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Head Liner Bushings
Head Liners are similar to L bushings, but with a head to resist heavy axial loads. HL liners are permanent 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.
Application Information
Head Liners are permanent bushings used to hold renewable drill bushings. The head provides resistance to axial loads, and is usually recessed in the plate.
ID Tolerance
Standard Liner ID Tolerance:
- 3/16 to 3/8" +0.0001/+0.0004
- 7/16 to 5/8" +0.0002/+0.0005
- 3/4" +0.0003/+0.0006
- 7/8 to 1" +0.0004/+0.0007
- 1-3/8" +0.0006/+0.0010
- 1-3/4" +0.0008/+0.0012
- 2-1/4 and up +0.0010/+0.0015
OD Tolerance
Standard OD Tolerance:
- 1/2" +0.0017/+0.0014
- 3/4 to 1" +0.0018/+0.0015
- 1-3/8" +0.0022/+0.0018
- 1-3/4" +0.0023/+0.0019
- 2-1/4 to 2-3/4" +0.0025/+0.0021
- 3 to 4" +0.0028/+0.0023
Unground OD Tolerance:
- 1/2 to 2-1/4" +0.020/+0.015
Material
| Material | Heat Treat | Finish | DFARS | RoHS |
| 1144 Stressproof Steel | Heat treated to achieve Rc 62-64 ID hardness | - | ✔ | ✔ |
Parts Specification
| ID (Inch) | OD (Inch) | Length (Inch) | F Diameter (Inch) | G (Inch) |
| 3/4" | 1" | 1/2" | 1-1/8" | 1/8" |
Warning:
This Product Can Expose You To Materials And/Or Chemicals Including Arsenic, Lead, And Other Materials And/Or Chemicals Which Are Known To The State Of California To Cause Cancer And/Or Reproductive Harm. For more information, visit www.P65Warnings.ca.gov