JB/T 9989.1-1999 This standard is a revision of ZB J41 003.1-87 "Types and dimensions of trapezoidal thread taps". During the revision, only editorial changes were made according to relevant regulations, and the technical content remained unchanged. This standard is part of the JB/T 9989 "Trapezoidal thread taps" series of standards. This series of standards includes the following three parts: JB/T 9989.1: Types and dimensions JB/T 9989.2: Thread tolerances JB/T 9989.3: Technical conditions This standard specifies the types and dimensions of trapezoidal thread taps. This standard is applicable to trapezoidal thread taps (hereinafter referred to as taps) used for machining ordinary trapezoidal threads (according to JB/T 5796.1~5796.4-1986 "Trapezoidal threads"). The types of taps are divided into type I (short type) and type II (long type). This standard was first issued on the date of year. JB/T 9989.1-1999 Trapezoidal thread taps Part 1: Types and dimensions JB/T9989.1-1999 Standard download decompression password: www.bzxz.net

ICS25.100.50
Machinery Industry Standard of the People's Republic of China
JB/T9989.1-9989.3-1999
Trapezoidal thread taps
1999-05-20 Issued
National Bureau of Machinery Industry
2000-01-01 Implementation
JB/T 9989.1—[999
This standard is a static revision of the type and size of trapezoidal thread taps of ZBJ413.187. During the revision, the editorial performance was modified in accordance with relevant regulations, and the technical content remained unchanged. This standard is part of the JB/T99B9 series of standards for trapezoidal thread taps, which includes the following two parts: 3B9989.1-1999 Trapezoidal thread taps Part 1: Types and dimensions JB/T9989.2-1999
JR.T9989.3-1999
Trapezoidal thread taps Part 2: Beam tolerances Trapezoidal thread taps Part 3: Technical conditions This standard replaces 2B141003.1-8 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Tool Standardization. The responsible drafting unit of the standard is the Beijing Tool Research Institute. The main contributors to the standard are: Cha Nizhi, Xiao Jixing, Tao Zhenwei, Shi Shangxiao, Qiang Yang, Cha Qian, Fan
Machinery Industry Standard of the People's Republic of China
Trapezoidal Thread Taps
Part 1: Types and Dimensions
JB9989.1—1999
Transmission 23 111 003.187
This standard specifies the types and sizes of trapezoidal thread taps. This standard is used for 1 ordinary trapezoidal thread taps (joint (June/T5796.1-5796.4-1986)) (hereinafter referred to as threads).
The thread is divided into two types: I (short type, II long type), 2 referenced standards
The provisions contained in the following standards are used in the standard and constitute the provisions of this standard. At the time of publication of this standard, the versions shown are in effect. All standards are subject to revision and all departments using this standard should discuss and use the latest versions of the following standards: GB5796.1—1986 Trapezoidal tapping numbers
GB.T5796.2—1986 Trapezoidal tapping diameter and basic dimensions of trapezoidal threads in the 1980s
GB.T5796.3—1986
GB.T579.4—1986 Tolerances of trapezoidal threads
3 Types and dimensions
The taps are shown in Figure 1 and the dimensions are given in Table 1. Space is not determined
Guangzhou
Tr&× 1.5
Tr 12×3
Tr[4×3
(Type)
Approved by the National Machinery Industry Bureau on 1999-05-20
Heavy (Long Type)
2000-01-01Buy
Er16×4
Ir18×4
Tr 20×d
Tr22×5
Tr 24×5
Tr 26×5Www.bzxZ.net
Ir28×5
Tr 30xf
Ir32×6
Tr 34× 6
Ir36×6
Tr 38x
Ir 40×?
1r42×?
Tr 44×7
Tr6×8
Tr46×
Tr 0×3
：Suppose the production and supply of single wire stalls.
JB/T9989.11999
Table 1)
2 Grouped whole dimension support effect is determined by the manufacturer.
Type long type)
19:49
3 Small equal diameter grouped whole dimension, the first thick cone, the second thick cone, the tree part of the first cone should be marked with 1, 2...-to-bad marks to distinguish them. 1 Wire Yao straight groove is determined by the spiral blue production and towel manufacturer. 5 is the recommended size.
4 Marking example
Tr8x1.5 right-handed, H8 tolerance zone, single, single mosquito, length I type threaded wire is marked as trapezoidal screw Tr8×1.51-H8[R9989.1—19991r8×1.5 right-handed, H8 tolerance zone, single, single line, length Ugly type threaded wire is marked as: trapezoidal thread wire chain Tr8×.51H8JB:T9989.11999Tr30×12(P6) right-handed, H8 tolerance zone, two-piece, double line, length 1 type trapezoidal thread pliers are marked as trapezoidal thread effect paper Tr30×12(F6)I-H8JB8.1—[9
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