The VÖLKEL Precision Thread Ring Gauge is a high-quality tool for the reliable inspection of external threads with the NPT standard. As a "GO" gauge, it ensures that your thread meets the required tolerance. Its precise manufacturing guarantees compliance with the strict standards of ANSI / ASME B 1.20.1.
The GO thread ring gauge must be possible to manually screw into the entire thread of the part (without using excessive force). If unable to do so, the thread does not meet the requested standards (=scrap).
Important note: The reference temperature for parts and gauges is 20° Celsius.
As a manufacturer, VÖLKEL will issue a factory calibration certificate upon request (price on request). Calibration is carried out at a measurement laboratory independent of VÖLKEL production, according to specifications and standards (DIN, ISO, ANSI) defined for the respective specimen. Calibration is performed using IAC thread scanners.
Q: What is an NPT thread and what is it used for?
A: NPT (National Pipe Taper) threads are common tapered threads in the USA, used primarily for pipe connections in pneumatics and hydraulics. Their conical shape ensures a tight seal without the need for additional sealants.
Q: How does this ring gauge differ from a metric thread ring gauge?
A: This ring gauge is designed specifically for the tapered NPT thread according to ANSI standards. It checks not only the diameter but also the correct taper and pitch of the thread, which is not the case with metric thread gauges designed for cylindrical threads.
Q: Why is a factory calibration certificate important for this product?
A: A factory calibration certificate attests to the precision and accuracy of the gauge by an independent measurement laboratory. This is essential in industries with high quality requirements (e.g., automotive, aerospace) or during audits to ensure the traceability of the measuring equipment.
Q: Why is the article called a "thread ring gauge" when it's only one gauge?
A: In the English-speaking world, such a gauge is often referred to as a "GO Gauge," which checks the maximum limit of the external thread. Even though no NO-GO gauge is supplied with this item, the gauge is used to check a limit value and is therefore referred to as a limit gauge.
Q: What maintenance does the ring gauge require?
A: To maintain its precision, the gauge should be cleaned regularly and protected from rust. Storing it in its designated case protects it from damage and contamination. Regular recalibration is recommended depending on the frequency of use.
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| Type of thread | american tapered pipe thread, taper 1:16 |
|---|---|
| Standard | ANSI /ASME B 1.20.1 |
| Size | NPT 1/8 x 27 |
| Item number | 16485 |
| Gauge dimension | ANSI /ASME B 1.20.1 |
| Thread standard | ANSI B1.20.1 |
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