Peacock CG-2 Bore Gauge Unit

Module Feature

CG-2 is a short-hole cylinder gauge made by Peacock (Ozaki Mfg, Japan). It is specially designed for measuring the inner diameter of shallow blind holes and through holes. It can be matched with dial indicator or digital indicator. Equipped with replaceable measuring rods and contact tips, flexible for different bore ranges. Mechanical amplification structure ensures stable measurement repeatability. Hardened contact head, wear-resistant, suitable for machining workshop, quality lab, incoming inspection station. Widely stocked as inspection instrument spare for automotive, machinery and mold workshop.

Working principle

When inserted into the measured hole, the side contact probe is pushed radially by the hole wall. The mechanical lever amplifies tiny radial displacement and transmits it to the indicator, converting bore dimensional variation into pointer or digital reading. The built-in spring mechanism keeps the probe in constant contact with workpiece surface.

Onboard components

Main gauge body, transmission lever assembly, replaceable measuring rod, contact tip, locking knob, indicator mounting thread and internal return spring.

LED indicators

No built-in LED; measurement value is displayed by external dial / digital indicator.

Hardware self‑diagnosis

Check zero drift, contact wear and lever jamming before use. Calibration is performed by ring gauge.Programming softwareNot applicable, mechanical measuring instrument.

Electrical & Process Parameters

Model:CG-2 Brand:Peacock (Ozaki) Device type:Short depth cylinder bore gauge Function:Precision inner diameter measurement for shallow holes

Mechanical & Structure

Mounting:Handheld manual measurement Protection class:IP40 Housing:Hardened steel + aluminum alloy gauge body

Environmental

Operating temperature:0℃ ~ +40℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:5~95% non‑condensing

Certification:JIS industrial measuring instrument standard Status:Original Peacock inspection gauge spare

Installation

Clean workpiece hole and gauge contact before measurement. Set zero position with standard ring gauge, lock indicator, measure hole diameter and check repeatability.

Interface

Indicator mounting thread, interchangeable measuring rod interface.

Diagnostic

Reading unstable: Loose locking knob, worn contact tip, contaminated contact surface. Zero drift: Spring fatigue, lever stuck by chip or dust.

Product BriefCG-2 gauge, Peacock shallow-hole cylinder bore gauge spare for workshop inner diameter inspection.