QB/T 2399-1998 Watch crown and crown tube matching dimensions series QB/T2399-1998 Standard download decompression password: www.bzxz.net

QB/T 2399-1998
This standard is equivalent to the international standard ISO/DIS10522.2:1998 "Structure and dimensions of crowns and crown tubes of chronograph instruments". This standard is a revision of the original GB4042--1983 "Watch crown tube matching dimension series" and the original GB4044--1983 "Watch crown dimension series" and is adjusted from a national standard to an industry standard. The main differences between this standard and the original GB4042-1983 and the original GB4044-1983 are: the writing format and expression method are implemented in accordance with GB/T1.1-1993; - Chapter 2 referenced standards are added;
- The dimension series is equivalent to the international standard ISO/DIS10522.2. This standard was proposed by the Industry Management Department of the State Bureau of Light Industry. This standard is under the jurisdiction of the National Clock and Watch Standardization Center. The drafting unit of this standard: Dandong Watch Industry Company. The main drafters of this standard: Su Fusheng and Ren Liang. From the date of implementation of this standard, GB4042-1983 "Watch handle tube matching dimension series" and GB4044-1983 "Watch handle tube size series" shall be abolished.
1 Scope
Light Industry Standard of the People's Republic of China
Watch handle and handle tube matching dimension series This standard specifies the structure, dimensions and tolerances of watch handles and handle tubes. This standard is applicable to watch handles and handle tubes with waterproof marks. 2 Referenced standards
QB/T 2399-1998
eqyISo/DIs10522.2:1998
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T1803-1979 Tolerance and fit dimensions to 18mm hole, shaft tolerance zone 3 structural type
3.1 Handle (see Figure 1)
D—handle outer diameter (1~2 type); Dz—thread diameter (1~2 type), Ds—handle diameter (1~2 type), D—knurl surface height (12 type); F,——handle protruding length (1 type); F—handle recessed length (2 type); H1 - Height of the crown (Type 1-2); P, - Depth of the groove of the crown tube (Type 1-2); P2 - Depth of the threaded hole (Type 1-2) Figure 1 Crown
3.2 Crown tube (see Figure 2)
Approved by the State Bureau of Light Industry on November 25, 1998
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Implemented on June 1, 1999
QB/T2399-1998
d, - Matching diameter (Type 1-3) sd2 - Diameter of the winding handle hole (Type 3) rds - Installation diameter (Type 2-3), d - Hole diameter (Type 1-3); 1 - Total length (Type 13) - Exposed length (Type 1-3); 2 - Depth of the crown hole (Type 3) Figure 2 Crown tube
Note: In order to prevent the surface of the case hole from being damaged, dt=1.5 mm and 1.6 The outer edge of the handle tube of mm should be chamfered. 4 Dimension series and tolerances
4.1 Handle
4.1.1 The dimension series and tolerance zone codes of the handle are shown in Tables 1 and 2. The upper and lower deviations shall be in accordance with GB/T1803. Table 1
Type 1 and Type 2
(minimum)
QB/T 2399-
Table 1 (complete)
Type 1 and Type 2
(minimum)
Dimensions and tolerances apply to four-out and recessed handles 2 For thin movements, if D: M0.80 is used, the diameters of the handle and the handle tube should be reduced accordingly. 3 The recessed length F2 of the handle hub using type 3 handle tube + type 2 handle should be 0.2mm. Table 2Www.bzxZ.net
The knurled surface height C and the handle height H (see Figure 1) can be changed according to actual conditions. 4. 1.2
The minimum value of the handle tube groove depth P, should be greater than the exposed length of the handle tube. 4.1.3
The inner diameter of the handle seal should be 0.20mm~0.25mm smaller than the handle tube matching diameter (d). 4. 1.4
4.1.5The inner diameter of the handle cover should be 0.13mm larger than the handle tube matching diameter (d,). Type 1
4.1.6 When inspecting the finished watch, the radial load of the handle is 5N, and the minimum sealing should be guaranteed to be 2×105Pa. It is allowed to use 2 handle seals.
4.1.7 The mark of the handle is written as: D×D,×P.×P Type QB/T2399--1998 For example: 4.00X1.17×2.00X1.40 Type 1 QB/T2399-19984.2 Handle tube
4.2.1 The size series and tolerance zone codes of the handle tube are shown in Table 3, Table 4 and Table 5. The upper and lower deviations shall be implemented in accordance with GB/T1803. 117
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QB/T2399--1998
Type 1 and Type 2
Handle stroke
Handle stroke
2 When the wall of the handle tube is less than 0.125mm, the handle tube shall be low-temperature welded. 4.2.2
4.2.3 The minimum assembly length of a stamped handle should not be less than its assembly diameter. 118
QB/T2399—1998
4.2.4 The total length should be specified for any type of watch case. The recommended variation range is 0.1mm. 4.2.5 The marking of the handle should be written as: d,×1, type QB/T 2399-1998
For example: 2.00×1.902 type
QB/T 2399--1998
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