ceramic, with good stability.
How often should gage blocks be recalibrated?
The frequency of recalibration depends on usage and the required accuracy. For critical applications, annual recalibration is standard. If blocks are frequently used, subjected to harsh conditions, or show signs of wear, more frequent checks may be necessary.
As an Amazon Associate, we earn from qualifying purchases. Product prices and availability are accurate as of the date/time indicated and are subject to change.
We use cookies to enhance your experience. By continuing to visit this site you agree to our use of cookies. Read our Privacy Policy
Before You Go!
Get the latest deals and product comparisons delivered to your inbox.
