JIS-R-6219-2003-ENG.pdf
J IS JAPANESE I NDUSTRIAL STANDARD Translated and Published by Japanese Standards Association Magnesia grind i n g wheels ICs 25.100.70 Reference number : JIS R 6219 : 2003 (E) PROTECTED BY COPYRIGHT 7s Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 02:39:47 MDTNo reproduction or networking permitted without license from IHS -,-,- R 6219 : 2003 Foreword This translation has been made based on the original Japanese Industrial Standard revised by the Minister of Economy, Trade and Industry through deliberations at the Japanese Industrial Standards Committee, as the result of proposal for revision of Japanese Industrial Standard submitted by Japan Grinding Wheel Association (GISYJapanese Standards Association (JSA) with the draft being attached, based on the provision of Article 12 Clause 1 of the Industrial Standardization Law applicable to the case of revision by the provision of Article 14. Consequently JIS R 6219 : 1999 is replaced with this Standard. In this revision, “shapes and dimensions of grinding wheel“ specified in Attached Figure is transferred to JIS R 6211-1 Bonded abrasive products- Dimensions-Part 1 : Grinding wheels for external cylindrical grinding between centres, JIS R 621 1-4 Bonded abrasive products-Dimensions- Part 4 : Grinding wheels for surface grindinglperipheral grinding and JIS R 621 1-5 Bonded abrasive products-Dimensions-Part 5 : Grinding wheels for surface grindinglface grinding and eliminated from this Standard. Attention is drawn to the possibility that some parts of this Standard may conflict with a patent right, application for a patent after opening to the public, utility model right or application for registration of utility model after opening to the public which have technical properties. The relevant Minister and the Japanese Industrial Standards Committee are not responsible for identifying the patent right, application for a patent after opening to the public, utility model right or application for registration of utility model after opening to the public which have the said technical properties. Date of Establishment: 1978-12-01 Date of Revision: 2003-03-20 Date of Public Notice in Official Gazette: 2003-03-20 Investigated by: Japanese Industrial Standards Committee Standards Board Technical Committee on Ceramics JIS R 6219 : 2003, First English edition published in 2004-02 Translated and published by: Japanese Standards Association 4-1-24, Akasaka, Minato-ku, Tokyo, 107-8440 JAPAN In the event of any doubts arising as to the contents, the original JIS is to be the final authority. O JSA 2004 Ail 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 PROTECTED BY COPMZIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 02:39:47 MDTNo reproduction or networking permitted without license from IHS -,-,- R 6219 : 2003 1 2 3 4 4.1 4.2 4.3 4.4 5 6 6.1 6.2 7 Contents Page Scope Normative references Classification Quality . Appearance . Structure . Balancing Safety . Shapes, dimensions and tolerance . Material . Artificial abrasives Bonding materials . Marking . 1 1 1 3 3 3 3 3 4 5 5 6 6 (i PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 02:39:47 MDTNo reproduction or networking permitted without license from IHS -,-,- JAPANESE INDUSTRIAL STANDARD JIS R 6219 : 2003 Magnesia grinding wheels 1 Scope This Japanese Industrial Standard specifies the magnesia grinding wheels which use alumina abrasive grains or silicon carbide abrasive grains specified in JIS R 6111. 2 Normative references The following Standards contain provisions which, through reference in this Standard, constitute provisions of this Standard. The most recent editions of the standards (including amendments) shall be applied. JIS R 6001 Bonded abrasive grain sizes JIS R 6111 Artificial abrasives JIS R 6211-1 Bonded abrasive products-Dimerisions-Part 1 : Grinding wheels for external cylindrical grinding between centres JIS R 6211-4 Bonded abrasive products-Dimensions-Part 4 : Grinding wheels for surface grindinglperipheral grinding JIS R 621 1-5 Bonded abrasive products-Dimensions-Part 5 : Grinding wheels for surface grinding1 face grinding JIS R 6240 Testing methods of grinding wheels JIS R 6241 Maximum operating speed of grinding wheels JIS R 6242 Bonded abrasive products-General-Designation, marking, range of outside diameters and tolerances Bonded abrasive products-Static balancing of grinding wheels- Tes ti ng JIS R 6243 3 Classification Grinding wheels shall be classified as shown in Tables 1 to 6, through the material and grain size of applied abrasive grains, and the grade and structure of grinding wheels. Table 1 Classification by the material of abrasive grains Classification by the material of abrasive grains A, WA, PA, HA, Z C, GC (alumina abrasive grains) (silicon carbide abrasive grains) Remarks : Mixture of two kinds of abrasive grains can be applied, and in this case the com- bined classification symbol of abrasive grains is used. This type is called mixed abrasive grains. Example of mixed abrasive grains: A/WA, C/GC, A/C, NZ PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 02:39:47 MDTNo reproduction or networking permitted without license from IHS -,-,- 2 R 6219 : 2003 Classification Macrogrits Classification by the grain size of abrasives F4, F5, F6, F7, F8, F10, F12, F14, F16, F20, F22, F24, F30, F36, F40, F46, F54, F60, F70, F80, F90, F100, F120, F150, F180, F220 Table 3 Classification by the grain size of abrasives (fine powder for general purpose grinding) Classification Fine powder Classification by the grain size of abrasives F230, F240, F280, F320, F360, F400, F500, F600, F800, F1000, F1200 3 The fine powder for general purpose grinding specified in JIS R 6001 shall be used. Fine powder Table 4 Classification by the grain size of abrasives (fine powder for precision grinding) 240,280,320, 360,400, 500,600, 700,800,1000, 1200, 1500,2000,2500, 3000,4000,6000, 8000 I I Classification 1 Classification by the grain size of abrasives (gauge) Remarks 1 Gauge 240 is the coarsest and gauge 8000 is the finest. 2 When mixture of two or more kinds of abrasive grains is applied, the main grain size shall be used for expression. This type is called mixed grain size. 3 The fine powder for precision grinding specified in JIS R 6001 shall be used. PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 02:39:47 MDTNo reproduction or networking permitted without license from IHS -,-,- 3 R 6219 : 2003 1s 2 s Table 5 Classification by the grade Classification by the grade 50 to 60 40 to 49 Remarks : A is the softest and Z is the hardest. Further, the measuring method and the speci- fication value of the grade shall be as agreed be- tween the purchaser and the manufacturer. 4s 5 s Table 6 Classification by the structure 20 to 29 10 to 19 Classification by the structure lS, 25, 3s, 45, 5 s 1s is the densest and 5s is the sparsest. Remarks : 4 Quality 4.1 mental to use such as cracks, crazings, chips, flaws, etc. Appearance Appearance of grinding wheel shall be free from defects detri- 4.2 Structure of grinding wheel shall be tested with the grain volume percentage test specified in 3.3 of JIS R 6240, and the result shall satisfy Table 7. Further, the grain volume percentage test shall be in the same way as vitrified grinding wheel. Structure Table 7 Structure I Structure I Grainvolume percentage % 1 I 3 s I 30 to 39 I 4.3 Bal ncing Balancing of grinding wheel shall be tested with th balancing test method specified in clause 5 of JIS R 6243, and the weight shall be equal or lighter than the maximum tolerance value of balancing specified in clause 4 of JIS R 6243. This specification is only applied to the grinding wheel of 150 mm or more of out- side diameter or 0.2 kg or more of mass. 4.4 Safety PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 02:39:47 MDTNo reproduction or networking permitted without license from IHS -,-,- 4 R 6219 : 2003 Grade 4.4.1 Maximum operating peripheral speed Maximum operating peripheral speed shall be in accordance with JIS R 6241. Type of inspection Sample size Multiple of testing 4.4.2 Safety Safety of grinding wheel of outside diameter 100 mm or over shall be tested with the rotating test specified in 3.5.1 of JIS R 6240, and the result shall satisfy Grade 2 of Table 8. However, for the grinding wheel specified as regular speed in Table 1 in 3.1 of JIS R 6241 which satisfies the specification of Grade 3 in Table 8 at the test of the break down rotary test specified in 3.5.2 of JIS R 6240 can omit the rotary test for each lot in Grade 2. Further, those which do not satisfy the specification of Grade 2 or Grade 3 may follow Grade 1. 1 2 Table 8 Classification of rotary test 100 % inspection (Rotary test for each lot) Sampling inspection (Rotary test for each lot) 100 % 1.5 3 10 % or over of lot, and 5 pieces min. Control inspection 3 pieces per one time Machine (Periodic break or more for every month grinding(2) 1.8 2.0 down rotary test) for subdivision classifi- Others cation of the same bond 1.5 Criteria for lot acceptance Fraction defective 5 % or under (l) Fraction defective O Fraction defective O 1 Notes (1) Fraction defective over 5 % as a result of 100 % inspection makes the whole products disqualified. (2) Means the grinding at which cut and feed are operated mechanically, such as cylindrical grinding, surface grinding, and so on. 5 Shapes, dimensions and tolerance a) Shapes and dimensions of grinding wheel shall be in accordance with clause 4 in JIS R 6242, 3.1 in JIS R 6211-1, 3.1 in JIS R 6211-4 and 3.1 in JIS R The tolerance on dimension of grinding wheel shall be in accordance with Table 9 and Table 10, and the measuring method shall be in accordance with 3.1 in JIS R 6240. 6211-5. b) PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 02:39:47 MDTNo reproduction or networking permitted without license from IHS -,-,- 5 R 6219 : 2003 H Less than 50.8 Table 9 Dimensional tolerance of Type 1: Straight grinding wheel Tolerance With Without bushing bushing + 0.4 + 0.3 +0.1 +0.1 Unit: mm Less than 255 i 1.0 255 or over to and excl. 510 f 2.0 25 or over to and excl. 50 50 or over to and excl. 100 Table 10 t 1.0 50.8 or over to +0.6 and excl. 101.6 +0.1 t2.0 101.6 or over to +2.0 + 1.0 and excl. 355.6 +0.5 + 0.1 Outside diameter 510 or over to and excl. 760 D I Toler- 13.0 -I- 760 min. ;: min. tr 4.0 6 Material Thickness Hole diameter Tolerance Less than 25 t 0.5 100 min. 1 t2.0 I/ 355.6 min. +3.0 1 +0.5 I Dimensional tolerance of Type 2: Cemented or clamped cylinder wheel Thickness I T I Toler- Less it2.0 than I 100 min. loo I i3.0 Outside tightening diameter diameter of Unit: mm tightening Whole 6.1 Artificial abrasives Artificial abrasives used for the grinding wheel shall be in accordance with JIS R 6111, and the classification shall be as Table 11. The grain size of artificial abrasives shall be as specified in JIS R 6001. PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 02:39:47 MDTNo reproduction or networking permitted without license from IHS -,-,- 6 R 6219 : 2003 classification of artificial abrasives by the material of abrasive grain A Classification of artificial abrasives (symbol) Regular fused alumina (A) WA I White fused alumina (WA) I PA HA Ruby fused alumina (PA) Mono-crystalline fused alumina (HA) Z I Fused alumina zirconia (AZ) I I C I Black silicone carbide (C) I Green silicone carbide (GC) 6.2 of the magnesia cement of good quality. Bonding materials Bonding materials used for grinding wheel is composed 7 Marking The marking on products and packaging of grinding wheel shall be in accordance with clause 7 of JIS R 6242, and the marking items shall be as follows: Products The following information 1) to 3) shall be clearly marked on the products whose outside diameter 75 mm or over. 1) 2) Maximum operating speed 3) Package The following information 1) to 11) shall be marked on each pack- age. Bonding material and subdivision classification Name of manufacturer or its abbreviation Further, information 3) to 7) shall be marked in this order. 1) Shape and rim shape 2) 3) Material of abrasive grains 4) Grain size 5) Grade 6) Structure 7) 8) Maximum operating speed 9) 10) Production number 11) Year and month of manufacture Dimensions (outside diameter D x thickness T x hole diameter H ) Bonding material and subdivision classification Name of manufacturer or its abbreviation PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 02:39:47 MDTNo reproduction or networking permitted without license from IHS -,-,- 7 R 6219 : 2003 Example 1 Macrogrits Shape: No. 1 Rim shape: D Dimensions: outside diameter 205 mm, thickness 16 mm, hole diam- eter 19.05 mm Material of abrasive grains: A Grain size: F60 Grade: K Structure: 4s Bonding material: Mg O0 Maximum operating speed: 27 m/s Name of manufacturer: O00 Co., Ltd. Production number: No. O00 Year and month of manufacture: 2000/00 Grinding wheel above mentioned shall be marked as follows: Marking example on product: M g 0 0 , 27 m/s, O00 Co., Ltd. Marking example on package: No. 1, D, 205 x 16 x 19.05 A, 60, K, 4S, Mg00, 27 d s O00 Co., Ltd., No.000, (2000/00) Example 2 Fine powder for general purpose grinding Shape: No. 1 Dimensions: outside diameter 205 mm, thickness 16 mm, hole diam- eter 19.05 mm Material of
