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1、J I S R*b2Lb 86 W 4933608 0069920 4 w J IS * I UDC 666.792: 621.922.025: 621.882.3 JAPANESE INDUSTRIAL STANDARD Inserted Nut Abrasive Inserted Nut Ring Discs and Wheels JE R 62 I 6-1986 Translated and Published by Japanese Standards Association Printed in Japan 7s I Copyright Japanese Standards Asso
2、ciation 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 -,-,- JIS R*b2lb Bb W 4933608 00b992L b Translation without guarantee standard in Japanese is to
3、be evidence i n the event of any doubt arising, the original 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、,- I JIS R*62Lb 86 = 4933608 0069922 8 m UDC 666.792: 621.922.025: 621.882.3 JAPANESE INDUSTRIAL STANDARD J I S Inserted Nut Abrasive Discs and Inserted Nut Ring Wheels R 6216-1986 1. Scope This Japanese Industrial Standard specifies the inserted nut abrasive discs and inserted nut ring wheels, here
5、inafter, referred to as the “grinding wheels“ , which have used the alumina and silicon carbide grits of JIS R 6111 and alumina zirconia abrasive grains. 2. Types ing to the materials and grain sizes of abrasive grains used, grades and struc- tures of the grinding wheels , and materials of bond. The
6、 types of the grinding wheels shall be as given in Tables 1 to 5, accord- Table 1 a Types according to materials of abrasive grains A, WA, PA, HA, Z C , GC (Silicon carbide system) (Alumina system) Remark: Any mixture of 2 types of abrasive grains may be used, in this case, the symbols of the abrasi
7、ve grains used are designated together. This is called as a mixed abrasive grains. Examples of mixed abrasive grains: A/WA, C/GC , A/C , A/Z Table 2 Types according to grain sizes of abrasive grains (Number) 8, 10, 12, 14, 16, 20, 24, 30, 36, 46, 54, 60, 70, 80, 90, 100, 120, 150, 180, 220, 240, 280
8、, 320, 360, 400, 500, 600, 700, 800, 1000, 1200, 1500, 2000, 2500, 3000, 4000, 6000, 8000 Remarks 1. No. 8 is the coarsest, and No. 8000 is the finest. 2. .In the case where two types or more of grain sizes are used in mixture, it is designated by the grain size of main abrasive grains , and is call
9、ed as the mixed grain size. Table 3 Types according to grade Remark: A is the softest, and Z is the hardest. Applicable Standards: see page 9. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/200
10、7 02:39:47 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S R*b2Lb Ab 4933608 00b9923 T M 2 R 6216- 1986 Table 4 Types according to structure O , 1, 2 , 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 (Resinoid) l S , 2s, 3s, 4 s , 5 s (Magnesia) Remark: O or 1s is the most co
11、mpact , and 14 or 5 s is the coarsest, Table 5 Types according to material of bond B (Resinoid) M g (Magnesia) 3. Qualities 3.1 Appearance The grinding wheels shall be free from such harmful de- fects in use as cracks, fissures, chippings and flaws. in accordance with the GOSHI type testing method s
12、pecified in 3.2.1 of JIS R 6240, of which depths of indentation of bit shall conform to Table 6, in the case where the resinoid bond has been used. 3.2 Grades The grades of the grinding wheels, when subjected to the test Furthermore, as agreed between the parties concerned, the test may be made in a
13、ccordance with the Rockwell type testing method specified in 3.2.2 of JIS R 6240 or the sonic type testing method specified in 3.2.3 of JIS R 6240. a t a Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale
14、, 03/13/2007 02:39:47 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S R*62Lb 86 W 4933608 O069924 1 = L 0.94to0.680.79to0.580.68t00.510.58to0.440.51t0.380.46to0.340.41to0.310.36t00.270.33t00.25 M N O P Q R - O. 48to0.350.41toO. 31 O. 35to0.260.31toO. 23 - - - - O. 42t
15、o0.31 O. 36t00.27 O. 31t00.23 - - - - - - 3 R 6216- 1986 - - - - - - - Table 6 Unit: mm Remark: The grades of the grinding wheels having grade symbol and grain size of which numerical values are not given in this Table shall be as agreed between the parties concerned. 3.3 Structures The structures o
16、f the grinding wheels, when subjected to the test in accordance with the grain percentage test specified in 3.3 of JIS R 6240, shall conform to Table 7 in the case of the resinoid grinding wheels and to Table 8 in the case of the magnesia grinding wheels. Furthermore, the grain percentage test of th
17、e magnesia grinding wheels shall be in accordance with that of the vitrified grinding wheels, as appropriate. 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
18、networking permitted without license from IHS -,-,- J I S R*bZlb Bb m 4933b08 00b9925 3 4 R 6216-1986 Table 7 * 58 5 52 6 50 7 48 8 46 9 44 10 42 Permissible deviations B Table 8 Structure I Grain percentage 1s 50 to 60 2s 40 to 49 3s 30 to 39 4s 20 to 29 5s 10 to 19 - i 1.5 3.4 Degree of Safety 3.4
19、.1 Maximum Operating Peripheral Speeds The maximum operating 3.4.2 Degree of Safety peripheral speeds of the grinding wheels shall be in accordance with JIS R 6241. The degree of safety of the grinding wheels of 100 mm or over in outside diameter, when subjected to the test i n accordance with the r
20、otation test specified in 3.5.1 of JIS R 6240, shall conform to the require- ments of the classification 2 of Table 9. However, for those which have been specified in Table 1 of the ordinary speed specified in 2.1 of JIS R 6241, and those which have conformed to the requirements of the classificatio
21、n 3 of Table 9, when subjected to the test in accordance with the destructive rotation test specified in 3.5.2 of JIS R 6240, the rotation test on each lot of the classification 2 may be omitted. Furthermore, for those which are not conforming to therequirements of the classification 2 or classifica
22、tion 3, the requirements of the classification 1 may be applied. 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
23、 -,-,- J I S R*b2Lb 86 m 4933608 O069926 5 m Classi- fication 5 R 6216-1986 Type of inspection Table 9 1 2 100 % inspection (Rotation test on Total number each lot) Sampling inspec- tion (Rotation lot, however, at test on lot) Control inspection (Periodic destruc- tive rotation test) 10 % or over of
24、 least 5 pieces 3 pieces once or over per month on the same subdivid. Sample size Test magnificat ion 1.5 1.5 Machine grind- ings(2) 1.8 Others 2. o Acceptance criteria for lot Percentage defective 5% or under ( ) Percentage defective O Percentage defective O I ed symbol of bond Notes (l) In the cas
25、e where the percentage defective has exceeded 5 %, in the result of the 100 % inspection, the total number shall be con- sidered to be defective. a ( 2 , The machine grindings mean the grinding operations in which the depths of cut and feeds are operated mechanically, such as the cylindrical grindin
26、g and surface grinding. In addition, the wheels on which the rotation test specified in 3.5.1 of JIS R 6240 is not possible due to shapes shall satisfy either one of Table 10. Table 10 Item De signing conditions on safety a guarantee Rotation test using model wheel Contents The holding force of moun
27、ting nut shall be the multiplied value or over of a centrifugal force generated on the wheel by safety factor. or over of the centrifugal force generating on the wheel by safety factor. However, the safety factor shall be (1.8) or over for the machine grindings(2) of the peripheral speed of Table 1
28、of JIS R 6241 or more, and for others be (2. O) or over. The strength of the wheel shall be the multiplied value In the case of the disc type, a model wheel which has been manufactured in the same manufacturing condition, only of which. bore diameter is larger, shall pass the rotation test specified
29、 in 3.5.1 of JIS R 6240. 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 -,-,- J I S R*b2Lb Bb 4933608 00b9927 7
30、 m 6 R 6216- 1986 4. Shapes, Dimensions and Dimensional Permissible Deviations 4.1 The shapes and dimensions of the grinding wheels shall be in accordance with Fig. 21, Fig. 22 and Attached Fig. 5 (5) and Attached Table 5 (5), Attached Figs. 5 (6) (a) to (i) and Attached Tables 5 (6) (a) to (i), Att
31、ached Figs. 5 (7) and Attached Table 5 (7) (a) and (b), Attached Figs. 5 (8) (alto (o) and Attached Tables 5 (8) (a) to (o) specified in JIS R 6211. 4.2 The dimensional permissible deviations of the grinding wheels shall be as given in Table 1 1 for the inserted nut disc type grinding wheels and Tab
32、le 12 for the inserted nut ring type grinding wheels and the measuring methods shall be in accordance with the shapes and dimensions specified in 3.1 of JIS R 6240. Table 1 1 Unit: mm Out side Dimensional Difference of outside Permissible Thick- diameter permissible diameters :R=IDi-21 deviations ne
33、ss (Dl deviations for 2-piece set on R (TI R 51.0 I I Under 510 + 1.0 5 10 - Total R S2.0 510 to + 1.0 510 to 915 incl. - 3.0 915 incl. Dimensional permissible deviations k 2.0 Unit: mm Bore Dimensional diameter permissible (HI deviations t 1.0 Under 50 I 50 and over 2 2.0 - Table 12 Unit: mm Outsid
34、e Dimensional Thickness Dimensional Rim Dimensional permissible width permissible deviations (W) deviations diameter permissible (Dl deviations (TI Under + 1.5 22.0 /Under 50 I “O I/ 50 I - 0.5 Under 5 10 I II I II I + 2.0 11 I - 0.5 510 and I 2 3.0 150 and over k2.0 over 4.3 For the mounting accura
35、cy of the grinding wheels, when subjected to the test in accordance with the mounting accuracy specified in 3.1.5 of JIS R 6240, there shall be no abnormality. a e a a Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie
36、Not for Resale, 03/13/2007 02:39:47 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S R*62lb 86 W 4933608 0069928 9 WA PA 7 R 6216- 1986 White alumina (WA) Pink alumina (PA) 5. Materials 5.1 Artificial Abrasives The artificial abrasives to be used for the grinding wheel
37、s shall be as specified in JIS R 6111 and alumina zirconia abrasive grains, and the types shall be as given in Table 13. In addition, the grain sizes of the artificial abrasives shall be those specified in JIS R 6001, and the super fine grain sizes of No. 4000, No. 6000 and No. 8000. Table 13 HA Z T
38、ype of artificial abrasive I (Symbol) Type of grinding wheels according to materials of abrasive grains Disintegrated alumina (HA) Alumina zirconia ( AZ ) A I Brown alumina (A) C GC Black silicon carbide (C) Green silicon carbide (GC) 5.2 Bonds The resinoid bond to be used for the grinding wheels sh
39、all be the synthetic resin of sufficiently excellent quality, other than synthetic rubber and natural rubber. specified in JIS A 6905. mounting part shall be wire gauze and others which are sufficiently effective. of nut. The magnesia bond used shall be the magnesia cement 5. 3 Reinforcing Materials
40、 The reinforcing material to be used for the In addition, any reinforcing attachment may be used on the inserting part 6. Marking The grinding wheels shall -be marked with the following information on re- spective products. Furthermore , (3) to (7) shall be stated in this order. (1) Shape (2) Dimens
41、ions : (Disc type Outside diameter D x thickness T x bore diameter H) (Ring type Outside diameter D x thickness T x rim thickness W ) (3) Material of abrasive grains (4) Grain size Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=
42、Wing, Bernie Not for Resale, 03/13/2007 02:39:47 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S R*b2Lb 8b W 4933bO OOb29 O - 8 R 6216- 1986 (5) Grade (6) Structure (7) Bond and subdivided symbol (8) Maximum operating peripheral speed (9) Manufacturers name or its abb
43、reviation (10) Manufacturing number (11) Year and month of manufacture Example of marking Shape: inserted nut disc type Dimensions : out side diameter 585 mm thickness 65 mm bore diameter 19 mm Material of abrasive grains: WA Grain size: 80 Grade : J Structure: 8 Bond: BOO Maximum operating peripher
44、al speed: 2100 m /min Manufacturers name : OOOK K Manufacturing number: No. 000 Year and month of manufacture: SHWA O0 year oo month The grinding wheel of which contents are as given above shall be marked as follows: Disc, 585 x 65 x 19, WA 80 J 8 BOO 2100, 000KK1. NO. OOO(SH0WA 0000) e * e Copyrigh
45、t 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 -,-,- a a a a J I S R*62Lb 86 E 4933608 0069930 7 E 9. R 6216-1986 Appli
46、cable Standards : JIS A 6905-Magnesium Oxychloride Cement (Magnesia Cement) JIS R 6001-Abrasive Grain Size JIS R 6111-Artificial Abrasives JIS R 6211- Shapes and Dimensions of Grinding Wheels JIS R 6240-Testing Methods of Grinding Wheels JIS R 6241-Maximum Operating Speed of Grinding Wheels h Copyri
47、ght 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 -,-,- a e 4 a J I S R*b21b b Li933bO OOb9931 9 R 6216-1986 Edition 1 J
48、apanese Text Established by Minister of International Trade and Industry Date of Establishment: 1972-10-01 Date of Revision: 1986- 03- O1 Date of Public Notice in Official Gazette: 1986-03-11 Investigated by: Japanese Industrial Standards Committee Divisional Council on Ceramics Technical Committee on Grindong Wheels This English translation is published by: Japanese Standards