| Year | 2012 |
| Date | 24-Aug |
| Volume | 209 |
| Issue | 4,437 |
| Page | 288 |
| Category | Workshop |
| Part | 3 |
| Title | Self Centering Caliper Knurling Tool |
| Author | Keith Johnson |
| Notes | Designs and builds a simple tool. The mounting block, setting the height, assembly, knurls, the tool in use - with nostalgic speed comparisons, how I use the tool, finally |