You have the PDF. Now, how do you use it?
Step 1: Define the Gear Data You need: Module (m), Number of teeth (z), Reference diameter (d), Face width (b).
Step 2: Select the Grade Open your JIS B 1702-1 PDF to Section 5 (Classification). Decide the grade (usually 5, 6, 7, or 8). jis b 1702-1 pdf
Step 3: Calculate the Tolerance Values
The PDF provides formulas. For example, the tolerance for single pitch deviation (fpt) might be calculated as fpt = 0.6 + 0.02m. Cross-reference this against the tables.
Step 4: Inspection Using a gear measuring machine (GMM), measure the actual gear. If the deviation is less than the PDF's table value, the gear passes. You have the PDF
If you need the actual standard for certification or legal compliance:
Here is the hard truth for those looking for a zero-cost download: Most free PDFs of JIS B 1702-1 are either illegal copies, outdated drafts, or watermarked previews. Step 2: Select the Grade Open your JIS
The Japanese Standards Association strictly enforces copyright. Unlike open-source software manuals, industrial standards are revenue streams for national bodies.
Before you search for the PDF, you must understand what the document actually governs.
JIS B 1702-1:2015 (or later revisions) is the Japanese Industrial Standard for the Accuracy of Cylindrical Gears for Involute Teeth. Specifically, Part 1 defines the tolerance classification for gear teeth.
Released under the authority of the Japanese Standards Association (JSA), this standard specifies: