Metrology Glossary: Bore Gauge

What Is A Bore Gauge?

A bore gauge is a precision measurement device used for accurately determining internal hole diameters. It comes in various types, including dial, digital, and vernier bore gauges. Dial bore gauges feature indicators on calibrated dials to visualize measurements, while digital ones display measurements electronically, often with data storage capabilities. Vernier bore gauges incorporate vernier scales for meticulous readings. The selection of bore gauge type depends on factors like measurement precision and technological preferences.

What Are Bore Gauges Used For?

Automotive Industry:

Engine Maintenance: Bore gauges assess cylinder wear, aiding decisions on honing or replacement.
Bearing Quality Assurance: Inspecting internal diameters ensures proper fit and identifies wear in bearings.
Fuel Injector Integrity: Bore gauges measure fuel injector bore diameters, ensuring optimal fuel delivery.

Manufacturing:

Precision Control: Bore gauges validate dimensions of machined components such as gears, bushings, and shafts.
Mold and Die Precision: Ensuring consistent product quality by guaranteeing accurate internal cavities in molds and dies.
Pipe and Tube Compliance: Bore gauges measure internal diameters, ensuring compliance with specifications and proper fit.

Aerospace Industry:

Critical Component Inspection: Bore gauges examine internal diameters of vital aircraft components.
Fuel System Integrity: Inspection of fuel lines and valves with bore gauges ensures reliability and identifies wear.
Hydraulic System Validation: Bore gauges measure internal diameters, ensuring proper fluid flow in hydraulic systems.