tailieunhanh - Dimensioning and Tolerancing Part 15

Tham khảo tài liệu 'dimensioning and tolerancing part 15', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | SYMBOL FOR ASME ISO STRAIGHTNESS FLATNESS CIRCULARITY o CYUNDRICITY XX PROFILE OF A LINE PROFILE OF A SURFACE ALL AROUND proposed ANGULARITY s PERPENDICULARITY PARALLELISM POSITION CONCENTRICITY concentricity and coaxiality in ISO SYMMETRY CIRCULAR RUNOUT x x TOTAL RUNOUT xx XX AT MAXIMUM MATERIAL CONDITION AT LEAST MATERIAL CONDITION REGARDLESS OF FEATURE SIZE NONE NONE PROJECTED TOLERANCE ZONE TANGENT PLANE T proposed FREE STATE DIAMETER 0 0 BASIC DIMENSION theoretically exact dimension in ISO fscl REFERENCE DIMENSION auxiliary dimension in ISO 50 50 DATUM FEATURE or MAY BE FILLED OR NOT FILLED FIG. C-3 COMPARISON OF SYMBOLS 212 SYMBOL FOR ASME ISO DIMENSION ORIGIN Ị - FEATURE CONTROL FRAME fr A B c 1 g A B c CONICAL TAPER j SLOPE COUNTERBORE SPOTFACE 1 1 proposed COUNTERSINK proposed DEPTH DEEP T T proposed SQUARE DIMENSION NOT TO SCALE 15 15 NUMBER OF PLACES 8X 8X ARC LENGTH 105 105 RADIUS R R SPHERICAL RADIUS SR SR SPHERICAL DIAMETER S0 S0 CONTROLLED RADIUS CR NONE BETWEEN NONE STATISTICAL TOLERANCE st NONE DATUM TARGET or or TARGET POINT X MAY BE FILLED OR NOT FILLED FIG. C-3 COMPARISON OF SYMBOLS CONT D 13 APPENDIX D FORMER PRACTICES This Appendix is not a part of ASME . DI GENERAL The purpose of this Appendix is to identify and illustrate former symbols terms and methods of dimensioning featured in ANSI . For information on changes and improvements see Appendix A and the Foreword. The following information is provided to assist in the interpretation of existing drawings on which former practices may appear. D2 DEFINITION FOR FEATURE OF SIZE The former definition for a feature of size was stated as follows One cylindrical or spherical surface or a set of two plane parallel surfaces each of which is associated with a size dimension. The former definition did not specify a requirement for the two parallel surfaces to be opposed. For the present definition see para. . D3 APPLICABILITY OF RFS MMC AND LMC In .