How is a spot face hole with 24mm diameter, 5mm deep and spot face diameter 10mm dimensioned?

Mechanical Engineering : Engineering Drawing - Quiz(MCQ)

Î¦24 and Ï†10

Ï†24 SPOT FACE, Ï†10

Ï†10 SPOT FACE, Ï†24 x 5 DEEP

5 SPOT FACE, Ï†24 X Ï†10

Correct Answer : Option (C) : Ï†10 SPOT FACE, Ï†24 x 5 DEEP

Explanation : Holes made by spot facing are dimensioned in this manner ‘φ10 SPOT FACE, φ24 x 5 DEEP’. This means the there is a spot face of 10mm diameter after the 24mm diameter and 5 mm thickness. Using this makes the reading of the dimension easy.

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