Fixed progressive and adjustable snap gauges for fast GO/NO-GO checks on shafts, pins and turned parts, made in Coimbatore to the limits on your drawing.
A snap gauge is a GO / NO-GO limit gauge for an external diameter. The shaft is pushed through the gauge’s gap: it must pass the GO anvils and must not pass the NO-GO anvils. There is no reading to take, which is why snap gauges are used on production lines where every part is checked and a micrometer would be slower than the machine.
DSN Enterprises manufactures snap gauges in Coimbatore alongside our plain plug and ring gauges. Each gauge is made to the GO and NO-GO limits of the feature on your drawing, following the gauging practice in IS 3455.
Single-ended plate snap gauges of the progressive type described in IS 8023, up to 160 mm. The GO gap sits at the mouth and the NO-GO gap behind it, so one push checks both limits: a good shaft passes the first anvils and stops at the second.
A frame with anvils that are set to your limits and locked. When the drawing changes or the anvils wear, the gauge is reset and recalibrated rather than replaced.
A snap gauge touches the shaft at two opposed points, like a micrometer. A shaft with odd-numbered lobing — the three- and five-lobed shapes that centreless grinding tends to produce — reads the same diameter at every orientation between two points, so a snap gauge can pass a shaft that will not assemble. A ring gauge checks the whole circumference and catches it.
The practical rule: for centreless ground shafts, use a plain ring gauge for final acceptance unless roundness is verified separately; for shafts turned between centres, a snap gauge is usually sufficient and faster. The full comparison, including cost per inspection point, is in snap gauge vs ring gauge: pick by the form error.
| Types | Fixed progressive and adjustable |
| Fixed range | Single-ended, up to 160 mm |
| Limits | Set to the GO / NO-GO limits on your drawing |
| Anvils | Hardened, wear-resistant contacts |
| Finish | Precision ground measuring faces |
| Certificate | Calibration available on dispatch |
A limit gauge is made to the limits of the feature it checks, so a quote starts from the feature, not from a catalogue number. Send these and we can price the job without coming back with questions.
Or call +91 93631 22005.
Send the shaft size and tolerance, or the drawing, and we will quote fixed or adjustable snap gauges set to your limits.