JIS-B-7517-1993-R2003-ENG.pdf

J I S BS75l17 93 W 4933bOô 05LLlb57 506 JIS JAPANESE INDUSTRIAL STANDARD Vernier, dial and digital height gauges Translated and Published by Japanese Standards Association UDC 531.71 7.3 Printed in Japan 7s Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 07:22:34 MDTNo reproduction or networking permitted without license from IHS -,-,- JIS Bt7517 93 m 4933b08 0534658 442 m In the event of any doubt arising, the original Standard in Japanese is to be final authority. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 07:22:34 MDTNo reproduction or networking permitted without license from IHS -,-,- UDC 531.717.3 r A JAPANESE INDUSTRIAL STANDARD r/ Vernier, dial and digital height gauges J I S B 7517-1993 1. This Japanese Industrial Standard specifies the height gauges of 1000 mm or under in maximum measuring length, among the general height gauges for measuring height dimensions by 0.05 mm, 0.02 mm or 0.01 mm in scale interval) minimum indication amount or minimum reading value (hereafter referred to as “height gauges“). Scope Remarks: The standards cited in this Standard are the following: JIS B 7503 Dial gauges reading in 0.01 mm JIS B 7506 Gauge blocks JIS B 7513 Precision surface plates - JIS B 7526 Squares JIS B 7533 Dial test indicators (lever type) JIS B 7536 Electrical comparators JIS G 4051 Carbon steels for machine structural use JIS G 4303 Stainless steel bars JIS G 4401 Carbon tool steels JIS G 5502 Spheroidal graphite iron castings JIS H 5501 Cemented carbide alloy of tip JIS Z 8103 Glossary of terms used in instrumentation 2. Z 8103 apply, and the rest of the terms shall be as follows: Definitions For the main terms used in this Standard the definitions in JIS (i) height gauge The measuring instrument capable of reading the distance be- tween the measuring face of scriber and the reference face of base by the graduation of main scale or counter, and vernier scale or dial scale, or by an electronics type digital indication, when the slider with a jaw to which a scriber is attached slides along the pillar standing vertical to the base. subdivision, and it is obtained by dividing the (n - i) graduations of the main scale graduations into n or the travelling amount of the slider mechanically by gears or the like, That numerical indication to detect the travelling amount of the slider on the basis of the main scale and to express this by converting and counting mechanically (hereafter referred to as “counter“). In this case, the dial scale may also be used together for reading the decimal part of the length. a (2) vernier scale That scale for reading the main scale graduations in further equal parts. It is also called the auxiliary scale. (3) dial scale (4) mechanical type digital indication That disk scale for reading by the rotating pointer, magnifying Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 07:22:34 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S B*7537 93 m 4933608 0534660 OTO m 2 B 7517-1993 (5) electronics type digital indication The numerical indication being expressed by detecting the travelling amount of the slider on the basis of the main scale and counting this by an electronics circuit. (6) instrumental error That subtracted value of the true value to be indicated from the reading of the height gauge. 3. accordance with Fig. 1. Names The names of the principal parts of the height gauge shall be in Pillar Graduation of main Measuring face of scriber Reference end face / Fig. 1. Names of principal parts (a) That with main scale travelling device Main-scale ,travelling device Locking screw / d ?Reference surface of base Set-screw (b) That with sensitive feed Sensitive feed screw thread (c) That of pointer reading Main scale Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 07:22:34 MDTNo reproduction or networking permitted without license from IHS -,-,- a Measuring length 50 or under Fig. 1 Graduation, minimum indication amount or minimum reading value 0.05 0.02 or 0.01 f 0.05 f 0.02 (d) That of pointer reading with counter Over 200 to 300 or under Over 300 to 400 or under 3 B 7517-1993 f 0.08 & 0.09 (Continued) Over 600 to 700 or under Over 700 to 800 or under Over 800 to 900 or under . (e) That of electronics type digital indication f 0.12 & 0.13 f 0.14 f 0.06 + 0.07 -&ita1 indication Over 900 to 1000 or under I f 0.15 Remarks: These Figures shall be those indicating the names only, and shall not be those indicating the standards of shapes and construction. - 4. The types of the reading mechanisms of the height gauges shall con- sist of four types of readings by the main scale and the vernier scale, by the main scale, the dial scale and the pointer, by the counter, and by the electronics digital indication, and there are those having and not having sensitive feed respectively. Types 5. gauges shall be 150 mm, 200 mm, 300 mm, 450 mm, 600 mm and 1000 mm. Maximum measuring length The maximum measuring lengths of the height 6. Performance 6.1 tal errors of the height gauges shall be in accordance with Table 1. Instrumental errors of height gauges The permissible values for instrumen- Over 50 to 100 or under I & 0.06 I Over 100 to 200 or under I f 0.07 I f 0.03 f 0.04 Over 400 to 500 or under I f 0.10 I f 0.05 Over 500 to 600 or under I f 0.11 I Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 07:22:34 MDTNo reproduction or networking permitted without license from IHS -,-,- - - ._ J I S B*75L7 93 W 4733608 05L4bb2 973 W 4 B 7517-1993 6.2 surface of base of the height gauge shall be 0.005 mm. Flatness for reference surface of base The flatness tolerance for reference 6.3 of pillar respect to reference end face of pillar of the height gauge shall be in accordance with the following formula: Perpendicularity for reference surface of base in respect to reference end face The perpendicularity tolerances for the reference surface of base in (0.01 + &) mm where, L is the numerical value expressing the measuring length (unit: mm). 6.4 Parallelism for reference surface of base to measuring surface of scriber The parallelism tolerance for the reference surface of base to measuring surface of scriber of the height gauge shall be 0.01 mm. 7. Graduation 7.1 Graduating method accordance with the graduating method of vernier in Table 2, and with the graduat- ing method of dial in Table 3. The graduating method of the height gauge shall be in Table 2. Graduating method of vernier Unit: mm Minimum Explanatory reading value Figure I Graduating method of vernier I of main scale 1 Divide 39 mm into 20 equal parts 0.05 Fig. 2 Divide 49 mm into 50 equal parts 0.02 Fig. 3 Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 07:22:34 MDTNo reproduction or networking permitted without license from IHS -,-,- . J I S B*7517 93 m 4933608 0514663 BOT m Scale interval of main scale or min- imum indicating amount of counter 1 or 2 5 B 7517-1993 Travelling amount of slider Scale Explanatory Figure for one revolution of pointer 2 0.02 Fig. 4 Fig. 2. Divide 39 mm into 20 equal parts (Example of reading: 7.60 mm) Fig. 3. Divide 49 mm into 50 equal parts (Example of reading: 19.68 mm) 7 1 I 1 I 0.01 I Fig. 5 Fig. 4. Example of graduating method Fig. 5. Example of graduating method for 0.02 mm in scale interval for 0.01 mm in scale interval I I I 1 1 O Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 07:22:34 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S B*75i17 93 4933608 0514664 746 6 B 7517-1993 7.2 shall be in accordance with Table 4 for the vernier reading, and with Table 5 for the pointer reading. However, for those of the vernier readings, the difference be- tween the maximum value and the minimum value of the thickness of each gradua- tion line shall be 0.03 mm or under throughout the main scale graduations and vernier graduations. Graduation line The thicknesses of the graduation line of the height gauges Table 4. Thickness of graduation line for those of vernier reading Unit: mm Thickness of main scale graduation reading value I and vernier graduation line Minimum 0.05 I 0.02 I 0.08 to 0.20 Table 5. Thickness of graduation line for those of pointer reading Unit: mm Thickness of main scale graduation and dial maduation line Scale interval I I 0.02 I 0.10 to 0.30 8. electronics type digital indication of the height gauge shall be 4 mm or over. Letters for electronics type digital indication The height of letters for the 9. graduation surface For that of vernier reading, the level difference between the main scale graduation surface and the inclined tip-end of vernier graduation sur- face shall be 0.3 mm or under. For a plane graduation, main scale graduation sur- face and vernier graduation surface shall be in the same plane, and its level difference shall be 0.05 mm or under, as well as the clearance between the main scale graduation and the vernier graduation shall be 0.03 mm or under (See Fig. 6). Level difference between the main scale graduation surface and the vernier Fig. 6. Level difference between main scale graduation surface and vernier graduation surface Vernier Main scale Vernier graduation surface Slider Slider Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 07:22:34 MDTNo reproduction or networking permitted without license from IHS -,-,- 7 B 7517-1993 Measuring surface of scriber 10. gauge shall be in accordance with the following: Construction and functions The construction and functions of the height 0 Class D No. 1 to No. 3 specified in JIS H 5501 SK 2 to SK 6 specified in JIS G 4401 (6) (7) 11. The surface roughness of reference surface of base and the measuring surface of scriber shall be 0.4 a. When to fix the slider by the locking screw or the like, the movement of scriber tip-end shall be not impedimenta1 in practical use. The slider shall operate smoothly and without loosening over the whole range of operation, and be free from harmful play. For that of which main scale can be moved, the travelling of the main scale shall be smooth, as well as it shall be locked to the pillar securely by the lock- ing screw when it is used. The slider and sensitive feed shall be capable of being locked to the pillar securely by fixing devices (locking screw and the like). The indication value of counter shall be capable of being adjusted securely. That of electronics type digital indication, when the slider has been moved at a speed exceeding the permissible value, and when an erroneous indication is indicated due to the voltage drop, shall have the function to clearly indicate that the values are wrong. For that of electronics type digital indication, when it has the function to out- put the indication values as the measured data, the treatment system of its datum output shall be described in detail in the instruction manual or the like. Materials and hardnesses 11.1 The materials of the principal parts of the height gauge shall be those given in Table 6, or those equal to or superior to these in mechanical proper- ties. Materials Table 6. Materials Item I Material Base JIS G 4051 JIS G 5502 JIS G 4303 11.2 Hardnesses The hardness of the reference surface of base of height gauge shall be 500 HV or over, and the hardness of measuring surface of scriber shall be 700 HV or over. 12. performances of the height gauge shall be given in Table 7. Measuring method of performances An example of measuring methods of Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 07:22:34 MDTNo reproduction or networking permitted without license from IHS -,-,- - JIS B*75i17 73 m 4733b08 05L4bbb 517 m 8 B 7517-1993 - No. 1 2 3 Table 7 . Measuring methods of performances of height gauge (Example) Item Instrument- al error Flatness of reference surface of base Perpendic- ularity of reference surface of base to reference end face of pillar Parallelism of reference surface of base to measuring surface of scriber Measuring method Measure by putting the meas- uring surface of scriber of the height gauge on the gauge block or the equal to or superior to this being placed on the precision surface plate, and obtain by subtracting the dimension of gauge from the reading of the height gauge. Put the height gauge on two pieces of gauge blocks equal in nominal dimension being fixed on a precision surface plate or on the gauges equal to or superior to that, measure by applying the measuring point of lever type dial gauge or electrical micrometer being attached to the stand to the reference surface of base, and obtain the difference between the maximum value and the minimum value acquired. Attach two pieces of 0.01 mm graduation dial gauges to strong stand so as to contact the pillar of height gauge at upper and lower ends, and measure on the precision surface plate to compare with a square. Put the reference surface of base of height gauge on the precision surface plate in close contact, measure by applying the measuring point of lever type dial gauge or electrical micrometer attached to the stand to the measuring surface of scriber, and obtain the difference between the maximum value and the minimum value acquired. Diagram n Precision surface plate Ever type dial 1 / Precision surface plate Stand Precision surface plate Measuring tools Gauge block Grade 2 specified in JIS B 7606 or the gauge equal to or superior to this, precision surface plate Grade 1 and limit gauge specified in JIS B 7513. Gauge block Grade 2 specified in JIS B 7506 or the gauge equal to or superior to this, precision surface plate Grade 1 specified in JIS B 7513, and 0.002 mm graduation lever type dial gauge speci- fied in JIS B 7533 or electrical