what is pitch in screw gauge
Pitch in a screw gauge is the distance the screw moves forward or backward along its axis when you rotate it once completely (one full turn of the circular head).
In simple words
- Imagine twisting the screw gauge head one full turn.
- How much the spindle (moving part) shifts along the main scale in that single turn is called the pitch.
- In many lab screw gauges, this pitch is often 1 mm (meaning one full rotation moves the screw by 1 mm).
How pitch is determined
- Note the initial reading on the main (pitch) scale.
- Rotate the circular head a known number of full turns, say 5 turns.
- Note the final reading on the main scale.
- Calculate pitch using:
Pitch=Distance moved on main scaleNumber of full rotations\text{Pitch}=\frac{\text{Distance moved on main scale}}{\text{Number of full rotations}}Pitch=Number of full rotationsDistance moved on main scale
For example, if the screw moves 5 mm in 5 turns, pitch =5 mm/5=1 mm=5\text{ mm}/5=1\text{ mm}=5 mm/5=1 mm.
Bottom note: Information gathered from public forums or data available on the internet and portrayed here.