What if someone insists you check the chamfer gage against a master ring? This will work only if the ring does not have any chamfers. It's also the only way to recover the "Set To" value if it's been lost.
Standard master rings, which you may already use in your shop, all have a slight chamfer. If you're not convinced, use a magnifying glass. The chamfer can be removed by grinding the surface of the ring. Only trust a master machinist for such an operation since these rings are too much of an investment to toy with.
The setting rings we provide have approximate dimensions. In other words, if you order the .5" ring, you may actually get one that reads .4995" In all cases, the actual, verified dimension is printed on the ring. It is then an easy matter to set your chamfer gage to this master.
If you routinely use your chamfer gage for just one dimension, then you may want to invest in a custom ring of that particular size. If you use multiple ranges, then we suggest getting a setting ring for the middle of the range as shown below.
There is no difference between masters used for 0-90° or 90-127° gages.
Each ring comes with an NIST traceable certificate of calibration. Since these are made to order, please allow 4-6 weeks for delivery.
- .5" (approx) master ring for gages reading 0-1" ... $245.00 order now
- 1.5" (approx) master ring for gages reading 1-2" ... $295.00 order now
- 2.5" (approx) master ring for gages reading 2-3" ... $345.00 order now