1. Introduction
This manual provides instructions for the proper use and maintenance of the INSIZE Metric Dial Bore Gauges. These precision instruments are designed for accurate measurement of internal diameters in various workpieces, offering high accuracy and repeatability for metalworking and other applications.
2. Specifications
The INSIZE Dial Bore Gauges are available in various models, each designed for specific measuring ranges and applications. Key specifications are detailed below:
| Attribute | Value |
|---|---|
| Brand Name | LIANYU (Marketed as INSIZE) |
| Model Number Series | 2322, 2852, 2108, 2552 |
| Accuracy | 0.01mm (for dial indicators), ±0.015mm to ±0.018mm (for digital indicators) |
| Dial Indicator Style | Horizontal |
| Max Measuring Range | 10-450mm (depending on model) |
| DIY Supplies | Metalworking |
| Origin | Mainland China |
| Display Type | Analog or Digital |
| Certification | CE |
| Packing | Anti-tampering plastic box |
3. Package Contents
Each INSIZE Metric Dial Bore Gauge set typically includes:
- Dial Bore Gauge body (with or without indicator, depending on model)
- Measuring rod
- Set of interchangeable anvils/probes for various measuring ranges
- Setting ring (optional, code 6312)
- Long handle (optional, code 7351)
- Bore gauge setter (optional)
- Protective anti-tampering plastic storage box
- Instruction manual (this document)
4. Setup
Before using the bore gauge, ensure all components are clean and free from debris. Select the appropriate anvils/probes for your desired measuring range.
4.1 Attaching the Indicator
Carefully attach the dial or digital indicator to the bore gauge body. Ensure it is securely fastened to prevent movement during measurement.
4.2 Calibration with Setting Ring
Calibration is crucial for accurate measurements. Use a setting ring of known diameter that is close to the workpiece's internal diameter.
- Place the bore gauge into the setting ring.
- Ensure both measuring probes are in full contact with the inner surface of the setting ring.
- For digital indicators, set the initial value to match the setting ring's diameter.
- Activate the minimum value tracking function (if available on your digital indicator).
- Gently rock the gauge left and right within the setting ring to find the minimum reading. This minimum reading should correspond to the setting ring's diameter.
- Once calibrated, the gauge is ready for measurement.
Video 1: Demonstrates the calibration process using a setting ring and the minimum value tracking function on a digital bore gauge.
5. Operating Instructions
After successful calibration, the bore gauge can be used to measure the internal diameter of a workpiece.
- Carefully insert the bore gauge into the workpiece's internal bore.
- Ensure both measuring probes make full contact with the inner wall of the workpiece.
- Gently rock the gauge left and right to find the minimum reading. This minimum reading represents the true internal diameter of the workpiece.
- Read the measurement directly from the dial or digital display.
5.1 Using Bent Bore Gauges
Some models, such as the bent bore gauge, are specifically designed for measuring internal diameters in workpieces with internal end faces or complex geometries.
6. Maintenance
Proper maintenance ensures the longevity and accuracy of your bore gauge:
- Cleaning: After each use, wipe down the gauge with a clean, soft cloth. For stubborn grime, use a mild, non-corrosive cleaning solution. Ensure no liquid enters the indicator mechanism.
- Storage: Store the bore gauge in its original protective plastic box when not in use. Keep it in a dry, dust-free environment away from direct sunlight and extreme temperatures.
- Lubrication: Periodically apply a thin film of light machine oil to moving parts, such as the measuring rod, to ensure smooth operation.
- Inspection: Regularly inspect the measuring probes and anvils for wear or damage. Replace worn components to maintain accuracy.
- Battery Replacement (Digital Models): If the digital display becomes dim or unresponsive, replace the battery according to the indicator's specific instructions.
7. Troubleshooting
Here are some common issues and their solutions:
- Inaccurate Readings:
- Ensure the gauge is properly calibrated using a setting ring.
- Check for wear or damage on the measuring probes/anvils.
- Verify that the workpiece and gauge are clean.
- Ensure the gauge is held perpendicular to the bore during measurement.
- Sticking Movement:
- Clean the measuring rod and other moving parts.
- Apply a small amount of light machine oil to lubricate.
- Digital Display Not Working (Digital Models):
- Check and replace the battery if necessary.
- Ensure the battery compartment is clean and contacts are secure.
8. User Tips
- Always use the correct size anvils for the bore you are measuring to ensure optimal contact and accuracy.
- When measuring, gently rock the gauge to ensure you capture the true minimum diameter, which is the most accurate reading.
- For highly precise work, allow the gauge and workpiece to acclimate to the same ambient temperature to minimize thermal expansion errors.
- Keep the ceramic probes clean and avoid dropping the instrument to prevent damage to the sensitive measuring surfaces.
9. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the documentation provided with your purchase or contact the manufacturer directly. Keep your purchase receipt as proof of purchase.