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GB/T 145-2001: Center holes Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 145: Historical versions
Similar standardsGB/T 145-2001: Center holes---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/GBT145-2001ranslated English of Chinese Standard. GB/T145-2001 NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 25.010 J 05 Replacing GB/T 145-1985 Center holes Issued on. JULY 20, 2001 Implemented on. MARCH 1, 2002 Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China Table of ContentsForeword... 3 1 Scope... 4 2 Types and sizes... 4ForewordIn this Standard, Type A center holes are equivalent to the type and size of the Type A center holes in the Appendix of the international standard ISO 866.1975 Centre drills for centre holes without protecting chamfers - Type A; Type B center holes are equivalent to the type and size of the Type B center holes in the Appendix of the international standard ISO 2540.1973 Centre drills for centre holes with protecting chamfer - Type B; and Type R center holes are equivalent to the type and size of the Type R center holes in the Appendix of the international standard ISO 2541.1972 Centre drills for centre holes with radius form - Type R. In this Standard, Type C center holes are equivalent to the German standard DIN 332/2-1970 Center holes 60° with thread for shaft ends for rotating electrical machines. This Standard is a revision of GB/T 145-1985. This Standard adds “Foreword”, “Chapter 1 Scope”, and “D2 size of Type C center holes” on the basis of the original standard. The article numbers and contents in each chapter have changed slightly. This Standard replaces GB/T 145-1985 from the date of implementation. This Standard was proposed by the China Machinery Industry Federation. This Standard shall be under the jurisdiction of the National Technical Committee for Standardization of Tools. Main drafting organization of this Standard. Chengdu Tool Research Institute. Main drafter of this Standard. Xia Qian. This Standard was first published in June 1959 and first revised in June 1985. Center holes1 ScopeThis Standard specifies the types and sizes of the Type A, Type B, Type C, and Type R center holes. This Standard applies to the Type A, Type B, Type C, and Type R center holes.2 Types and sizes2.1 The type of the Type A center hole is shown in Figure 1, and the sizes are given in Table 1. 2.2 The type of the Type B center hole is shown in Figure 2, and the sizes are given in Table 2. 2.4 The type of the Type R center hole is shown in Figure 4, and the sizes are given in Table 4. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 145-2001 be delivered?Answer: The full copy PDF of English version of GB/T 145-2001 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 145-2001_English with my colleagues?Answer: Yes. 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