Calipers with long jaws are precision measuring instruments designed for accessing and measuring hard-to-reach areas or larger workpieces. They offer versatility and accuracy across various industries, from metalworking and woodworking to quality control and inspection. This article explores the types, features, applications, and manufacturers of these specialized calipers.
Understanding Calipers with Long Jaws
Calipers with long jaws are essentially calipers with extended measuring arms, allowing for measurements deep within cavities, around obstructions, or on large objects where standard calipers would fall short. The extended jaws maintain parallelism and rigidity, ensuring accurate readings.
Types of Calipers with Long Jaws
While the fundamental design remains consistent, calipers with long jaws come in several types, each suited for specific applications:
- Vernier Calipers with Long Jaws: These calipers use a vernier scale for precise readings. They are known for their robustness and lack of reliance on batteries.
- Digital Calipers with Long Jaws: Featuring a digital display, these calipers offer ease of reading and often include functions like zeroing, inch/mm conversion, and data output.
- Dial Calipers with Long Jaws: These calipers use a dial indicator for displaying measurements. They provide quick readings and are generally more resistant to environmental factors than digital calipers.
- Inside Calipers with Long Jaws: Specifically designed for measuring internal dimensions with long jaws, allowing measurement of internal features at a distance.
- Outside Calipers with Long Jaws: Designed for external dimension measurement, offering precise measurement of external features.
Key Features to Consider
When selecting calipers with long jaws, consider the following features:
- Jaw Length: The most crucial factor. Determine the maximum depth or distance you need to measure.
- Accuracy and Resolution: Ensure the calipers meet the required precision for your application. Check the manufacturer's specifications for accuracy and resolution.
- Material: Hardened stainless steel is preferred for durability and resistance to corrosion.
- Digital vs. Analog: Choose between digital, vernier, or dial based on ease of use, reading preference, and environmental considerations.
- Data Output: If data logging or analysis is required, opt for calipers with data output capabilities (e.g., USB, RS-232).
- Ergonomics: Consider the handle design and overall weight for comfortable and prolonged use.
Applications of Calipers with Long Jaws
Calipers with long jaws are indispensable in various industries:
- Metalworking: Measuring internal diameters of pipes, depths of bores, and distances between features on large components.
- Woodworking: Measuring the thickness of panels, the depth of mortises, and the internal dimensions of boxes.
- Quality Control: Inspecting manufactured parts for dimensional accuracy, especially in hard-to-reach areas.
- Automotive: Measuring brake rotor thickness, cylinder bore diameters, and other critical engine components.
- Aerospace: Ensuring the precision of aircraft components, where accurate measurements in confined spaces are essential.
Leading Calipers with Long Jaws Manufacturers
Several reputable manufacturers offer high-quality calipers with long jaws. Here are some of the notable players:
- Mitutoyo: Known for their precision measuring instruments, Mitutoyo offers a wide range of calipers with long jaws, including digital, vernier, and dial models.
- Starrett: A trusted name in precision tools, Starrett provides durable and accurate calipers suitable for various applications.
- Mahr: Mahr offers high-precision measuring instruments, including calipers with long jaws designed for demanding industrial environments.
- Brown & Sharpe: Renowned for their quality and reliability, Brown & Sharpe calipers are a popular choice among professionals.
- Wayleading Tools: A rising manufacturer that specializes in various types of calipers, including calipers with long jaws. Wayleading Tools emphasizes precision and customer satisfaction, offering competitive prices.
Selecting the Right Calipers: A Practical Guide
Choosing the correct calipers involves considering your specific needs and application. Here's a step-by-step approach:
- Define Measurement Requirements: Determine the maximum jaw length required and the necessary accuracy.
- Consider the Material: Choose calipers made from hardened stainless steel for durability.
- Select the Appropriate Type: Opt for digital, vernier, or dial calipers based on your preference and application requirements.
- Check Additional Features: Look for features like data output, zeroing, and inch/mm conversion if needed.
- Read Reviews and Compare Prices: Research different brands and models, read user reviews, and compare prices to find the best value.
Maintenance and Calibration
Proper maintenance is crucial for ensuring the accuracy and longevity of your calipers with long jaws:
- Cleaning: Regularly clean the jaws and body with a soft cloth to remove dirt and debris.
- Storage: Store the calipers in a protective case to prevent damage.
- Calibration: Calibrate the calipers periodically using a calibration standard to ensure accuracy. The frequency of calibration depends on usage and application requirements. Contact a qualified calibration service for professional calibration.
Troubleshooting Common Issues
Even with proper care, calipers may encounter issues. Here are some common problems and solutions:
- Inaccurate Readings: Check for dirt or debris on the jaws, ensure proper zeroing, and calibrate the calipers.
- Digital Display Issues: Replace the battery or check the connections.
- Jaws Not Moving Smoothly: Clean and lubricate the moving parts.
Calipers with Long Jaws: Examples and Specifications
Below is a comparison table of different calipers with long jaws. Note that specifications are based on standard models and may vary depending on the manufacturer.
Manufacturer | Model | Type | Jaw Length (mm) | Accuracy (mm) | Resolution (mm) |
---|
Mitutoyo | 505-747 | Vernier | 150 | ±0.05 | 0.02 |
Starrett | 120-6 | Vernier | 150 | ±0.05 | 0.02 |
Mahr | 4100200 | Digital | 150 | ±0.03 | 0.01 |
Wayleading Tools | WL-LC600 | Digital | 150 | ±0.03 | 0.01 |
Note: Specifications are based on standard models and may vary depending on the manufacturer.
The table above provides a comparison of different models from several calipers with long jaws manufacturers.
Conclusion
Calipers with long jaws are essential tools for professionals requiring precise measurements in hard-to-reach areas or on larger workpieces. By understanding the different types, features, and applications, you can choose the right calipers to meet your specific needs. Proper maintenance and calibration will ensure accuracy and longevity, making these tools a valuable asset in your work. If you are looking for high quality calipers, consider exploring Wayleading Tools.
References:
- Mitutoyo Official Website: https://www.mitutoyo.com/