JIS-B-7503-1997-R2008-ENG.pdf

STD*JIS B 7503-ENGL 1777 W 4733b618 055133h't T37 $I J IS JAPANESE I N DUSTR IAL STANDARD Translated and Published by Japanese Standards Association JIS B 7503:19 Dial gauges ICs 17.040.30 Descriptors : dial gauges Reference number : JIS B 7503 : 1997 (E) 8 S Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:45:45 MDTNo reproduction or networking permitted without license from IHS -,-,- B 7503:1997 Foreword This translation has been made based on the original Japanese Industrial Standard revised by the Minister of International Trade and Industry through deliberations at Japanese Industrial Standards Committee in accordance with the Industrial Standardization Law. Consequently, JIS B 7503:1992 is replaced with JIS B 7503:1997. Date of Establishment: 1953-02-27 Date of Revision: 1997-10-20 Date of Public Notice in Official Gazette: 1997-10-20 Investigated by: Japanese Industrial Standards Committee Divisional Council on Precision Machinery JIS B 7503:1997, First English edition published in 1998-05 Translated and published by: Japanese Standards Association 4-1-24, Akasaka, Minato-ku, Tokyo, 107-8440 JAPAN 4 ' . In the event of any doubts arising as to the contents, the original JIS is to be the final authority. O JSA 1998 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. Printed in Japan Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:45:45 MDTNo reproduction or networking permitted without license from IHS -,-,- ST3*JIS B 7503-ENGL 1997 4933b08 855U3bb BOT JAPANESE INDUSTRIAL STANDARD Dial gauges JIS B 7503 : 1997 Introduction This Japanese Industrial Standard is made on the basis of ISO/R 463, Dial gauges reading in 0.01 mm, 0.001 in and 0.0001 in published in 1965 by changing partially a part of its technical contents and including the items not included in the corresponding International Standard (inspection, designation and marking of products) as the Japanese Industrial Standard. 1 Scope This Japanese Industrial Standard specifies the dial gauges of 0.01 mm, 0.002 mm and 0.001 mm in scale interval and 100 times, 500 times and 700 times or more in magnification (hereafter referred to as “dial gauge”). This applies to the dial gauges of 60 mm or under in outer frame and 10 mm or under in measuring range in the case of 0.01 mm and 0.002 mm in scale interval and 5 mm or under in measuring range in the case of 0.001 mm in scale internai. 2 Normative reference The following standards contain provisions which, through refer- ence in this Standard, constitute provisions of this Standard. The latest editions of them apply * JIS Z 8103 IS0 14253-1 Glossary of terms used in instrumentation Geometrical product specification (GPS) - Inspection by measurement of workpieces and measuring instruments - Part 1: Decision rules for prov- ing conformance or non-conformance with specifications 3 the following definitions apply : Definitions For the purpose of this Standard, the definitions given in JIS Z 8103 and dial gauge Measuring instrument in which a plunger having a contact point transmits its straight movement parallel to the circular dial to the long pointer at the end part by suitable mechanical means and this long pointer indicates the displacement of the plunger on the scales graduated in equal divisions over the whole circumference. indication error Value obtained by subtracting the true value to be indicated from the reading of the dial gauge in both directions at the times when the plunger enters and goes out (Attached Fig. 1). Remarks : It is called instrumenta1 error as well. maximum permissible error of indication Value of limit to which indication error is permit ted. retrace error The maximum value of the differences of indications for the same measuring quantity when the plunger enters and goes out (Attached Fig. 1). repeatability The maximum difference between the indication values when the measurement is repeated at a given point within the measuring range. adjacent error The maximum value of the difference between the indication errors at two positions distant by 1/10 turn at both times when the plunger enters and goes out (Attached Fig. 1). Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:45:45 MDTNo reproduction or networking permitted without license from IHS -,-,- STD-JIS B 7503-ENGL 1797 Li733hfl8 055133b7 7Yb W 2 B 7503 : 1997 4 Design features The main parts of a dial gauge as shown in Fig. 1. 4 c Remarks: This Figure is to show the name of each part and not to show the standard of shape and construction. Fig. 1 Name of main parts 5 Shapes and dimensions 5.1 dial gauge shall be as shown in Fig. 2. Shapes and dimensions of main parts The shapes and dimensions of main parts of Unit : mm I 9 5 8 max. With ear metal Without ear metal Fig. 2 Shapes and dimensions of main parts Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:45:45 MDTNo reproduction or networking permitted without license from IHS -,-,- 3 B 7503 : 1997 5.2 Dimensions of contact point attaching part and contact point end The dimensions of contact point attaching part and contact point end of dial gauge shall be as shown in Fig. 3. Unit : mm Fig. 3 Dimensions of contact point attaching part and contact point end 5.3 Scales and long pointer 5.3.2 Length of scale line and numbering of scale In the case of the dial gauge of 0.01 mm scale interval every fifth scales are indicated with longer lines than other scales and every 10th scales are given the numerals corresponding to the scale lines. In the case of the dial gauge of 0.002 mm scale intervals, every fifth scales are given the numerals corresponding to the scale lines indicated with longer lines than others. In the case of the dial gauge of 0.001 m m scale intervals, every fifth scales are indicated with the longer lines than others and every 10 th scales or every fifth scales are given the numerals corresponding to the scale lines. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:45:45 MDTNo reproduction or networking permitted without license from IHS -,-,- STD-JIS B 7503-ENGL L997 W 4733hC18 O5503b9 519 4 B 7503 : 1997 5.3.3 shall be as shown in Fig. 5. Dimension of scales and long pointer The dimension of scales and long pointer Unit : mm c I In the case of 0.01 mm and 0.002 mm :W = 1 or more In the case of 0.001 mm :W = 0.7 or more L2W Remarks : The thickness of the scale lines is desirable to be equal to the width of the tip of long pointer. Fig. 5 Dimension of scales and long pointer Function The function of dial gauges shall be as follows : When the plunger is pressed in, the long pointer shall move in a clockwise direction. The long pointer shall be tightly fixed so as not to slip ever if the plunger receives rapid acceleration or slowing-down. When the plunger is in the lowest place and the zero point of the dial is placed on the position of 12 oclock, the long pointer shall have a travase at least 1/10 of a revolution in anticlockwise direction. The movement exceeding the specified measuring range shall be 1/5 of a revolution or more. In order to minimize parallax, the tip of the long pointer shall be close to the dial as far as possible and the clearance between them shall be uniform during a revolution of the long pointer. The contact point shall be interchangeable, have a wear-resistant end of spherical form and be surface-treated with regard to the application envisaged. The rotation of the outer frame shall be smooth and the dial shall be able to be fixed at an arbitrary position. To this end, a clamp may be provided. If not equipped with clamp, sufficient frictional resistance to the rotation is required. The stem shall have sufficient strength not affecting the move of the plunger by fixing it. Besides, the ear metal shall be so designed not affect the performance of the plunger even when it is fixed. The short pointer shall be of the construction to indicate the number of revolutions of the long pointer or the effective stroke of the plunger. When specified particularly, short pointer may be omitted. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:45:45 MDTNo reproduction or networking permitted without license from IHS -,-,- i l I 4 0.01 mrn 0.002 mrn 10 rnm 2 rnm Over 2 mm and max. max. less than 10 mm Measuring range STD-JIS B 7503-ENGL 0.001 mm 1 mm Over 1 mm and Over 2 mm and max. less than 2 mm less than 5 mm 5 B 7503 : 1997 Repeatability Indication 1/10 revolution ( I ) error 1/2 revolution 7 Performance 5 0.5 1 0.5 0.5 1 8 4 5 2.5 4 5 I 9 t 5 1 6 $I3 k5 t 6 7.1 shown in Table 1. Maximum allowable error The maximum allowable error of dial gauges shall be as The allowable error shall be evaluated estimating the inaccuracy of calibration inward (see IS0 14253-1). one revolution two revolutions Table 1 Maximum allowable error of indication Unit : pm I10 rt6 I 7 I 4 f 6 1 7 k15 ?6 I 8 f 4 +6 f 8 whole measuring range 4 1 s Retrace error 15131 4 131 3 141 5 7 k 12 25 +7 +. 10 I I I I I l I I r , ( , t I Note ( I ) Adjacent error Remarks : The value in this table shall be at 20 “C. 7.2 Measuring force The measuring force of dial gauges shall be as follows : a) The minimum measuring force shall be 0.4 N. b) When placing the plunger vertically and downward, the maximum measuring force shall not exceed 1.5 N at 0.01 mm scale interval and 2 N at 0.002 mm and 0.001 mm scale intervals. c) The difference between the maximum value and the minimum value of the measuring force in respect to the same moving direction of the plunger shall not exceed 0.7 N. d) At an arbitrary point in the measuring range, the difference between the measuring forces when the plunger is pressed in and goes out shall not exceed 0.6 N at 0.01 mm scale interval and 0.9 N at 0.002 mm scale interval and 0.001 mm scale interval. 8 dial gauges shall be as shown in Table 2. Methods of measuring of performance Methods for measuring the performance of Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:45:45 MDTNo reproduction or networking permitted without license from IHS -,-,- 6 B 7503 : 1997 Table 2 Methods of measuring of performance Item Indication error Adjacent error Retrace erroi Repeatability Measuring force Measuring method Holding the plunger of the dial gauge vertically and downward, carry out the following proce- dure setting the reading of dial gauge at the zero point. Press in the plunger 1/10 by 1/10 revolution up to two revolutions from the zero point, 1/2 by 1/2 revolution up to five revolutions and 1 by 1 revolution up to the end point of the measuring range after exceeding five revolutions and, returning back the plunger in the same state, read the same measuring points as in the press- ing in direction. Obtain the error from the error diagram made as a result of the reading in both di- rections (see Attached Fig. 1). Applying the contact point verti- cally on the upper surface of the measuring stand, obtain the max- imum difference betvjeen the in- dications at every times when the plunger is operated rapidly and slowly five times at an arbitrary position in the measuring range. Hold the dial gauge whose plunger is placed vertically and downward, transfer the plunger up-and-downward continuously and slowly to measure the mea- suring forces at the zero point, center and end point of the mea- suring range. Illustration Dial gauge I t Dial gauge - 7 W Upper dish spring type Measuring instrument Micrometer head or length measuring instrument of 0.5 vm or under in scale interval and instrumental er- ror of * 1 wrn and sup- porting stand for the dial gauge of 0.001 mm and 0.002 mm in scale interval and 2 mm or under in mea- suring range. For other dial gauges from the above, micrometer head or length measuring instru- ments of 1 um or under in scale interval and k 1 Dm ir instrumental error and mea- suring stand. Measuring stand Supporting stand Supporting stand Upper dish spring type indi- cating balance (2 g or under in scale interval) or force meter (0.02 N or under in sensitivity) i Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:45:45 MDTNo reproduction or networking permitted without license from IHS -,-,- l. i 7 B 7503 : 1997 9 Inspection The inspection of dial gauges shall be carried out on performance, shape and dimension, and function and the results shall conform to the specifications in 5 to 7. 10 Designation of products title of standard, scale interval and measuring range. Designation of dial gauges shall be number of standard or Example: JIS B 7503 0.01- 10 Dial gauge 0.01 - 10 11 Marking The following information shall be given on dial gauges. a) scale interval; b) manufacture number ; c) manufacturers name (or responsible supplier) or its abbreviation. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:45:45 MDTNo reproduction or networking permitted without license from IHS -,-,- 8 B 7503 : 1997 / c E O a a O c . VI ! 4 e, C O a Do .- - .- 3 i . I Y 9 z E CI Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:45:45 MDTNo reproduction or networking permitted without license from IHS -,-,- STD-JIS B 7503-ENGL 1997 H 9733bOA 0550374 98b W 9 B 7503 : 1997 i h v II I O z c -a .- .- L u U C e! 2 P) o .- i - $ c 2 -a u o 5 R 5. d vi .- 3 o Q I O O h CI v O Copyright Japanese Standards Association Provided by IHS under license with JSALic