This standard specifies the type and size, technical requirements, marking and basic packaging requirements of 60° tapered pipe thread rolling wheels. This standard is applicable to taps for processing 60° tapered pipe threads (NPT) with thread size codes of 1/16~3/4. JB/T 8364.5-1996 60° tapered pipe thread rolling wheels JB/T8364.5-1996 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T 8364. 5-96
60° Taper Pipe Thread Rolling Wheel
1996-04-22 Issued
Ministry of Machinery Industry of the People's Republic of China
1996-07-01 Implementation
JB/T8364.5—96
Appendix A of this standard. Appendix B of this standard is the appendix of the quality standard. This standard is proposed and managed by the Small Tool Standardization Technical Committee of the whole region. The responsible drafting units of this standard are Shanghai Cutting Tool Factory, Shanghai Standard Parts Factory, or Shanghai Tool Research Institute. The main drafters of this standard are Ye Suidi, Rong Ti, and others. This standard was first issued on April 22, 1996, and this standard was implemented on July 1, 1996. 1 Specification
Machinery Industry Standard of the People's Republic of China
6 Tapered Pipe Thread Rolling Wheel
JB/8364.5-96
This standard specifies the type and size of the thread rolling wheel for pipe thread, the basic requirements for technical requirements, marking and packaging. This standard applies to the thread rolling wheel for pipe thread with a minimum of 1/16~3/4 and a 50-turn end thread (NPT>). 2 Types and sizes
2.1 The types and sizes of the thread rolling wheels shall be as specified in 1. Table 1. a
Type and size of thread rolling wheels
1 Size of thread rolling wheels
m
Thread rolling wheels
Approved by the Ministry of Machinery Industry on April 22, 1996
142-840
1996-07-01 Implementation
mm wwW.bzxz.Net
spider distance P
vegetable wire emperor
JB/T 8364. 5-96
Table 1)
to the most surface
to the winding process, the two-dimensional wire wheel is allowed to have a distance
2.2 The effective tooth shape and size of these filter wheels shall be less than 2, Table 2. Basic Note
The parallel warping of the heart
+ C-OSG: The original thread and standard of the rotational molding wheel are not allowed to leave this thread type [Appendix 2 The thread type of the rotational molding wheel is recorded in the standard. Table 2 The thread type of the rotational molding wheel is measured every 25.4 ram. 2.3 Marking example Frequency ratio P Batch development deviation. -4. 639
50° pipe thread, thread rolling wheel code NPT1/4: 5
Frequency (25.4mm)
Overlap thread effect
4° pipe thread rolling wheel NTPT1/4JB/T8361.59660° thread rolling wheel code PT1/4 in thread rolling condition: 60° thread rolling wheel NPr4·L
JB/T B336.5-S6
Tooth half angle
Deviation/2
3 Technical requirements
JB/T $364.596
3.1 The thread rolling wheel surface shall not have defects such as cracks, front edge, missing marks and grinding burns that affect its performance. 32 The upper limit of the surface roughness of the thread rolling wheel is determined as follows: Deep surface
3.2μm:
hole and two end faces R.
3.3 The size and form and position tolerances of each part of the thread rolling wheel are determined as follows: The difference between the diameter of a pair of liquid thread rolling wheels on the reducing surface and the width difference of a pair of liquid thread rolling wheels
The end face circular runout of the two hands to the axis is parallel to the large diameter and the middle diameter on the same cutting surface. 0.10mm
3.4 ​​The thread rolling wheel is made of 12MoV or 9Sr alloy tool steel, Cr12MV, and its carbide uneven deformation is not more than 3 edges.
3.5 The melting point of the thread rolling wheel is not less than 58IIRC4 Marking and packaging
4.1 Marking
4.1.1 The thread rolling wheel should be marked with:
) Manufacturing trademark:
1) Operation code;
Material,
4.1.2 The packaging box should be marked with:
) Manufacturer name, trademark, and address:
1 Example of marking on the whole wheel: Items to be specified:
) Material brand or number
) Number of pieces:
) Selection year and month
4.2 Packaging
The thread rolling packaging must be treated with anti-inducing measures before processing. The packaging must be firm and can prevent damage during transportation. JB/T 8364.5--96
Appendix A
Tolerances of crest height and root height of tapered thread (Appendix to the standard>
A] The tolerances of the crest height and root height of the thread of the thread are shown in Figure AI and Table A1. The crest height tolerance (composite threading) is the same as the bottom height tolerance. For the special requirements, the crest height and root height tolerance of the thread are shown in Table A1
The crest height and root height tolerance of the thread within 25.1u
The crest height and root height tolerance of the thread
The crest height and root height tolerance of the thread
A2 In actual production, the crest and root of the thread are generally in the shape of a conical extension, A2.! The four-dimensional thread is allowed to exceed the production page of the thread. Outside the band, but the two points of the return cannot leave the tooth tolerance zone, see Figure A2. A2.1 The bottom of the thread cannot exceed the bottom tolerance zone, see Figure 7 A Internal thread thread, the bottom of the thread is in the reverse area
JB/I8364.5-96
Appendix B
Basic dimensions and required deviations of thread grooves of chain pipes (recommended sweet records)
Figure 1 Basic dimensions and required deviations of thread grooves of chain pipes (recommended sweet records)
Basic ... 55*
-kr bne
Yashi distance high
Ruchen compilation difference (es4 on)
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