What is a screw gauge?
What is a screw gauge?
The Screw Gauge is an instrument to measure the dimensions of very small objects as small as 0.01 mm. The Screw Gauge consists of a ‘U’ shaped metal frame. A hollow cylinder is attached to one end of the frame. Grooves are cut on the inner surface of the cylinder through which a screw passes. On the cylinder parallel to the axis of the screw, a scale is graduated in millimeter called Pitch Scale. One end of the screw is attached to a sleeve. The head of the sleeve is divided into 100 divisions called the Head Scale. The other end of the screw has a plane surface. A stud is attached to the other end of the frame, just opposite the tip of the screw. The screw head is provided with a Ratchet arrangement (safety device) to prevent the user from exerting undue pressure.
The Screw Gauge is an instrument to measure the dimensions of very small objects as small as 0.01 mm. The Screw Gauge consists of a ‘U’ shaped metal frame. A hollow cylinder is attached to one end of the frame. Grooves are cut on the inner surface of the cylinder through which a screw passes. On the cylinder parallel to the axis of the screw, a scale is graduated in millimeter called Pitch Scale. One end of the screw is attached to a sleeve. The head of the sleeve is divided into 100 divisions called the Head Scale. The other end of the screw has a plane surface. A stud is attached to the other end of the frame, just opposite the tip of the screw. The screw head is provided with a Ratchet arrangement (safety device) to prevent the user from exerting undue pressure.
