| Year | 1918 |
| Date | 12-Dec |
| Volume | 39 |
| Issue | 920 |
| Page | 319 |
| Category | Workshop |
| Part | |
| Title | Safety in Grinding Practice |
| Author | "Fitter" |
| Notes | Outside flange replaced by a small washer, the effect of an uneven flange, of badly machined flanges, a correctly mounted wheel |