0.50 + (25 × 0.01) = 0.75 mm Explanation: Sleeve shows 0 + half-mm line = 0.50 Section B Solutions 6. Sleeve = 1.50 mm, Thimble = 0.42 mm Total = 1.92 mm
12.50 + (15 × 0.01) = 12.65 mm Explanation: Half-mm visible = add 0.50 micrometer screw gauge worksheet with solution
Sleeve shows: 12 mm (half-mm line IS visible) Thimble aligns: 15 divisions Reading = ______ mm Quick Reference: Common Mistakes | Mistake | Correction
– Human hair is ~0.02–0.2 mm thick. A 0.01 mm resolution micrometer can measure it, though carefully. Quick Reference: Common Mistakes | Mistake | Correction | |---------|-------------| | Forgetting the half mm | Always check the short line above the main scale. | | Misreading thimble (e.g., 32 as 0.32) | That’s correct, but remember: 32 = 0.32 mm. | | Ignoring zero error | Always check and subtract/add before final answer. | | Parallax error | Read the thimble alignment straight-on, not at an angle. | | | Parallax error | Read the thimble
– The ratchet slips when the correct pressure is applied, preventing damage to the screw or object.
Sleeve shows: 8 mm (half-mm line visible) Thimble aligns: 3 divisions Reading = ______ mm