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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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