The Stevens Model 311 Series H micrometer remains a popular choice for precision measurement, favored by machinists, engineers, and hobbyists alike. Its robust design, accuracy, and ease of use have cemented its place as a staple in workshops worldwide. This in-depth guide will explore the features, specifications, and applications of this highly-regarded measuring instrument.
Understanding the Stevens Model 311 Series H
The Stevens Model 311 Series H is a high-quality, outside micrometer designed for precise measurement of external dimensions. The "H" designation likely refers to a specific variation within the 311 series, potentially indicating features like a specific measurement range or material construction. While precise details might vary depending on the specific sub-model, the core characteristics remain consistent across the series.
Key Features and Specifications
While detailed specifications will depend on the exact sub-model (e.g., 311-H-1, 311-H-2, etc.), we can highlight common features found in most Stevens Model 311 Series H micrometers:
- High-Precision Measurement: These micrometers are known for their accuracy, allowing for measurements with a high degree of precision, crucial for various applications requiring tight tolerances.
- Durable Construction: Typically constructed from hardened steel, these micrometers are built to withstand rigorous use in demanding workshop environments.
- Clear and Easy-to-Read Scales: The micrometer features clearly marked scales, facilitating quick and accurate readings, minimizing the potential for errors.
- Ratchet Stop (Often Included): Many models in the 311 series incorporate a ratchet stop, preventing over-tightening of the measuring spindle and ensuring consistent, repeatable measurements.
- Lock Nut (Often Included): A lock nut secures the spindle in position, maintaining the reading even when the micrometer is not in use.
- Various Measurement Ranges: The Stevens Model 311 Series H is likely available in different measurement ranges, catering to various workpiece sizes. Consult the specific product documentation for the exact range of your model.
Applications of the Stevens Model 311 Series H
The versatility of the Stevens Model 311 Series H micrometer makes it suitable for a wide range of applications:
- Machining: Precise measurements are essential for machining operations to ensure parts meet specifications. The 311 Series H is ideal for verifying dimensions during machining and quality control.
- Manufacturing: In manufacturing settings, accurate measurements are critical for ensuring product consistency and quality. This micrometer aids in verifying dimensions and maintaining quality standards.
- Engineering: Engineers use these micrometers for precise measurements in design, prototyping, and testing phases.
- Inspection: Quality control inspections often rely on the accuracy of micrometers like the 311 Series H to confirm parts conform to design standards.
- Hobbyist and DIY Projects: The 311 Series H is also a valuable tool for hobbyists and DIY enthusiasts who require precise measurements for their projects.
Maintaining Your Stevens Model 311 Series H
Proper maintenance ensures the longevity and accuracy of your micrometer. Here are some key tips:
- Regular Cleaning: Keep the micrometer clean and free of debris using a soft cloth and appropriate cleaning solution (consult the manufacturer's instructions).
- Proper Storage: Store your micrometer in a protective case or box when not in use to prevent damage and maintain accuracy.
- Careful Handling: Handle the micrometer with care to avoid dropping or impacting it, which can damage the precision components.
- Periodic Calibration: For critical applications, consider periodic calibration to ensure the micrometer's accuracy remains within acceptable tolerances.
Conclusion
The Stevens Model 311 Series H micrometer represents a reliable and accurate measuring instrument suitable for a variety of applications. Its durable construction, user-friendly design, and precision measurement capabilities make it a valuable asset for professionals and hobbyists alike. Remember to consult the specific product documentation for your model for detailed specifications and maintenance instructions. Understanding the features and proper care will ensure years of accurate and reliable service from your Stevens Model 311 Series H.
