internal dial caliper gages
Internal Dial Caliper Gages – Precision Tools for Bore & Groove Measurement
An Internal Dial Caliper Gage is a specialized measuring tool designed to measure internal dimensions such as bores, grooves, and slots with high precision. Featuring a dial indicator and spring-loaded measuring contacts, these gages allow accurate, repeatable measurements of internal features without removing the workpiece from its setup.
Ideal for quality control and machining operations, internal dial caliper gages offer fast, comparative measurements with minimal operator influence—making them a reliable choice for inspection and production floor use.
Key Features of Internal Dial Caliper Gages
High Accuracy & Repeatability
Ideal for tight-tolerance inspections.
Easy-to-Read Dial Indicator
Clear analogy display for quick readings.
Spring-Loaded Contact Points
Consistent measuring pressure.
Replaceable Contact Tips
Carbide or steel options for various materials.
Applications of Internal Dial Caliper Gages
- Machining & CNC Workshops: Measuring internal diameters of turned or bored components.
- Automotive Industry: Checking cylinders, engine bores, and bearing housings.
- Tool & Die Manufacturing: Measuring grooves, slots, and recesses.
- Aerospace & Defense: Ensuring precision in critical internal components.
- Inspection & QA Labs: Providing reliable internal dimension checks.
- Hydraulic & Pneumatic Industries: Measuring internal tubing and valve dimensions.
How to Use an Internal Dial Caliper Gage
- Zero the Gage: Use a master ring or setting gage to calibrate the dial.
- Insert into Part: Carefully insert the contact arms into the bore or groove.
- Set Zero Point: Align the jaws and set the dial to zero before measuring.
- Record the Measurement: Use the dial reading plus setting size to get the final measurement.
- Tip: Always use with a calibrated setting master for best accuracy.
Technical Specifications
| Feature | Details |
|---|---|
| Measuring Range | 6 mm to 300 mm / 0.24″ to 12″ (varies by model) |
| Resolution | 0.01 mm / 0.0005 inch |
| Accuracy | ±0.005 mm / ±0.0002 inch |
| Contact Points | Carbide-tipped, stainless steel, or replaceable inserts |
| Indicator Type | Mechanical analogy dial |
| Adjustment | Fine-tuning via thumb screw or adjustment knob |
| Calibration Method | External ring gage or setting master |
| Construction | Hardened steel or anodized aluminium frame |
| Carry Case | Supplied with foam-lined protective box |
