🔩 Screw Gauge — one turn is a pitch, the rim splits it into hundredths

One full turn of the thimble advances the spindle by the pitch; the rim divides that pitch into n parts. Read the sleeve and the rim, then correct for zero error.

Walkthrough 1 / 1

The complete picture.

Thickness t 3.74 mm

Pitch 0.5 mm

Circular divisions n 50

Zero error +2 div

L.C. = pitch / n · reading = LSR + (CSR − zero) × L.C.
LSR = 3.5 mm · CSR = 26 · L.C. = 0.01 mm

corrected t = 3.74 mm

Animation speed 1.0×