1. Using Gauge Rings And Feeler Blades
This is the simplest option and has the benefit of being able to be performed on site and off site. Although the simplest method it still provides some degree of accuracy.
Place a close fitting known size ring over the stabilizer body. These can either be bought or machined for a specific job or tolerance.
Use the feeler blades/gauges between the ring and the bladed area of the stabilizer to check the gap Identify 3 places of equal amounts for a more accurate measurement.
When an acceptable fit between the stabilizer and ring is achieve then the sum of two feeler blade gauge thicknesses should be deducted off the internal known ring size diameter giving the correct blade diameter size.
2. Using A 3 Point Micrometer To Give A Direct Reading Of The Stabilizer
This can be done on site or off site and leave little room for human error giving a much more reliable reading compared to gauge rings and feeler blades.
Find a 3 point micrometer the right size for your tool. Ie 12” OD you’d ideally want to use an 11-12” micrometer and a 12-13” micrometer to be able to check for over and under size particularly when grinding.
Slide the micrometer over the tool and position perfectly level/square to your tool.
Manouveure the micrometer slightly until you find the high point to take the measurement from.
Tighten until the micrometer is just secure and take the reading.
3. Using A Measuring Arm i.e. A Faro Arm To Give A Direct Reading
This can only be done off site as it needs to be in a clean inspection type area with access to a computer and a power supply.
A measuring arm requires a trained operator for use to allow advanced, extremely accurate measuring.