Quick-Ship Head Liner Bushings (HL)

Drill Bushings

Product Information

Head Liners are similar to L bushings, but with a head to resist heavy axial loads. HL 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. Note: the "length" listed for an HL bushing refers to its overall length, not its length under the head.

Quick-Ship Drill Bushings are popular bushing sizes that we do our best to keep in stock and ready for same-day shipment 100% of the time. Complete part numbers for all quick-ship HL bushings are listed in the tables below.

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.

OD Tolerance

Standard Liner ID Tolerance:

3/16 to 3/8" +.0001/+.0004

7/16 to 5/8" +.0002/+.0005

3/4" +.0003/+.0006

7/8 to 1" +.0004/+.0007

1-3/8" +.0006/+.0010

1-3/4" +.0008/+.0012

2-1/4" +.0010/+.0015

OD Tolerance

Standard OD Tolerance:

1/2" +.0017/+.0014

3/4 to 1" +.0018/+.0015

1-3/8" +.0022/+.0018

1-3/4" +.0023/+.0019

2-1/4 to 2-3/4" +.0025/+.0021

3 to 4" +.0028/+.0023

4-1/4 to 5" +.0030/+.0025

Material

MATERIAL	HEAT TREAT	FINISH	DFARS	RoHS
1144 or 52100 steel	Heat Treated to achieve Rc 62-64 ID Hardness	-	-	✔

Click here for detailed material and finish specifications.

California residents click here for Prop 65 information.

Other materials are available by special order