| Year | 1990 |
| Date | 18-May |
| Volume | 164 |
| Issue | 3,873 |
| Page | 590 |
| Category | Workshop |
| Part | |
| Title | Overhaul a 4 Jaw (Chuck) |
| Author | Dave Lammas |
| Notes | Describes a method of restoring accuracy and gripping power to a used four jaw chuck. Checking for accuracy, remedial action, grinding on the Quorn machine, grinding on the bench grinder |