1 Scope
This part of JB/T 5000 specifies general requirements of cutting and tolerance without indication; and specific requirements on key groove, pore diameter and hole distance, center hole, tolerance without indication and shape of tool permitted for selection etc.
This part is applicable to part cutting of heavy machinery product.
All the product drawing and technological document, if without special requirement, shall meet the requirements in this part.
2 Normative References
The provisions in following documents, through reference in this Part of JB/T 5000, constitute the clauses of this Part. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties who enter into agreement according to this Part are encouraged to research whether the latest editions of these references can be applied or not. For undated reference, its latest edition of the normative document is applicable to this part.
GB/T 3 Run-outs, Undercuts and Chamfers for General Purpose Metric Screw Threads (GB/T 3-1997,eqv ISO 3508:1976, ISO 4755: 1983)
GB/T 197-2003 "General Purpose Metric Screw Threads-Tolerances" (ISO 965-1: 1998, MOD)
GB/T 1184- 1996 "Geometrical Tolerance-Geometrical Tolerances for Features Without Individual Tolerance Indications" (eqv ISO 2768-2: 1989)
GB/T 1804-2000 General Tolerances - Tolerances for Linear and Angular Dimensions without Individual Tolerance Indication (eqv ISO 2768-1:1989 )
GB/T 5277-1985 Fasteners; Clearance Holes for Bolts and Screws (eqv ISO 273:1979)
Contents
Foreword i
1 Scope
2 Normative References
3 General Requirements
4 Tolerance without indication
4.1 Length Dimension, Semi-diameter of Rounding and Height, Angular Dimension of Chamfer
4.2 Tolerance of Form and Position
5 Symmetry Tolerances without Indication of Key Groove
6 Tolerance without Indication for Location Degree of Bolt and Plain Hole
7 Thread
8 Center Hole
9 Surface Roughness without Indication
10 Specification that is Permitted for Processing According to Shape of Tool
11 Rolling
11.1 Methods and Purpose for Rolling
11.2 Preparation for Rolling
11.3 Surface of Rolling
