Correct option is B
A grinding wheel is identified by a specific
standard marking system that indicates various properties such as
abrasive type, grain size, grade, structure, and bond type. The structure number in this marking
defines the spacing between abrasive grains.
Breaking Down the Code "51 A 46 L5 V-23"
·
"51" → Manufacturer's code (not relevant to standard wheel specification).
·
"A" →
Abrasive type (Aluminum Oxide).
·
"46" →
Grain size (Medium grain).
·
"L" →
Grade (Hardness of the bond) (Medium hard).
·
"5" →
Structure (Denotes the spacing between abrasive grains).
·
"V" →
Bond type (Vitrified).
·
"23" → Additional manufacturer-specific details.
