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Designations for Superabrasives (Diamond, CBN) and Conventional Abrasives

Practically every wheel manufacturer has his own abbreviations for the grinding materials he uses (lack of standards). Letters for the abrasive have gradually become more or less uniformly accepted: A for corundums (including sintered corundum), ZA for zirconia alumina, C for silicon carbide, B for CBN (cubic boron nitride) and D for diamond. However, the numbers which usually precede these deviate significantly from one another. This often makes comparisons or evaluations difficult for the user.

These are the designations for individual types of grain and for the most frequently used combinations which are usually used at Meister Abrasives AG (subject to amendment at any time):

Abbreviation*

CB
D
61A
62A
63A
64A
66A
71A
72A
79A

81A
82A

84A

86A

88A
92A

500A - 550A
31C
33C

Abrasive material

CBN (cubic boron nitride)
Diamond
Pink aluminium oxide
White aluminium oxide
Pink/Ruby aluminium oxide
Ruby aluminium oxide
Pink aluminium oxide / Regular corundum
Monocrystalline corundum
Regular corundum
Ruby aluminium oxide /
Monocrystalline corundum
White/Ruby aluminium oxide
Semi pure corundum /
White aluminium oxide
White/Ruby aluminium oxide/
Monocrystalline corundum
Pink/Ruby aluminium oxide /
Monocrystalline ccorundum
White/Ruby aluminium oxide
White aluminium oxide /
Monocrystalline corundum
Ceralox (Sintered corundum)
Green silicon carbide (pale green)
Dark silicon carbide (black)

*Special grain combinations – wheels for quite specific requirements – can contain up to 6 different grain types and sizes but are identified only by an additional "X".
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Last Update: 30.01.2012
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