Conrad Hoffman
Diamond
- Joined
- May 10, 2009
- Location
- Canandaigua, NY, USA
Doing this well seems more difficult than it should be. The go-to method seems to be a circular square, which can be made and verified without too much trouble, though best done on an OD grinder. Haven't got that. Does the following method make sense as another way of doing it?
Machine a small steel monolith, a rectangular or square bar. Grind two sides parallel, something that can be done very accurately, and can be checked with mics. Grind an end to whatever squareness can be achieved without heroic effort.
The bar can now be checked on the two parallel faces for squareness using an old height gauge with the V-front for a ball. Similar to this tool, but way less expensive to DIY yourself- Taft-Peirce 9146 Comparator Square A lot of old scribe rod type gauges have a V in the front where a ball can be seated.
Assuming the square is out a bit, a near certainty, perfect square will be halfway between the two indicator readings. Naturally the base surface can be scraped or reground until true, but it isn't absolutely necessary.
Machine a small steel monolith, a rectangular or square bar. Grind two sides parallel, something that can be done very accurately, and can be checked with mics. Grind an end to whatever squareness can be achieved without heroic effort.
The bar can now be checked on the two parallel faces for squareness using an old height gauge with the V-front for a ball. Similar to this tool, but way less expensive to DIY yourself- Taft-Peirce 9146 Comparator Square A lot of old scribe rod type gauges have a V in the front where a ball can be seated.
Assuming the square is out a bit, a near certainty, perfect square will be halfway between the two indicator readings. Naturally the base surface can be scraped or reground until true, but it isn't absolutely necessary.