QB/T 2315-1997 Size series of round glass for watch cases

This standard specifies the size series of round glass for watch cases. This standard applies to the round glass series of watch cases. QB/T 2315-1997 Size series of round glass for watch cases QB/T2315-1997 Standard download decompression password: www.bzxz.net

QB/T2315-1997
This standard is a revision of the original national standard GB4047-1983 "Watch Case Round Glass Size Series". During the revision process, except for the format being implemented in accordance with GB/T1.1-1993 (Guidelines for Standardization Work Unit 1: Drafting and Expression Rules of Standards Part 1: Basic Provisions for Standard Writing
), its technical content has been greatly modified. According to the development and changes in watch glass styles and materials in recent years, those dimensional matching tolerances that are no longer of practical significance have been removed, and the outer diameter and thickness size series of round watch glasses have been retained. This standard was proposed by the Quality Standard Promotion Department of the China Light Industry Federation. This standard is under the jurisdiction of the National Clock and Watch Standardization Center. The drafting unit of this standard: Shanghai Watch Case Factory No. 1. The main drafters of this standard: Zhou Zeming and Yu Qun. This standard will be effective from the date of implementation. Starting from 1983, it also replaces GB4047--1983. 112
1 Scope
Light Industry Standard of the People's Republic of China
Dimension series of round glass for watch cases
This standard specifies the dimension series of round glass for watch cases. This standard is applicable to the round glass series for watch cases. 2 Dimension series
The dimension series of round glass for watch cases is shown in Table 1. Table 1
Diameter d
1d and e can be combined arbitrarily.
2The values ​​in brackets should be avoided.
Approved by China Light Industry Association on September 1, 1997
TTi KAoNni KAca-
Diameter d
5—1997
QB/T2315bzxZ.net
Thickness e
Implementation on May 1, 1998
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