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NC horizontal turret
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GB/T 20960-2025
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| GB/T 20960-2007 | English | 289 |
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PDF similar to GB/T 20960-2025
Basic data | Standard ID | GB/T 20960-2025 (GB/T20960-2025) | | Description (Translated English) | NC horizontal turret | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J52 | | Classification of International Standard | 25.060.20 | | Word Count Estimation | 21,295 | | Date of Issue | 2025-08-29 | | Date of Implementation | 2026-03-01 | | Older Standard (superseded by this standard) | GB/T 20960-2007 | | Issuing agency(ies) | State Administration for Market Regulation; Standardization Administration of China | GB/T 20960-2025: NC horizontal turret---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT20960-2025
ICS 25.060.20
CCSJ52
National Standards of the People's Republic of China
Replaces GB/T 20960-2007
CNC horizontal turret tool post
Published on 2025-08-29
Implemented on 2026-03-01
State Administration for Market Regulation
The State Administration for Standardization issued a statement.
Table of Contents
Preface III
1.Scope 1
2 Normative References 1
3.Terms and Definitions 1
4.Types and Connection Dimensions 1
5 Requirements 3
6.Test Methods 13
7.Inspection 15
8.Markings, packaging, and accompanying documents 15
Figure 1 Connection Dimension 2
Figure 2 Static loading 15
Table 1 Connection Dimensions 2
Table 2 Radial runout of centering shaft diameter 4
Table 3.End face runout of the shoulder support surface 5
Table 4.Perpendicularity of the shoulder support surface to the bottom surface (6)
Table 5 Repeatability 7
Table 6.Offset of Tool Hole Axis in Working Position 8
Table 7 Parallelism of Tool Hole Axes in Working Position 9
Table 8.Offset of the tool groove in the working position (10°)
Table 9 Parallelism of tool mounting surfaces at various points in the working position 11
Table 10 Offset of tool mounting surface in working position (12)
Table 11 Tool Post Load Capacity 14
Table 12 Offset Moment 14
Table 13 Static loading torque 15
Foreword
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents".
Drafting.
This document replaces GB/T 20960-2007 "CNC Horizontal Turret Tool Post". Compared with GB/T 20960-2007, the main differences are in structural adjustments and...
Aside from editorial changes, the main technical changes are as follows.
---The scope has been changed (see Chapter 1, Chapter 1 of the.2007 edition);
---The repeatability tolerance for item G4 has been changed (see Table 5, Table 2 in the.2007 edition);
---The offset tolerance value of the tool groove in the working position in item G7 has been changed from "0.050" to "0.030" (see Table 8,.2007 edition).
(Table 2)
---The parallelism tolerance values of the axial and radial positioning grooves of the tool mounting surface in the working position of item G8 have been changed from "a)
Change "0.020" to "a) 0.010" and "c) 0.030" to "c) 0.020" (see Table 9, Table 2 of the.2007 edition);
---The standard for checking the cleanliness of the tool holder after assembly has been changed from "according to JB/T 9877" to "according to GB/T 25374".
The provisions (see 5.4.3,.2007 edition 4.4.3);
---The standard for the sealing and waterproofing test has been changed from "according to 13.2.5 of GB 4208-1993" to "according to..."
The provisions of GB/T 4208-2017, section 14.2.5 (see section 6.4, section 5.4 of the.2007 edition).
Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.
This document was proposed by the China Machinery Industry Federation.
This document is under the jurisdiction of the National Technical Committee on Standardization of Metal Cutting Machine Tools (SAC/TC22).
This document was drafted by. Yantai Huanqiu Machine Tool Equipment Co., Ltd., China General Technology Group Machine Tool Engineering Research Institute Co., Ltd., and Jiangsu...
Hongda CNC Technology Co., Ltd., Changzhou Genyuan CNC Equipment Co., Ltd., Changzhou Xinshu Machine Tool CNC Equipment Co., Ltd., Wenling City
Sanhe CNC Machine Tool Equipment Co., Ltd., Tengzhou Comprehensive Inspection and Testing Center, Huaiyin Institute of Technology, Yantai Standards and Metrology Inspection and Testing Center
Shandong Weida Machinery Co., Ltd., Shanghai Machine Tool Works Co., Ltd.
The main drafters of this document are. Yang Aiju, Jing Guofeng, Wu Peijian, Zang Kebao, Yu Chunping, Zhang Yuedong, Chen Qingfeng, Kang Xiaobo, and Xu Zhihua.
Ye Yunfu, Guo Feng, Chen Zhong, Zhou Hongtao, Ma Guangfen, Cheng Jie.
The release history of this document and the document it replaces is as follows.
---First published in.2007 as GB/T 20960-2007;
---This is the first revision.
CNC horizontal turret tool post
1.Scope
This document specifies the type and connection dimensions, requirements, test methods, inspection, and marking of CNC horizontal turret tool holders (hereinafter referred to as tool holders).
Packaging and accompanying documents.
This document applies to the design and manufacture of tool holders with a center height of 50mm~200mm and a rotation axis parallel to the mounting base. Other tool holders...
For reference, the connection dimensions are suitable for the newly designed tool holder.
2 Normative references
The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.
For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.
This document.
GB/T 4208-2017 Degrees of protection provided by enclosures (IP code)
GB/T 9061 General Technical Conditions for Metal Cutting Machine Tools
GB/T 17421.1-2023 General Rules for Machine Tool Inspection - Part 1.Geometric Accuracy of Machine Tools under No-Load or Quasi-Static Conditions
GB/T 17421.5 General Rules for Machine Tool Inspection - Part 5.Determination of Noise Emission
GB/T 25374 Method for measuring the cleanliness of metal cutting machine tools
JB/T 3207 General Technical Requirements for Packaging of Machine Tool Accessories
JB/T 9935 Preparation of accompanying technical documents for machine tool accessories
3.Terms and Definitions
This document does not contain any terms or definitions that need to be defined.
4.Types and Connection Dimensions
4.1 Type
4.1.1 Tool holders are classified into Type I and Type II according to their functions.
Type I bidirectional indexing tool post;
Type II unidirectional indexing tool post.
4.1.2 The tool post is mainly defined by the height of the center of the rotation axis.
4.2 Connection Dimensions
The connection dimensions of the tool holder are shown in Figure 1 and Table 1.Special requirements can be agreed upon by the manufacturer and the user.
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GB/T 20960-2025: NC horizontal turret
Status: Valid
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