JJF 1345-2012_English: PDF (JJF1345-2012)
| Standard ID | USD | BUY PDF | Lead-Days | Standard Title (Description) | Status |
| JJF 1345-2012 | 579 |
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Calibration Specification for Cylindrical Thread Gauges
| Valid |
| JJF 1345-1990 | 199 |
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O.T.N. of Exposure Primary Standard for γ-rays
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| Standard ID | JJF 1345-2012 (JJF1345-2012) | | Description (Translated English) | Calibration Specification for Cylindrical Thread Gauges | | Sector / Industry | Metrology & Measurement Industry Standard | | Classification of Chinese Standard | A52 | | Classification of International Standard | 17.040 | | Word Count Estimation | 25,239 | | Older Standard (superseded by this standard) | JJG 888-1995 | | Quoted Standard | JJF 1071-2010; GB/T 3934-2003; GB/T 14791-1993; GB/T 27025 | | Adopted Standard | EURAMET/cg-10/v.01-2007, NEQ; DKD-R 4-3-2003, NEQ | | Issuing agency(ies) | State Administration of Quality Supervision, Inspection and Quarantine | | Summary | This standard applies to symmetrical straight flank tooth type cylindrical thread gauge calibration. |
JJF 1345-2012
Calibration Specification for Cylindrical Thread Gauges
People's Republic of China National Metrology Technical Specifications
Cylindrical thread gauge calibration specification
Issued on. 2012-04-17
2012-10-17 implementation
The State Administration of Quality Supervision, Inspection and Quarantine released
Cylindrical thread gauge calibration specification
es
Instead of JJG888-1995
Focal point. the National Technical Committee of length measuring geometry
The main drafting units. China Institute of Metrology
Liaoning Provincial Institute of Metrology
Participated in the drafting unit. Chengdu into a tool Group Co., Ltd.
This specification length measuring geometry commissioned the National Technical Committee is responsible for interpretation
The main drafters of this specification.
Wang farming (China Institute of Metrology)
Pei Limei (China Institute of Metrology)
Shizuo De (Liaoning Provincial Institute of Metrology)
Zhang Yu (Liaoning Provincial Institute of Metrology)
Drafters participate.
Wang Ying (Chengdu into a tool Group Co., Ltd.)
table of Contents
Introduction (Ⅱ)
1 Scope (1)
2. References (1)
3 Terms (1)
4 Overview (1)
5 Metrological characteristics (1)
5.1 Metrological characteristics and symbols (1)
5.2 Metrological characteristics calibration combination (2)
6 calibration conditions (3)
Environmental conditions 6.1 (3)
6.2 standard instruments and other equipment (3)
7 calibration items and calibration methods (3)
7.1 Calibration portfolio (3)
7.2 Calibration method (3)
8 calibration results expression (7)
9 Recalibration interval (7)
APPENDIX A small ring work and general purpose working ring gauge calibration (8)
Appendix B Uncertainty Evaluation diameter measurement sample (9)
Calculation Examples Appendix C diameter (14)
Appendix D calibration records and certificates within the page format (15)
Appendix E list of symbols for use in specifications (18)
introduction
The reference to the following specification drafting.
The European Federation of National Metrology Institute (EuropeanAssociationofNationalMetrologyInstitutes)
Calibration Guide. mechanical measurement gauge diameter cylindrical threaded guide (EURAMET/cg-10/v.01. Deter-
minationofPitchDiameterofParalelThreadGaugesbyMechanicalProbing, July2007)
German Calibration Laboratory (DKD) guide DKD-R4-3.2003 section 4.8. dimensional measuring instruments calibration
Standard. threaded barrel set regulations, work regulations and master gauge calibration (RichtlinieDKD-R4-3Blatt4.8Kalibri-
erenvon Messmittelnfürgeometrische Messgröβen. Kalibrierenvonzylindrischen
Gewinde-Einsteldornen, Gewinde-Lehrdornenund-Prüfdornen, 2003)
The specification for the revision, instead of JJG888-1995 "Cylindrical thread gauge."
Compared with JJG888, in addition to editorial changes, the major technical changes are as follows.
Metrological characteristics --- calibration includes only thread gauge diameter values parameters directly impact. diameter, single tooth side
Angle, pitch and pitch accumulated error. Inspection of metrological characteristics, such as hardness, surface roughness, etc. are not included.
--- For metrological characteristics set combinations can be calibrated clear part of the metrological characteristics according to need to select combinations.
Effect --- diameter of the probe components considered by the laboratory as uncertainty depending on the method used.
Cylindrical thread gauge calibration specification
1 Scope
This standard applies to symmetrical straight tooth flank Cylindrical thread gauge calibration.
2. References
This specification refers to the following documents.
JJF 1071-2010 National Calibration Specifications writing rules
GB/T 3934-2003 Technical requirements common thread gauge
GB/T 14791-1993 threaded term
GB/T 27025 testing and calibration laboratories General requirements
For dated references, only the dated edition applies to this specification; undated reference documents
Member, the latest edition (including any amendments) applies to this specification.
3 Terms
The term cylindrical threaded see GB/T 3934-2003, GB/T 14791-1993.
4 Overview
Cylindrical thread gauge is internal and external thread cylindrical element size boundary conditions for a comprehensive examination of measuring instruments, with
The control elements threaded barrel limit sizes.
Elements that constitute threaded barrel shown in Figure 1.
Figure 1 threaded barrel elements
d2- diameter; d- large diameter; d1- trails; P- pitch; α1, α2- flank angle; α- tooth type angle, α = α1 α2
Note. The figure graphics and symbols apply to external threads.
Internal thread diameter, large diameter, small diameter symbols are denoted as D2, D, D1, the same as the rest of the external thread.
5 Metrological characteristics
5.1 Metrological characteristics and symbols
Metrological characteristics and symbols shown in Table 1.
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