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JJF 1684-2017 English PDF

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US$329.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJF 1684-2017: Calibration Specification for Comparators for Measuring the Diameter, Angle and Straightness of Bearings Tapered Roller
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJF 1684-2017	329	Add to Cart	3 days	Calibration Specification for Comparators for Measuring the Diameter, Angle and Straightness of Bearings Tapered Roller	Valid

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Basic data

Standard ID: JJF 1684-2017 (JJF1684-2017)
Description (Translated English): Calibration Specification for Comparators for Measuring the Diameter, Angle and Straightness of Bearings Tapered Roller
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A52
Word Count Estimation: 14,198
Date of Issue: 2017-11-20
Date of Implementation: 2018-05-20
Older Standard (superseded by this standard): JJG 380-1995
Regulation (derived from): AQSIQ Notice 2017 No. 103
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine

JJF 1684-2017: Calibration Specification for Comparators for Measuring the Diameter, Angle and Straightness of Bearings Tapered Roller

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Bearings Tapered roller diameter, angle and straightness comparison measuring instrument calibration specification) National Metrology Technical Specification of the People's Republic Bearing tapered roller diameter, angle and Straightness comparison measuring instrument calibration specification Released on.2017-11-20 2018-05-20 implementation The General Administration of Quality Supervision, Inspection and Quarantine issued Replace JJG380-1995 Focal Point. National Geometric Quantity Engineering Measurement Technology Committee Main drafting unit. Shandong Institute of Metrology Zaozhuang City Metrology and Testing Institute Participated in the drafting unit. Jinan Railway Bureau Metrology Institute Luoyang LYC Bearing Co., Ltd. Guizhou Metrology and Testing Institute This specification entrusts the National Geometric Quantity Engineering Parametric Measurement Technical Committee to explain The main drafters of this specification. Gao Wei (Shandong Institute of Metrology) Jia Minqiang (Shandong Institute of Metrology) Ding Jie (Zhazhuang City Metrology and Testing Institute) Qi Jun (Mountain Research Institute of Metrology) Participate in the drafters. Sun Li (Jinan Railway Bureau Metrology Institute) Pang Huaqi (Luoyang LYC Bearing Co., Ltd.) Jiang Guifang (Guizhou Metrology and Testing Institute)

Introduction (II) 1 Scope (1) 2 References (1) 3 Overview (1) 4 Measurement characteristics (2) 4.1 Surface roughness of work surface and side baffle face (2) 4.2 Flatness of the work surface of the workbench and the working surface of the side baffle (2) 4.3 Straightness of the slide along the guide rail (2) 4.4 indication variability (2) 4.5 indication error (2) 5 Calibration conditions (2) 5.1 Environmental conditions (2) 5.2 Calibration items and measurement standards and other equipment (2) 6 Calibration method (2) 6.1 Surface roughness of work surface and side baffle face (3) 6.2 Flatness of work surface and side baffle face (3) 6.3 Straightness of the slide along the guide rail (3) 6.4 indication variability (3) 6.5 indication error (3) 7 Calibration result expression (4) 8 re-study interval (4) Appendix A Measurement Error Measurement of Diameter Difference of Bearing Tapered Roller Diameter, Angle and Straightness Result uncertainty assessment (5) Appendix B Calibration page information and format (7)

Introduction

JJF 1071-2010 "National Metrology Calibration Specification Writing Rules", JJF 1001-2011 "General Measurement Terms and Definition", JJF 1059.1-2012 "Measurement and Expression of Measurement Uncertainty", JJF 1094-2002 "Measuring Instruments Sexual Assessments, which together form the basic series of specifications that support the revision of this calibration specification. This specification is a revision, replacing JJG380-1995 "bearing tapered roller diameter, angle, straightness measuring instrument". Compared with JJG380-1995, the main technical changes except editorial changes are as follows. --- According to JJG63-2007 "Knife-shaped ruler", the requirements of level 0 and level 1 were cancelled. --- Change the standard for measuring the "straightness of the carriage along the guide rail" to "inductive micrometer and special flat ruler". --- Change the "measurement repeatability" in the original procedure to "indicative variability". The measurement method was changed to "in the standard circle The same position of the column is measured five times repeatedly, and the difference between the maximum value and the minimum value is the indication variability of the measurement point. --- Simplified calculation formula for indication error. --- Added the content of the page format in the calibration certificate. The previous versions of this specification were released. ---JJG380-1995. Bearing tapered roller diameter, angle and Straightness comparison measuring instrument calibration specification

1 Scope

This specification applies to bearing tapered rollers with graduation values of 0.0002mm, 0.0005mm and 0.001mm. Diameter, angle and straightness comparison meter calibration.

2 reference files

This specification refers to the following documents. JJG39 mechanical comparator JJG118 torsion spring comparator GB/T 307.2-2005 Principles and methods for measurement and inspection of rolling bearings For dated references, only dated versions apply to this specification; undated quotations The latest version (including all amendments) applies to this specification.

3 Overview

Bearing tapered roller diameter, angle and straightness comparison measuring instrument (hereinafter referred to as measuring instrument) is according to tapered roller Bearing manufacturing process, in the process of manufacturing, using a method compared with tapered roller standard parts, measuring tapered roller Instrument for sub diameter, angle and straightness. The shape and structure of common instruments are shown in Figure 1. The indicator in the figure is generally based on the machine. Mechanical comparator or torsion spring comparator. Figure 1 Schematic diagram of bearing tapered roller diameter, angle and straightness measuring instrument 1-indicator; 2-arm; 3-side baffle; 4-table; 5-slide; 6-rail; 7-base ......

Image

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJF 1684-2017_English be delivered?

Answer: Upon your order, we will start to translate JJF 1684-2017_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJF 1684-2017_English with my colleagues?

Answer: Yes. The purchased PDF of JJF 1684-2017_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.