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The letter K in the conventional abrasive wheel specified by 51 A 60 K 5 V 05 denotes the-
Question

The letter K in the conventional abrasive wheel specified by 51 A 60 K 5 V 05 denotes the-

A.

Hardness of the wheel

B.

Type of abrasive

C.

Bond material

D.

Structure of the wheel

Correct option is A


In the abrasive wheel specification:
· 51: Manufacturing symbol.
· A: Abrasive type (e.g., Aluminium oxide).
· 60: Grit size.
· K: Grade or hardness of the wheel.
· 5: Structure of the wheel.
· V: Bond material (e.g., vitrified bond).
Grade (K) refers to the hardness, which determines how firmly the abrasive grains are held.

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