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All KLINGSPOR coated abrasive products, with the exception of Alumina Zirconia and Ceramic Aluminum Oxide, are graded by grit size using the FEPA or P-grade scale. Some competitive products are graded according to the CAMI (Coated Abrasives Manufacturers Institute) scale. P-graded products are easily identified by a "P" preceding the grit number on the back of the material. The chart on this page compares both scales, along with relative size in inches and microns.
FEPA
Federal of Euopean Producers of Abrasives; The European scale for grading abrasives; Also known as P grade due to the grade of grits are preceded by a "P".
CAMI
Coated Abrasive Manufacturers Institute; The United States scale for grading abrasives.
Finishing Scale
This grit grading system places an "A" before the number.
Micron Scale
A system that measures abrasive particles by micron (micrometer). Micron is 0.0025 of an inch or 1 millionth of a meter.
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CAMI |
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P2000 |
1000 |
0.00042 |
9.5 |
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P1500 |
800 |
0.00051 |
12.3 |
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P1200 |
A16 |
0.00060 |
15.3 |
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600 |
0.00062 |
16.0 |
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P1000 |
0.00071 |
18.3 |
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500 |
0.00077 |
19.7 |
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0.00079 |
20.0 |
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P800 |
A25 |
0.00085 |
21.8 |
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400 |
A30 |
0.00092 |
23.6 |
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0.00098 |
25.0 |
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P600 |
A35 |
0.00100 |
25.75 |
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360 |
0.00112 |
28.8 |
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0.00118 |
30.0 |
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P500 |
0.00118 |
30.2 |
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P400 |
A45 |
0.00137 |
35.0 |
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320 |
0.00140 |
36.0 |
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0.00118 |
40.0 |
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P360 |
0.00158 |
40.5 |
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0.00118 |
44.0 |
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0.00118 |
45.0 |
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P320 |
A60 |
0.00180 |
46.2 |
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0.00197 |
50.0 |
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P280 |
0.00204 |
52.5 |
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240 |
A65 |
0.00209 |
53.5 |
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0.00217 |
55.0 |
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P240 |
A75 |
0.00228 |
58.5 |
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0.00230 |
60.0 |
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P220 |
A90 |
0.00254 |
65.0 |
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220 |
A85 |
0.00257 |
66.0 |
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P180 |
180 |
A110 |
0.00304 |
78.0 |
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150 |
A130 |
0.00363 |
93.0 |
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P150 |
0.00378 |
97.0 |
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120 |
0.00452 |
116.0 |
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P120 |
A160 |
0.00495 |
127.0 |
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100 |
0.00550 |
141.0 |
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P100 |
1200 |
0.00608 |
156.0 |
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80 |
0.00749 |
192.0 |
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P80 |
0.00768 |
197.0 |
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P60 |
0.01014 |
260.0 |
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60 |
0.01045 |
268.0 |
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P50 |
0.01271 |
326.0 |
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50 |
0.01369 |
351.0 |
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P40 |
0.01601 |
412.0 |
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40 |
0.01669 |
428.0 |
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P36 |
0.02044 |
524.0 |
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36 |
0.02087 |
535.0 |
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P30 |
0.02426 |
622.0 |
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30 |
0.02488 |
638.0 |
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24 |
0.02789 |
715.0 |
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P24 |
0.02886 |
740.0 |