Liners are permanently installed bushings used to hold renewable drill bushings. The liner's ID has a precise sliding fit with the renewable bushing's OD. The liner accurately locates the renewable bushing and protects the jig plate from wear and damage caused by frequent bushing replacement.
Liners are permanent bushings used to hold renewable drill bushings.

Standard Liner ID Tolerance:
Standard OD Tolerance:
Unground OD Tolerance:
| Material | Heat Treat | Finish | DFARS | RoHS |
| 1144 Stressproof Steel | Heat treated to achieve Rc 62-64 ID hardness | - | ✔ | ✔ |

| ID (Inch) | OD (Inch) | Length (Inch) |
| 5/16" | 1/2" | 5/8" |
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