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1、INTERNATIONAL STANDARD IS0 8486- 1 First edition 1996-08-I 5 Bonded abrasives - Determination and designation of grain size distribution - Part 1: Macrogrits F4 to F220 Abrasifs agglom b) the designation of the grit including the letter “F” for a bonded abrasive followed by a characteristic The post
2、 delivery testing of the grit FIO should include the variations shown in table 3. In the case of test sieve 2 it means that the 20 % value increases to number representing the grit size. EXAMPLE 24 % according to table 3 (plus 4 %I. Silicon carbide - F80 -7 6 Designation Typeof abrasive m Designatio
3、n of the grit The designation of macrogrits for fused aluminium oxide or silicon carbide complying with the require- Table 2 - Size distribution of macrogrits F4 to F220 Test sieves 1 2 3 3and4 3.4and5 Re- mainde Grit Aperture size Resi- Aperture size Resi- Aperture size Resi- Aperture size Sum of A
4、perture size Sum of inthe desig- sieve 1 due sieve 2 due sieve 3 due sieve 4 the sieve 5 the botton nation residues residues Pan Wl QI Y? Q2 w3 Q3 w4 QR + Q4 w5 Qz+Q4 AQ + Qs max. min. min. min. max. mm pm % mm pm % mm pm % mm pm % mm Km % % F4 8 5.6 475 4 3.35 F5 6,7 4 - 0 475 20 40 3.35 - - - 70 2
5、.8 - lb 3 F6 5.6 4 3.35 2.8 2.36 F7 4.75 3.35 2.8 2.36 2 F8 4 2.8 2.36 2 l-7 FlO 3.35 2,36 2 0 . 20 - 45 1,7 - 70 1.4 - 11 3 F12 2,8 2 1,7 1.4 1.18 F14 2.36 1.7 1,4 1.18 1 F16 2 1.4 1,18 1 - 850 F20 1.7 1.18 - 20 1 850 70 710 0 45 - 1) 3 F22 1,4 1 850 710 600 F24 1,18 - 850 25 710 600 65 500 F30 1 7
6、10 603 500 425 25 45 F36 850 600 500 425 355 0 - 65 - 1) 3 F40 - 710 500 30 425 355 300 40 F46 600 425 355 300 250 F54 500 355 300 250 212 30 F60 425 300 250 212 180 - 0 - _ - 40 - 65 1 11 3 F70 355 250 212 180 150 25 F80 300 212 180 150 125 F90 250 180 150 125 106 FlOO 212 150 20 125 106 75 0 - 40
7、- 65 1) 3 F120 180 125 106 90 63 F150 150 106 15 75 63 45 F180 125 90 75 63 53 65 0 - .15 - 11 - I 40 1) F220 106 75 63 53 45 60 1) Not specified. 3 -,-,- IS0 8486-1:1996(E) 0 IS0 Table 3 - Permissible deviation as a result of variations in the measuring technique Test sieve No. Grit designation 1 2
8、 3 3 and 4 3.4and5 Remainder of grit in the Permissible deviation bottom pan % % F4 F5 0 +4 -4 -4 - - F6 F7 F8 FlO 0 +4 -4 -4 - - F12 F14 F16 F20 0 +4 -4 -4 - - F22 F24 F30 F36 0 +4 -4 -4 - - F40 F46 F54 0 +4 -4 -4 - - F60 F70 0 +3 -3 -3 - - F80 F90 FIOO 0 +3 -3 -3 - - F120 F150 F180 0 +3 -3 -3 -3 -
9、 F220 NOTE - Percentages are of original sample mass. 4 Q IS0 IS0 8486-1:1996(E) Annex A (informative) Bibliography 11 I IS0 565:1990, Test sieves - Metal wire cloth, perforated metal plate and electroformed sheet - Nominal sizes of openings. 21 IS0 8486-2:1996, Bonded abrasives - Determination and designation of grain size distribution - Part 2: Microgrits F230 to FIZOO. IS0 8486-1:1996(E) IS0 ICS 25.100.70 Descriptors: tools, abrasives, tests, determination, grain size, grain size analysis, destgnatlon Price based on 5 pages -,-,-