JB/T 3550.4-1999 This standard is a revision of JB 4069-85 "Dimensions of Spindle Ends of Mobile Cylinder Boring Machines". During the revision, it was only renamed "Spindle Ends of Cylinder Boring Machines" according to the provisions of GB/T 15375-1994 "Methods for Compiling Models of Metal Cutting Machine Tools", and the technical content has not changed. This standard is part of the JB/T 3550 "Cylinder Boring Machine" series of standards, which includes the following four parts: JB/T 3550.1-1999 Cylinder Boring Machine Parameters JB/T 3550.2-1999 Cylinder Boring Machine Accuracy Inspection JB/T 3550.3-1999 Cylinder Boring Machine Technical Conditions JB/T 3550.4-1999 Cylinder Boring Machine Spindle Ends This standard specifies the spindle ends of cylinder boring machines. This standard applies to newly designed cylinder boring machines. This standard was first issued in December 1983. JB/T 3550.4-1999 Spindle end of cylinder boring machine JB/T3550.4-1999 Standard download decompression password: www.bzxz.net

ICS25.080.20
Machinery Industry Standard of the People's Republic of China
JB/T3550.4—1999
Cylinder Boring Machine
Published on 1999-05-20
Spindle End
Implemented on 2000-01-01
State Bureau of Machinery Industry
JB/T3550.4—1999
This standard is a revision of JB406985 "Spindle End Dimensions of Mobile Cylinder Boring Machines". During the revision, only editorial changes were made according to relevant regulations. According to the provisions of GB/T15375-1994 "Method for Compiling Models of Metal Cutting Machine Tools", the standard name was changed to "Spindle End of Cylinder Boring Machine". Other technical contents have not changed. This standard is part of the JB/T3550 series of standards for cylinder boring machines, which includes the following four parts: JB/T 3550.1—1999
JB/T3550.2—1999
JB/T3550.3—1999
JB/T 3550.4—1999
Parameters of cylinder boring machines
Precision inspection of cylinder boring machines
Technical conditions of cylinder boring machines
Cylinder boring machines
Spindle end
Appendix A and Appendix B of this standard are both appendices of the standard. This standard replaces JB406985 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 Boring and Drilling Machine Branch of the National Technical Committee for Standardization of Metal Cutting Machine Tools. The responsible drafting units of this standard are Xi'an Special Machine Tool Factory and Shanghai Aviation Equipment Factory. This standard was first issued in December 1983. 1
1 Scope
Machinery Industry Standard of the People's Republic of China
Cylinder Boring Machine
Spindle End
This standard specifies the spindle end of the cylinder boring machine. This standard applies to newly designed cylinder boring machines. 2 Referenced Standards
JB/T3550.4—1999
Replaces JB406985
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/T1801-1979 Tolerance and fit dimensions to 500mm hole, shaft tolerance zone and fit 3A type spindle end dimensions
A type spindle end type is shown in Figure 1, and the dimensions shall comply with the provisions of Table 1. The tool bar dimensions shall comply with the provisions of A1 in Appendix A, and the boring tool shall comply with the provisions of Appendix B.
Approved by the State Machinery Industry Bureau on May 20, 1999
Implementation on January 1, 2000Www.bzxZ.net
Maximum boring hole diameter
Eccentricity of tool bar hole E
Tool bar hole diameter D
Tool setting constant K
JB/T3550.4-1999
Note: The limit deviation of D is determined according to H8 specified in GBT18011979. B-type spindle end dimensions
B-type spindle end type is shown in Figure 2, and the dimensions shall comply with the provisions of Table 2. The tool bar dimensions shall comply with the provisions of A2 in Appendix A, and the boring tool shall comply with the provisions of Appendix B.
Maximum boring hole diameter
Tool bar hole eccentricity E
Tool bar hole width B
Tool bar hole height H
Tool setting constant K
1The limit deviation of B and H is determined according to H9 specified in GBT1801-1979. 2The value of tool setting constant K is applicable to mobile boring cylinder machines using external tool setting. 2
A-type tool bar dimensions
A-type tool bar dimensions are shown in Figure A1 and Table A1.
Maximum boring diameter
Eccentricity of tool holder hole E
Tool holder diameter d
Boring hole diameter D
Eccentricity of boring hole e
JB/T3550.4—1999
Appendix A
(Appendix of standard)
Note: The limit deviations of D, and d are determined according to H8 and h8 specified in GBT1801-1979 respectively. 0
Tool holder dimensions for A2B type
Tool holder dimensions for B type are shown in Figure A2 and Table A2.
Maximum boring diameter
Eccentricity of tool hole E
Tool bar width b
Tool bar height h
Boring hole diameter D,
Eccentricity of boring hole e
JB/T 3550.4—1999
Note: The limit deviations of b, h and D, shall be determined according to h9, h9 and H8 specified in GB/T1801-1979 respectively. 4
JB/T 3550.4—1999
Boring tool dimensions
See Figure B1 and Table B1 for boring tool dimensions.
Boring cutter diameter
Tool tip height
JB/T3550.4-1999
Appendix B
(Appendix to the standard)
Note: The limit deviation of d, is determined according to h8 specified in GB/T1801-19796
Mechanical industry standard
Cylinder boring machine spindle end
JB/T35504-1999
Mechanical industry standard of the Ministry of Machinery Industry Published by the Institute of Standardization Printed by the Institute of Standardization of the Ministry of Machinery Industry (No. 2, Shouti South Road, Beijing: Postal Code 100044)*
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