Go and No-Go Gauge: Types, Advantages and Limitations
As the name suggests, A GO gauge intends "to go" inside the part feature, whereas "No Go gauges" "Not to Go" inside the part feature under consideration.
What are Go No Go Gauge?
As the name suggests, A GO gauge intends "to go" inside the part feature, whereas "No Go gauges" "Not to Go" inside the part feature under consideration. These gauges are available considering the maximum material and Least material condition of the part feature under consideration.
Types of Go No Go Gauge?
Following three types of Go/No-Go gauges are available to control part quality and ensure the interchangeability of the manufactured parts.
1. Plug Gauges
2. Ring Gauges
3. Snap Gauges
Plug Gauge
Plug or pin gauges are simple, accurate cylindrical tools used to verify whether manufactured holes or threads fall within specified limits. They provide an economical and efficient method for quality control.
Ring Gauge
Ring gauges, in contrast to plug gauges, are used to check if manufactured pins, round features, or external threads are within tolerance limits. Ring gauges for threads are typically designed according to ISO 1502 standards.
Snap Gauge
Snap gauges, available in Go/No-Go types, feature two jaws. The first jaw allows parts to pass through, while the second jaw stops the part if it exceeds the limit. This design enables quick and reliable verification of part width compliance.
Advantages of Go No-Go Gauge
The use of Go and No-Go gauges for part verification has the following advantages.
- Simple and accurate.
- Convenient and economical.
- No need to measure feature size to ensure parts are within limits.
- Easy to operate.
Limitations of Go and No-Go Gauges
- Using Go No-Go gauges for quality control has the following limitations.
- Verify parts for fitment only. Their dimensions are not measured.
- Can not monitor gradual deviation in the manufacturing process.
- Recommended to be used only on production parts.
