An outside micrometer is a common tool used as a reference standard to validate or set a dial bore gauge.
Validating or setting a dial bore gauge is crucial for ensuring accurate internal diameter measurements. According to Willrich.com, one of the most frequent techniques involves the use of an outside micrometer. This method allows the user to establish a known, precise dimension using the micrometer.
How an Outside Micrometer is Used for Validation
- Setting a Known Dimension: First, the outside micrometer is adjusted to a specific, desired dimension within the bore gauge's measurement range. This dimension acts as the reference standard.
- Adjusting the Bore Gauge: The dial bore gauge is then placed within the jaws of the micrometer, set to this reference dimension.
- Zeroing or Setting the Dial: The dial indicator on the bore gauge is adjusted to read zero or the corresponding deviation at this known dimension. This process effectively calibrates the bore gauge against the micrometer's standard.
Using a micrometer as a reference standard helps to ensure the dial bore gauge provides accurate readings relative to a known, reliable measurement device. While other methods exist, such as using setting rings or gauge blocks, the micrometer method is widely adopted due to the common availability and versatility of micrometers.
Methods for Setting/Validating a Dial Bore Gauge:
- Outside Micrometer: Uses a micrometer as a flexible reference standard.
- Setting Rings: Precisely machined rings representing specific bore sizes.
- Gauge Blocks: Stackable precision blocks used to build a specific dimension (often used with accessories).
| Validation Tool | Description | Use Case |
|---|---|---|
| Outside Micrometer | Adjustable precision screw gauge | Versatile for various sizes within its range |
| Setting Ring | Fixed, highly accurate internal diameter ring | Ideal for frequent checks at a specific size |
By using one of these methods, particularly the outside micrometer as highlighted in the reference, technicians can validate that the dial bore gauge is set correctly to provide reliable measurements of internal bores.
