The ATS Standards Lab can provide gage block calibration services for English/Inch gage blocks or metric gage blocks.
Our Calibration Capabilities
Our Federal 130B-38W1 gage block comparator can measure blocks from 0.004 to 4 inches (0.10 mm โ 100 mm), and our Federal 130B-58W1 long gage block comparator can measure blocks from 5 to 20 inches (125 mm โ 500 mm).
Thorough Data Reports
These comparators also utilize the Mahr Federal Gage Block Measurement Software, which allows for greater accuracy in measurement and computer-generated data reports. Our data reports include initial deviation measurement along with additional measurements for flatness and parallelism, expressed on the data sheet as variation in length (ViL), in accordance with applicable tolerances for the grade of blocks being certified.
Calibration Specifications
All gage blocks are certified to their original manufacturer grade tolerance in accordance with one of the following specifications: Federal Specification GGG-G-15C; ANSI/ASME B89.1.9M-1984 or ANSI/ASME B89.1.9M-2002. The original manufacturer grade tolerance will determine the specification and accuracy limitations that are utilized.
- Certificated English/Inch Gage Blocks
- Certificated Metric Gage Blocks
- Long Gage Block Comparator
- Computer-Generated Data Report
- Deviation Measurement
- Flatness and Parallelism
- V-Block Calibration
About Our Lab
The Standards Lab is environmentally controlled for high precision measurement capabilities. Prior to testing, we clean all gage blocks and allow a minimum of 24 hours of stabilization in the Standards Lab. The temperature-controlled lab is maintained within two degrees of 68 หF with a relative humidity of 30-55% R.H. The lab also has isolation joints in the flooring to reduce vibration effects.
Contact Us
Request gage block calibration today! Call +1 (888) 287-5227 or submit a form online.

