How to Use a Brass Gauge to Make Jewelry
A brass gauge is one of the traditional tools in jewelry making and is used to small lengths accurately. All gauges can measure external lengths such as the diameter of a gemstone, and most high-quality gauges also can measure internal lengths such as the diameter of a hole. The following steps will show how to use a brass gauge with jewelry.
Step
1
Place the gemstone on the metal under plate, if available. This flat sheet of metal eliminates the problem of holding the stone and measuring it at the same time.
Step
2
Loosen the screw that prevents the gauge from sliding and keeps the calipers at a fixed distance. Position the gauge so the stone is between the calipers and slide the gauge so the calipers are holding the gemstone. Tighten the screw to hold the calipers in place.
Step
3
Read the fixed scale value. The zero line on the lower (sliding) scale will be between two lines on the upper (fixed) scale. Take the value of the lower number line as the first digit(s) of your measurement.
Step
4
Find the line on the sliding scales that best matches a line on the fixed scale. This provides additional precision to your measurement. Check the units of measure to complete your reading.
Step
5
Look at the following example of reading the gauge measurements. The zero line of the sliding scale is between 19 and 20 so the first part of our measurement is 19. The mark on the sliding scale that lines up best with a line on the fixed scale is numbered 7. Our final value is therefore 19.7.
http://www.ehow.com/how_2191340_use-brass-gauge-jewelry.html
A brass gauge is one of the traditional tools in jewelry making and is used to small lengths accurately. All gauges can measure external lengths such as the diameter of a gemstone, and most high-quality gauges also can measure internal lengths such as the diameter of a hole. The following steps will show how to use a brass gauge with jewelry.
Step
1
Place the gemstone on the metal under plate, if available. This flat sheet of metal eliminates the problem of holding the stone and measuring it at the same time.
Step
2
Loosen the screw that prevents the gauge from sliding and keeps the calipers at a fixed distance. Position the gauge so the stone is between the calipers and slide the gauge so the calipers are holding the gemstone. Tighten the screw to hold the calipers in place.
Step
3
Read the fixed scale value. The zero line on the lower (sliding) scale will be between two lines on the upper (fixed) scale. Take the value of the lower number line as the first digit(s) of your measurement.
Step
4
Find the line on the sliding scales that best matches a line on the fixed scale. This provides additional precision to your measurement. Check the units of measure to complete your reading.
Step
5
Look at the following example of reading the gauge measurements. The zero line of the sliding scale is between 19 and 20 so the first part of our measurement is 19. The mark on the sliding scale that lines up best with a line on the fixed scale is numbered 7. Our final value is therefore 19.7.
http://www.ehow.com/how_2191340_use-brass-gauge-jewelry.html
