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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.
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
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.
Manufactured under carefully controlled conditions; Calibrated at 68°F
Polished to a mirror-like surface finish for maximum accuracy; Designed to resist corrosion and wear, ensuring longevity and durability even with frequent usage
The setup blocks can easily set the height of the fence, blades bits and other cutters according to the needs, which is faster and more accurate than using a combined ruler.
Combine bars to setup 100's of measurements. Stack setup bars for a wide variation or sizes, or use on their own, work and measure quickly.
Set up gauge blocks are all 3 inches long. Accurate saw gauge block set sizes: 1/16", 3/32", 1/8 ",5/32" ,3/16" ,7/32" ,1/4" ,5/16" ,3/8" ,7/16", 15/32", 1/2", 23/32", 3/4", 1x2x3"
Easy-to-read laser etched labels on each block. Fitted case included, so the combination square will be more tightly protected during transportation.
15 pcs Blocks Solid Aluminum Construction Black Anodized to better protect router bits and saws.
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.
SPEED UP YOUR WOODWORKING SETUP - Set the height of your fence, blades, and bits in a fraction of the time. The Blockcision gauge block set comes with 16 precision setup blocks, including the SpeedStep Multi Height Block, that can help you set up your cut...
UNIQUE WOODWORKING RULER MARKINGS FOR QUICK MEASUREMENTS - You've just stumbled upon the only 16-piece set up blocks set with ruler markings on each setup bar. While other sets only mark the 123 blocks, we've graduated every single one to help you make...
WORK WITH INCREDIBLE PRECISION - Whether you're setting up your table saw blade or router, next-level accuracy will be on your side. Blockcision aluminum miter bars are precise to ± 0.001” and allow you to make any measurement from 1/16” to 1” in...
SOLID METAL FOR SOLID DURABILITY - Get router setup blocks & woodworking tools crafted to withstand the busiest workshops. Our aluminum alloy table saw accessories are dent-resistant and don't dull cutting edges. You'll also love the laser-engraved...
NEAT AND TIDY - Keeping the workshop clean can be a challenge. That's why we've included a sturdy polypropylene case so your wood working tools are nicely stowed away, but always ready to get to work.
Last update on 2026-07-18 / 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.
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