JB/T 9193-1999 JB/T 9193-1999 Diameter of blank before rolling (or rolling) ordinary thread JB/T9193-1999 Standard download decompression password: www.bzxz.net

1C:S 21.040.01
Machinery Industry Standard of the People's Republic of China
JB/T9193-1999
The bar diameters for rolling eneral purpose screw threads
1999-06-24 Issued
National Bureau of Machinery Industry
2000-01-01 Implementation
JB/T9193-1999
This standard is a revision of JH203-83 "Bar diameters for rolling eneral purpose screw threads". During the revision, the standard was revised and adjusted according to the relevant schedule, and there was no change in the main technical content. This standard replaces JB2203 from the date of implementation
This standard is proposed and managed by the National Standardization Technical Committee. Drafting unit of this standard: Mechanical Science Research Institute Main drafter: Li Xiaobin,
■Scope
Mechanical industry standard of the People's Republic of China
Bar diameter for rolling grneral purposc serew threads
This standard specifies the bar diameter size and tolerance of rolling grneral purposc serew threads. JET 9193—1999
BZ 203—83
. This standard is applicable to the bar diameter of ordinary grneral purposc serew threads made of steel. It shall comply with the provisions of GD/T192, GB/T193 and GB/T197.
2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard by being referenced in the standards. At the time of publication, the values ​​shown are all valid. All standards are intended to be used. The possibility of using the latest version of the following standards should be explored in the application of the standards. CB/T192-1981 Basic tooth type of state thread GB/T193-1981- Common thread straightness and pitch series (diameter 1-600mm) GB/T197-1981 Common thread tolerance and fit (diameter 1-355mm) 3 The true diameter of the thread is calculated according to formula [ ] and formula (2]. The relative position of the thread diameter tolerance zone and the relative lightness tolerance zone is shown in Figure 1.demw-dimln+0.3 Ts,
dem.dini.+0.7 T.
Meanwhile:
du.—Minimum rough thread diameter:
—Maximum rough thread diameter:
d.Minimum external thread pitch diameter
T,—External thread pitch diameter tolerance
dru—External effective pitch diameter
Figure 1 Tolerance zone position of rough thread true diameter
Approved by the State Machinery Industry Bureau on June 24, 1999 (implemented on January 1, 2000)
Limit size of rough thread diameter
JBT9193-1999
For diameter range of 1~39 mm, tolerance grade 6, basic deviation h, f or suitable for evaluation of snail thread. Its interference (rolling; thread hair point tax limit size see Table 1,
for its local specifications or tolerances of ordinary screw hair bad diameter, can be authorized to the third competition to calculate the formula. Table difference (liquid thread hair diameter
nominal diameter
calibration tolerance zone
nominal point diameter
JB/T9193-1999
burning mosquito male and band
nominal diameter
JB/T 9193—1999
螈數公堂带
编西格
公积泊道
JB/T9193—1999
恨纹透差带
尔白经
14 653
14 917
22 949
28 914
20 949
18 257
18 B61
Nominal diameter
5Correction and adjustment of rough diameter
B/9193-1999
(Complete)
Thread tolerance zone
When the axial length of the thread is less than 2, the rough diameter of the thread is reduced by 0.1a-0.24. When the thread material is harder or softer, the rough diameter should be corrected according to the specific situation. dwww.bzxz.net
Required point diameter 4
34 936
33 185
34 854
56 245
37 8:4
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