JB/T 9939.1-1999 This standard is a revision of ZB J52 009.1-89 "Tap chuck types and parameters". During the revision, only editorial changes were made according to relevant regulations, and the main technical content remained unchanged. This standard is part of the JB/T 9939 "Tap chuck" series of standards, which includes the following two parts: JB/T 9939.1-1999 Tap chuck types and parameters JB/T 9939.2-1999 Tap chuck technical conditions This standard specifies the types and parameters of tap chucks. This standard applies to newly designed machine tap chucks with safety overload protection mechanisms. This standard was first issued in 1983 as JB 3492-83 and first revised in 1989 as ZB J52 009.1-89. JB/T 9939.1-1999 Tap chuck types and parameters JB/T9939.1-1999 Standard download decompression password: www.bzxz.net

ICS25.060.20
Machinery Industry Standard of the People's Republic of China
JB/T9939.1-1999
Types and parameters of tap chucks
Published on May 20, 1999
National Bureau of Machinery Industry
Implementation on January 1, 2000
JB/T9939.1-1999
This standard is a revision of ZBJ52009.1-89 "Types and parameters of tap chucks". Its main technical content has not changed, and it has only been re-edited according to relevant regulations.
Differences between this standard and ZBJ52009.1-89: Footnote 1 is added in Table 2). This standard is part of the series of standards for tap chucks. JB/T9939, under the general title of "Tap chucks", includes the following two parts: Part I (i.e. JB/T9939.1): Types and parameters: Part II (i.e. JB/T9939.2): Technical conditions. This standard replaces ZBJ52009.189 from the date of implementation. This standard is proposed by the National Technical Committee for Standardization of Metal Cutting Machine Tools. This standard is under the jurisdiction of the Machine Tool Accessories Branch of the National Technical Committee for Standardization of Metal Cutting Machine Tools. The responsible drafting unit of this standard: Shanghai Machine Tool Accessories Factory No. 1. The participating drafting units of this standard: Tianjin Machine Tool Accessories Factory, Guangzhou Tool Factory, Dalian Machine Tool Accessories Factory, etc. The main drafters of this standard: Zhong Yude, Shi Miqing, Zhuang Tianrong, Li Runde, Zhang Shijie. This standard was first issued in 1983 and revised for the first time in 1989. 1 Scope
Machinery Industry Standard of the People's Republic of China
Tap Chuck
Types and Parameters
This standard specifies the types and parameters of tap chucks. This standard applies to newly designed machine tap chucks with a safety overload protection mechanism. 2 Referenced Standards
JB/T9939.1—1999
Replaces ZBJ52009.1—89
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 will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T1443—1996
GB/T3837.3—1983
GB/T4267—1984
GB/T109441989
3 Type
Self-clamping taper for machine tools and tool shanks
Machine tools 7:24 Taper connection tools Taper shank Straight shank Rotary tools Shank diameter and transmission square head Size 7:24 taper tool shank for automatic tool changing machine tools. Taper shank tap chucks of No. 40, 45 and 50 consist of two parts: the chuck shank and the tap sleeve. They are divided into three types according to the taper type of the connecting shank: a) Type I: Morse taper shank tap chuck, see Figure 1: b) Type I: 7:24 taper shank tap chuck, see Figure 2: c) Type III: 7:24 taper shank tap chuck for automatic tool changing machine tools, see Figure 3. Approved by the State Machinery Industry Bureau on May 20, 1999, the chuck part is Morse taper shank tap chuck, thread flap sleeve, and implemented on January 1, 2000. 4 Parameters: JB/T9939.1-1999, Chuck shank, Figure 27: 24 taper shank tap chuck, filling head shank, this chuck has the following specifications: Figure 3: 7: 24 taper shank tap chuck for automatic tool changing machine tools, 4.1 The main parameter of the tap chuck is the maximum tapping diameter. 4.2 The parameters of the tap chuck shall comply with the provisions of Table 1. The Morse taper shank of type I shall comply with GB/T1443; the 7:24 taper shank of type II shall comply with GB/T3837.3; the 7:24 taper shank of type II shall comply with GB/T10944.
Maximum tapping diameter
Tapping range
Compensation amount
F (pressure) direction
F (pulling) direction
M3~M12
4.3 The parameters of the tap sleeve are shown in Figure 4 and Table 2. 2
M5~M16
M12~M24
M14~M33
M24~M42
M42~M64
M64~M80
Tapping diameter
Tapping diameter
Tapping diameter
JB/T9939.1-1999
Figure 4 Tap sleeve
Note: di, D, L dimensions are selected according to the maximum tapping diameter. M5
1) The basic size of port 4 can also be selected according to the series value in GB/T4267, and the limit deviation can be increased to D11M14Www.bzxZ.net
Tap sleeve marking example
JB/T9939.1-1999
The tap sleeve with tapping diameter M24 and connection diameter d,=30mm is: sleeve M24-30JB/T9939.1-1999
The tap sleeve with tapping diameter M10, connection diameter d,=19mm, port A=6.30mm (the smaller value) is: sleeve (M10-19)
JB/T9939.1—1999
People's Republic of China
Mechanical Industry Standard
Tap chuck types and parameters
JB/T 9939.1-1999
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry (No. 2 Shouti South Road, Beijing
Postal Code 100044)
Word count 10,000
1/16 Printing sheet 1/2
Format 880×1230
First edition in July 1999 First printing in July 1999 Number of copies 1-500
Price 5.00 yuan
99-544
666166
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