JB/T 5525.1-1998 JB/T 8825.1-1998 Whitworth thread tap JB/T8825.1-1998 Standard download decompression password: www.bzxz.net

IC'S 25.100,50
Mechanical Industry Standard of the People's Republic of China
JB/T8825.1-1998
Whitworth Thread Taps
Taps forwhitworththreads
Published on 1998-12-29
National Bureau of Machinery Industry
Implemented on 1999-07-01
JB/T825.1—1998
This standard is formulated with reference to the relevant provisions of Part 4 of the International Standard 1S0529:1993 (Short Hand and Machine Screw Buttons). The type and size are the same as the international standard.
This standard was implemented on December 29, 1998 and was first issued. This standard was proposed and managed by the National Standardization Technical Committee. The main originating unit of the standard: Shanghai Cutting Tool Factory. Scope
Machinery Industry Standard of the People's Republic of China
Whitworth Thread Taps
Taps for #biteyorth threads
JB/TBB25.1—1998
This standard specifies the basic requirements for the type, size and marking of threaded wire (hereinafter referred to as threaded wire). This standard applies to threaded wire with T thread code 1-4 pressure thread. 2 Referenced standards
The texts 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 will be revised, and all parties using this standard should explore Discuss the possibility of using the latest versions of the following standards: JB/T8825.2—1999 Tolerance of Female Thread Effect of Zhishi Thread B/T8825.3—1998 Technical Conditions of Shishi Thread Effect 3 Types and Dimensions
3.1 Male Thread with Thick Shank and Neck The type is as shown in Figure 1, and the dimensions are given in Tables 1 and 2. A
Thread Effect Code
1/840BW
3/16-24BSW
17420BSW
5/[6-18 RSW
3.8-16 BSW
Every 25.4mm
Number of upper teeth
Nominal diameter
Property: No empty knife increase when the explosion continues to be divided into length dimensions of 1. Window home Machinery Industry Bureau 1998-12-19 approved 1.15
1999-07-01 actual
Screw number
3/16-32HSH
7/32-28RSF
1.4-26日5F
9/32-26BSF
511622BSF
3/B20 BSF
Nominal diameter
JB/T8825.1—1998
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Note: When there is no empty cutter groove, the length of the threaded part should be 1+4
3.2 The type of fine-shank tap is shown in Figure 2, and the dimensions are given in Tables 3 and 4. A
Frequency code
3/1624 BW
1420BSW
16-18BSw
3/8-16BSW
7/16-14 BSW
1/2-12BSW
9F16-12 BSW
No. 25.4mml
Number of upper teeth
Nominal diameter
：12.700
Thread code
5/8 LI eSw
X-11Bsw
7848SW
IX-7 BSW
1X-7 BSW
A-6 B5W
%-5 8SW
24-4BSW
2%4BSWbZxz.net
2X-3KBSW
3y-3y Bsw
4-3BSW
Snail number
3/16-32BSF
7/32-28BSF
1/4-26BSF||tt| |9/32-26BSF
5/16~22 D5F
3/8-20BSF
7.16-18 BSF
1P216 BSF
9/16-16BSF
25.4mm
Number of upper parts
Number of upper parts per 25.4mmm
Number of upper parts
Nominal diameter
Nominal diameter
$B/T8825.1-1998
Table 3 (end)
Explosion code
5/8-14BSF
IX-14BSF
3/4-12BSF
7/8-1I BSF
[-10 BSF
1-9DSF
1%-9 BSF
1% -8 BSF
1%-8 BSF
1%-8SP
1-7BSF
2-7 BSF
2%-6B8F
3-5HSF
3%- BSF
1-4BSF
each 5.4mm
upper tooth
nominal point diameter
19:050
57,130
J/T8825.-1998
Table 4 (complete)
Applicable range of single and finished cones, main angle: recommended cone length before cutting is given in 5. Table 5
Single and maximum combination
[equal diameter] some
forms (unequal diameter)
Applicable model
First twist rod
Second rough rod
Main deflection angle
Effective length
JB/T BR25.1—No. 1 98
3, 4 thread male nominal cutting front angle, measured in the radial plane, recommended as follows: a) the front angle is 8-10°
. b) the back angle α, 4-6%.
3.# Marking example
Right-hand coarse-pitch Whitworth thread, thread code 1/8-40BSW, 40 teeth per 25.4mm, 2-sensitivity tolerance zone, single toughness (Fu Tui) ground thread can:
Wai's thread ground thread, primary (bottom) 1/8-40BSW-2B/T6625.1—1998 right late fine-pitch Whitworth screw mosquito, climbing code 5/16-22BSF, 22 teeth per 25.4mm, two (primary and bottom) a set of equal diameter cutting taps;
Whitworth end cutting wire key, Tough (bottom) 516-228SFJET8825.1—1998 right-hand coarse-pitch Whitworth screw thread, thread code 3/4-10BSW, 10 teeth per 25.4mm, 3-grade tolerance zone, two sets of unequal light ground thread: Whitworth screw ground thread (unequal light) 3-3/4-10BSW-3/T8825.1—1998 left-hand light coarse-pitch Whitworth thread, thread code [-BBSW, 10 teeth per 25.4mm., single medium taper tap: Whitworth screw ground thread 1-8B5WJB 8825.1—19984 bee mosquito public some
thread fiber frequency tolerance according to old 8825.2.
5 technical water turbulence parts
technical conditions according to JB8825.3.
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