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JJG 91-1989 English PDF

US$199.00 ยท In stock
Delivery: <= 2 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJG 91-1989: Verification Regulation of Base Circle Involute and Helix Gear Tester
Status: Obsolete

JJG 91: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
JJG 91-1989English199 Add to Cart 2 days [Need to translate] Verification Regulation of Base Circle Involute and Helix Gear Tester Obsolete JJG 91-1989
JJG 91-1978EnglishRFQ ASK 3 days [Need to translate] (Chinese Industry Standard) Obsolete JJG 91-1978

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Basic data

Standard ID JJG 91-1989 (JJG91-1989)
Description (Translated English) Verification Regulation of Base Circle Involute and Helix Gear Tester
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A52
Word Count Estimation 5,558
Date of Issue 6/22/1989
Date of Implementation 4/1/1990
Older Standard (superseded by this standard) JJG 91-1978

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Question 5: Should I purchase the latest version JJG 91-1989?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 91-1989 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.