JJG 626-2003 English PDF

US$369.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJG 626-2003: Verification Regulation of Measuring Instrument for Axial Clearance of Ball Bearings
Status: Valid

JJG 626: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 626-2003	369	Add to Cart	3 days	Verification Regulation of Measuring Instrument for Axial Clearance of Ball Bearings	Valid
JJG 626-1989	319	Add to Cart	3 days	Verification Regulation of Instrument for Measuring Axial Clearance of Ball Bearing	Obsolete

Similar standards

JJG 818   JJG 517   JJG 1114   JJG 658   JJG 741   JJG 601   

Basic data

Standard ID: JJG 626-2003 (JJG626-2003)
Description (Translated English): Verification Regulation of Measuring Instrument for Axial Clearance of Ball Bearings
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A52
Word Count Estimation: 14,174
Date of Issue: 2003-09-23
Date of Implementation: 2004-03-23
Older Standard (superseded by this standard): JJG 626-1989
Quoted Standard: JJF 1001-1998; JJF 1059-1999; GB 307.2-1995; JB/T 5307-1991; JB/T 6643-1993; JJG 34-1996; JJF 1094-2002
Regulation (derived from): State Administration of Quality Supervision, Inspection and Quarantine Notice 2003 No. 106
Summary: This standard applies to the measured bearing outer diameter D of (9 ~ 250) mm, indexing is ball bearing axial clearance gauge 1��m (referred to clearance meter, the same below) of the first test, follow-up testing and use inspection.

JJG 626-2003: Verification Regulation of Measuring Instrument for Axial Clearance of Ball Bearings

---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.
Verification Regulation of Measuring Instrument for Axial Clearance of Ball Bearings National Metrology Verification Regulations of the People's Republic Ball bearing axial clearance measuring instrument Released on.2003-09-23 2004-03-23 implementation The General Administration of Quality Supervision, Inspection and Quarantine issued Replace JJG 626-1989 This regulation was approved by the General Administration of Quality Supervision, Inspection and Quarantine on September 23,.2003, and It will take effect on March 23,.2004. Focal Point. National Geometric Quantity Engineering Measurement Technology Committee Drafting unit. Shandong Institute of Metrology This regulation entrusts the National Geometric Quantity Engineering Parametric Measurement Technical Committee to explain The main drafters of this procedure. Li Yongzuo (Shandong Institute of Metrology) Jiang Yanbo (Shandong Institute of Metrology) Xia Yuhong (Shandong Institute of Metrology)

table of Contents

1 Scope (1) 2 Citations (1) 3 Overview (1) 4 Metrology performance requirements (1) 4.1 Loading force (1) 4.2 Pressing table and pressure ring (1) 4.3 indicator table (1) 4.4 Maximum allowable error (1) 4.5 Indication variability (1) 5 General technical requirements (2) 5.1 Appearance (2) 5.2 Interaction of various parts (3) 6 measuring instrument control (3) 6.1 Verification conditions (3) 6.2 Verification project (3) 6.3 Verification method (3) 6.4 Processing of verification results (5) 6.5 verification period (5) Appendix A Clearance Standards and Extreme Values Outline and Technical Requirements (6) Appendix B Analysis of Uncertainty in Measurement Errors (7) Appendix C Format of verification certificate and verification result page (9) Ball bearing axial clearance measuring instrument verification procedures

1 Scope

This procedure is applicable to the axial clearance of ball bearings with an outer diameter D of the tested bearing (9~250) mm and a graduation value of 1μm. The first test, subsequent verification and in-use test of the measuring instrument (referred to as the clearance device, the same below).

2 Citations

This procedure refers to the following documents. JJF1001-1998 General measurement terms and definitions JJF1059-1999 Measurement Uncertainty Evaluation and Representation GB 307.2-1995 Principles and methods for measurement and inspection of rolling bearings JB/T 5307-1991 General technical requirements for rolling bearing measuring instruments JB/T 6643-1993 Rolling bearing four-point contact ball bearing axial clearance JJG 34-1996 indicator table JJF1094-2002 Measuring instrument characteristic evaluation When using this procedure, care should be taken to use the current valid version of the above cited documents.

3 Overview

The clearance gauge is a special instrument for measuring the axial clearance of radial ball bearings. Its structure is mainly composed of indicator table and positioning machine Structure; the measuring principle is the outer ring of the fixed bearing, which is read by the indicator table by loading the upper and lower sides of the bearing inner ring respectively. Bearing clearance value. The basic shape and principle are shown in Figure 1 (instrument outline) and Figure 2 (instrument schematic).

4 Metrological performance requirements

4.1 Loading force The loading force does not exceed ±10% of the nominal value. 4.2 Pressing table and pressure ring 4.2.1 The surface roughness Ra of the pressure plate and pressure ring working surface is not more than 0.6μm. 4.2.2 The flatness of the working face of the pressure ring is not more than 10μm. 4.2.3 The parallelism of the two working faces of the pressure ring is not more than 20μm. 4.2.4 The distance between the working face of the upper pressure ring and the working surface of the lower pressure ring is not more than 25μm. 4.2.5 The relative position and movement range of the pressure table relative to the pressure ring is not less than the maximum clearance value measurable by the instrument. 4.3 indicator The indicator is in accordance with the relevant national metrological technical regulations. 4.4 Maximum allowable error The maximum allowable error is shown in Table 1. 4.5 indication variability ......

Image     

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJG 626-2003_English be delivered?

Answer: Upon your order, we will start to translate JJG 626-2003_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 JJG 626-2003_English with my colleagues?

Answer: Yes. The purchased PDF of JJG 626-2003_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.

Question 5: Should I purchase the latest version JJG 626-2003?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 626-2003 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.