of the part. Its length should ideally match the length of the hole or shaft being inspected. NOT GO Gauge : Designed based on the Least Material Limit (LML)
Plug gauges assembled by fitting a tapered part into the handle. Trilock Type: A robust assembly type for larger gauges. Why You Need the JIS B 7420 PDF
The standard also covers "reference disks" (挟みゲージ用基準円盤) used for gap gauges. These disks serve as masters or calibration standards for setting and verifying the accuracy of gap gauges, which are used to measure the clearance between two parallel surfaces. jis b 7420 pdf
It is essential to ensure that the PDF version of the standard is obtained from a reputable source to guarantee its authenticity and accuracy.
The is the Japanese Industrial Standard for Plain Limit Gauges , which are tools used to inspect the dimensional accuracy of holes and shafts without a scale. It provides the specifications for design, tolerance, and application of "Go" and "No-Go" gauges for workpieces up to 500 mm in diameter. Scope and Purpose of the part
To help point you toward the exact technical tables you need, could you share the or part tolerance you are working with? I can also provide details on how JIS B 7420 compares to ISO equivalents if you are exporting to Europe or the Americas. Share public link
Dimensional measurements in JIS B 7420 are standardized at a reference temperature of . Inspections and calibration should always occur in a temperature-controlled environment to prevent thermal expansion from skewing results. Compatibility with ISO Standards Trilock Type: A robust assembly type for larger gauges
JIS B 7420 is titled (限界ゲージ). It is published by the Japanese Standards Association (JSA). The standard establishes guidelines for manufacturing and inspecting plug gauges, ring gauges, and snap gauges.
Various technical document portals offer digital PDFs.
Modern Voyage Co. All rights reserved. © 2026