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GB/T 5104-2008: The basic types and dimensions of hobs for involute splines 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 5104: Historical versions
Similar standardsGB/T 5104-2008: The basic types and dimensions of hobs for involute splines---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/GBT5104-2008NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 25.100.20 J 41 Replacing GB/T 5104-2004, GB/T 5105-2004 The basic types and dimensions of hobs for involute splines ISSUED ON: AUGUST 28, 2008 IMPLEMENTED ON: MARCH 01, 2009 Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the PRC; Standardization Administration of the PRC. Table of ContentsForeword ... 3 1 Scope ... 4 2 Normative references ... 4 3 Types and dimensions ... 5 4 Marking examples ... 7 Appendix A (Informative) Calculation dimensions of hob ... 8 Appendix B (Informative) Axial rack profile dimensions of hob ... 10ForewordThis Standard replaces GB/T 5104-2004 "The basic types and dimensions of hobs for 30 Degree pressure angle involute splines" and GB/T 5105-2004 "The basic types and dimensions of hobs for 45° pressure angle involute splines". Compared with GB/T 5104-2004 and GB/T 5105-2004, this Standard has the following technical differences: - Integrate GB/T 5104-2004 and GB/T 5105-2004. Appendix A and Appendix B of this Standard are informative appendices. This Standard was proposed by China Machinery Industry Federation. This Standard shall be under the jurisdiction of National Technical Committee 91 on Cutting Tools of Standardization Administration of China (SAC/TC 91). Drafting organization of this Standard: Chongqing Tool Factory Co., Ltd. Main drafters of this Standard: Dai Xin, Jiang Ning. The previous editions of the standard replaced by this Standard were released as follows: - GB 5104-1985, GB/T 5104-2004; - GB 5105-1985, GB/T 5105-2004. The basic types and dimensions of hobs for involute splines1 ScopeThis Standard specifies the basic types and dimensions of hobs for the overall involute splines with a modulus of 0.5 mm~10 mm and a pressure angle of 30° and of hobs for the overall involute splines with a modulus of 0.25 mm~2.50 mm and a pressure angle of 45°. This Standard is applicable to hobs for straight cylindrical involute splines with machined basic rack profiles according to GB/T 3478.1 and dimensions according to GB/T 3478.4 or GB/T 3478.2. A hob with a pressure angle of 30° is suitable for three accuracies of A, B, and C. A hob with a pressure angle of 45° is suitable for class C accuracy.2 Normative referencesThe following documents contain provisions which, through reference in this Standard, constitute provisions of this Standard. For the dated references, their subsequent amendments (excluding corrections) or revisions do not apply to this Standard. However, the parties who enter into agreement based on this Standard are encouraged to investigate whether the latest editions of these documents are applicable. For undated reference documents, the latest editions apply to this Standard. GB/T 3478.1 Straight cylindrical involute splines - Modules, basic rack profiles and tolerances (GB/T 3478.1-1995, eqv ISO 4156:1981) GB/T 3478.2 Straight cylindrical involute splines - 30° pressure angle dimensions tables (GB/T 3478.2-1995, neq ISO 4156:1981) GB/T 3478.4 Straight cylindrical involute splines - 45° pressure angle dimensions tables (GB/T 3478.4-1995, neq ISO 4156:1981) GB/T 6132 Milling cutters interchangeability dimensions for cutter arbors (GB/T 6132-2006, ISO 240:1994, IDT)3 Types and dimensions3.1 The basic types of hob for involute spline with a pressure angle of 30° are divided into two: type I and type II. Type I is a flat-addendum hob, suitable for processing external splines of flat dedendum. Type II is a round-addendum hob, suitable for processing external splines of round dedendum. 3.2 The structure types and dimensions of hob for involute spline with a pressure angle of 30° are in accordance with Figure 1 and Table 1. The structure types and dimensions of hob for involute spline with a pressure angle of 45° are in accordance with Figure 1 and Table 2. See Appendix A for the calculation dimensions of the hob. See Appendix B for the axial dimensions of the hob. 3.3 The hob is made as a single-head right-handed (can be made as a left- handed according to user requirements). The chip pocket is a straight flute parallel to the hob axis. 3.4 The dimensions and tolerances of the spline are in accordance with GB/T 6132. 3.5 The diameter d1 of the pillow block is determined by the manufacturer itself. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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