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Head Liner Bushings (HL)

Drill Bushings

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Product Information

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. Note: the "length" listed for an HL bushing refers to its overall length, not its length under the head.

Complete part numbers for all standard Head Liner 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.

ID 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 and up +.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

Unground OD Tolerance:

1/2 to 2-1/4" +.020/+.015

To order liner bushings with an unground OD, add "U" on Price & Availability screen:

HL-32-16 Standard liner bushing

HL-32-16U Standard unground liner bushing

Material

MATERIAL	HEAT TREAT	FINISH	DFARS	RoHS
1144 Stressproof 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

Head Liner Bushings (HL)

Standard Sizes

QUANTITY	PART NO.	ID	OD	LENGTH	F DIA	G
	HL-32-5	5/16	1/2	5/16	5/8	3/32
	HL-32-6	5/16	1/2	3/8	5/8	3/32
	HL-32-8	5/16	1/2	1/2	5/8	3/32
	HL-32-12	5/16	1/2	3/4	5/8	3/32
	HL-32-16	5/16	1/2	1	5/8	3/32
	HL-32-22	5/16	1/2	1-3/8	5/8	3/32
	HL-48-5	1/2	3/4	5/16	7/8	3/32
	HL-48-6	1/2	3/4	3/8	7/8	3/32
	HL-48-8	1/2	3/4	1/2	7/8	3/32
	HL-48-12	1/2	3/4	3/4	7/8	3/32
	HL-48-16	1/2	3/4	1	7/8	3/32
	HL-48-22	1/2	3/4	1-3/8	7/8	3/32
	HL-48-24	1/2	3/4	1-1/2	7/8	3/32
	HL-48-28	1/2	3/4	1-3/4	7/8	3/32
	HL-48-34	1/2	3/4	2-1/8	7/8	3/32
	HL-64-8	3/4	1	1/2	1-1/8	1/8
	HL-64-12	3/4	1	3/4	1-1/8	1/8
	HL-64-16	3/4	1	1	1-1/8	1/8
	HL-64-22	3/4	1	1-3/8	1-1/8	1/8
	HL-64-24	3/4	1	1-1/2	1-1/8	1/8
	HL-64-28	3/4	1	1-3/4	1-1/8	1/8
	HL-64-34	3/4	1	2-1/8	1-1/8	1/8
	HL-64-40	3/4	1	2-1/2	1-1/8	1/8
	HL-64-48	3/4	1	3	1-1/8	1/8
	HL-88-8	1	1-3/8	1/2	1-1/2	1/8
	HL-88-12	1	1-3/8	3/4	1-1/2	1/8
	HL-88-16	1	1-3/8	1	1-1/2	1/8
	HL-88-22	1	1-3/8	1-3/8	1-1/2	1/8
	HL-88-24	1	1-3/8	1-1/2	1-1/2	1/8
	HL-88-28	1	1-3/8	1-3/4	1-1/2	1/8
	HL-88-34	1	1-3/8	2-1/8	1-1/2	1/8
	HL-88-40	1	1-3/8	2-1/2	1-1/2	1/8
	HL-88-48	1	1-3/8	3	1-1/2	1/8
	HL-112-12	1-3/8	1-3/4	3/4	1-7/8	3/16
	HL-112-16	1-3/8	1-3/4	1	1-7/8	3/16
	HL-112-22	1-3/8	1-3/4	1-3/8	1-7/8	3/16
	HL-112-24	1-3/8	1-3/4	1-1/2	1-7/8	3/16
	HL-112-28	1-3/8	1-3/4	1-3/4	1-7/8	3/16
	HL-112-34	1-3/8	1-3/4	2-1/8	1-7/8	3/16
	HL-112-40	1-3/8	1-3/4	2-1/2	1-7/8	3/16
	HL-112-48	1-3/8	1-3/4	3	1-7/8	3/16
	HL-144-12	1-3/4	2-1/4	3/4	2-3/8	3/16
	HL-144-16	1-3/4	2-1/4	1	2-3/8	3/16
	HL-144-22	1-3/4	2-1/4	1-3/8	2-3/8	3/16
	HL-144-24	1-3/4	2-1/4	1-1/2	2-3/8	3/16
	HL-144-28	1-3/4	2-1/4	1-3/4	2-3/8	3/16
	HL-144-34	1-3/4	2-1/4	2-1/8	2-3/8	3/16
	HL-144-40	1-3/4	2-1/4	2-1/2	2-3/8	3/16
	HL-144-48	1-3/4	2-1/4	3	2-3/8	3/16
	HL-176-12	2-1/4	2-3/4	3/4	2-7/8	3/16
	HL-176-16	2-1/4	2-3/4	1	2-7/8	3/16
	HL-176-22	2-1/4	2-3/4	1-3/8	2-7/8	3/16
	HL-176-24	2-1/4	2-3/4	1-1/2	2-7/8	3/16
	HL-176-28	2-1/4	2-3/4	1-3/4	2-7/8	3/16
	HL-176-34	2-1/4	2-3/4	2-1/8	2-7/8	3/16
	HL-176-40	2-1/4	2-3/4	2-1/2	2-7/8	3/16
	HL-176-48	2-1/4	2-3/4	3	2-7/8	3/16

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Extended Sizes

QUANTITY	PART NO.	ID	OD	LENGTH	F DIA	G
	HL-160-12	2	2-1/2	3/4	2-5/8	3/16
	HL-160-16	2	2-1/2	1	2-5/8	3/16
	HL-160-20	2	2-1/2	1-1/4	2-5/8	3/16
	HL-160-24	2	2-1/2	1-1/2	2-5/8	3/16
	HL-160-28	2	2-1/2	1-3/4	2-5/8	3/16
	HL-160-32	2	2-1/2	2	2-5/8	3/16
	HL-160-34	2	2-1/2	2-1/8	2-5/8	3/16
	HL-160-36	2	2-1/2	2-1/4	2-5/8	3/16
	HL-160-40	2	2-1/2	2-1/2	2-5/8	3/16
	HL-160-44	2	2-1/2	2-3/4	2-5/8	3/16
	HL-160-48	2	2-1/2	3	2-5/8	3/16
	HL-160-52	2	2-1/2	3-1/4	2-5/8	3/16
	HL-160-56	2	2-1/2	3-1/2	2-5/8	3/16
	HL-160-60	2	2-1/2	3-3/4	2-5/8	3/16
	HL-160-64	2	2-1/2	4	2-5/8	3/16
	HL-160-68	2	2-1/2	4-1/4	2-5/8	3/16
	HL-160-72	2	2-1/2	4-1/2	2-5/8	3/16
	HL-160-76	2	2-1/2	4-3/4	2-5/8	3/16
	HL-160-80	2	2-1/2	5	2-5/8	3/16
	HL-192-12	2-1/2	3	3/4	3-1/8	3/16
	HL-192-16	2-1/2	3	1	3-1/8	3/16
	HL-192-20	2-1/2	3	1-1/4	3-1/8	3/16
	HL-192-24	2-1/2	3	1-1/2	3-1/8	3/16
	HL-192-28	2-1/2	3	1-3/4	3-1/8	3/16
	HL-192-32	2-1/2	3	2	3-1/8	3/16
	HL-192-34	2-1/2	3	2-1/8	3-1/8	3/16
	HL-192-36	2-1/2	3	2-1/4	3-1/8	3/16
	HL-192-40	2-1/2	3	2-1/2	3-1/8	3/16
	HL-192-44	2-1/2	3	2-3/4	3-1/8	3/16
	HL-192-48	2-1/2	3	3	3-1/8	3/16
	HL-192-52	2-1/2	3	3-1/4	3-1/8	3/16
	HL-192-56	2-1/2	3	3-1/2	3-1/8	3/16
	HL-192-60	2-1/2	3	3-3/4	3-1/8	3/16
	HL-192-64	2-1/2	3	4	3-1/8	3/16
	HL-192-68	2-1/2	3	4-1/4	3-1/8	3/16
	HL-192-72	2-1/2	3	4-1/2	3-1/8	3/16
	HL-192-76	2-1/2	3	4-3/4	3-1/8	3/16
	HL-192-80	2-1/2	3	5	3-1/8	3/16
	HL-216-12	2-3/4	3-3/8	3/4	3-1/2	3/16
	HL-216-16	2-3/4	3-3/8	1	3-1/2	3/16
	HL-216-20	2-3/4	3-3/8	1-1/4	3-1/2	3/16
	HL-216-24	2-3/4	3-3/8	1-1/2	3-1/2	3/16
	HL-216-28	2-3/4	3-3/8	1-3/4	3-1/2	3/16
	HL-216-32	2-3/4	3-3/8	2	3-1/2	3/16
	HL-216-34	2-3/4	3-3/8	2-1/8	3-1/2	3/16
	HL-216-36	2-3/4	3-3/8	2-1/4	3-1/2	3/16
	HL-216-40	2-3/4	3-3/8	2-1/2	3-1/2	3/16
	HL-216-44	2-3/4	3-3/8	2-3/4	3-1/2	3/16
	HL-216-48	2-3/4	3-3/8	3	3-1/2	3/16
	HL-216-52	2-3/4	3-3/8	3-1/4	3-1/2	3/16
	HL-216-56	2-3/4	3-3/8	3-1/2	3-1/2	3/16
	HL-216-60	2-3/4	3-3/8	3-3/4	3-1/2	3/16
	HL-216-64	2-3/4	3-3/8	4	3-1/2	3/16
	HL-216-68	2-3/4	3-3/8	4-1/4	3-1/2	3/16
	HL-216-72	2-3/4	3-3/8	4-1/2	3-1/2	3/16
	HL-216-76	2-3/4	3-3/8	4-3/4	3-1/2	3/16
	HL-216-80	2-3/4	3-3/8	5	3-1/2	3/16
	HL-232-12	3"	3-5/8	3/4	3-7/8	3/16
	HL-232-16	3"	3-5/8	1	3-7/8	3/16
	HL-232-20	3"	3-5/8	1-1/4	3-7/8	3/16
	HL-232-24	3"	3-5/8	1-1/2	3-7/8	3/16
	HL-232-28	3"	3-5/8	1-3/4	3-7/8	3/16
	HL-232-32	3"	3-5/8	2	3-7/8	3/16
	HL-232-36	3"	3-5/8	2-1/4	3-7/8	3/16
	HL-232-40	3"	3-5/8	2-1/2	3-7/8	3/16
	HL-232-44	3"	3-5/8	2-3/4	3-7/8	3/16
	HL-232-48	3"	3-5/8	3	3-7/8	3/16
	HL-232-52	3"	3-5/8	3-1/4	3-7/8	3/16
	HL-232-56	3"	3-5/8	3-1/2	3-7/8	3/16
	HL-232-60	3"	3-5/8	3-3/4	3-7/8	3/16
	HL-232-64	3"	3-5/8	4	3-7/8	3/16
	HL-232-68	3"	3-5/8	4-1/4	3-7/8	3/16
	HL-232-72	3"	3-5/8	4-1/2	3-7/8	3/16
	HL-232-76	3"	3-5/8	4-3/4	3-7/8	3/16
	HL-232-80	3"	3-5/8	5	3-7/8	3/16
	HL-248-12	3-1/4	3-7/8	3/4	4-1/8	3/16
	HL-248-16	3-1/4	3-7/8	1	4-1/8	3/16
	HL-248-20	3-1/4	3-7/8	1-1/4	4-1/8	3/16
	HL-248-24	3-1/4	3-7/8	1-1/2	4-1/8	3/16
	HL-248-28	3-1/4	3-7/8	1-3/4	4-1/8	3/16
	HL-248-32	3-1/4	3-7/8	2	4-1/8	3/16
	HL-248-36	3-1/4	3-7/8	2-1/4	4-1/8	3/16
	HL-248-40	3-1/4	3-7/8	2-1/2	4-1/8	3/16
	HL-248-44	3-1/4	3-7/8	2-3/4	4-1/8	3/16
	HL-248-48	3-1/4	3-7/8	3	4-1/8	3/16
	HL-248-52	3-1/4	3-7/8	3-1/4	4-1/8	3/16
	HL-248-56	3-1/4	3-7/8	3-1/2	4-1/8	3/16
	HL-248-60	3-1/4	3-7/8	3-3/4	4-1/8	3/16
	HL-248-64	3-1/4	3-7/8	4	4-1/8	3/16
	HL-248-68	3-1/4	3-7/8	4-1/4	4-1/8	3/16
	HL-248-72	3-1/4	3-7/8	4-1/2	4-1/8	3/16
	HL-248-76	3-1/4	3-7/8	4-3/4	4-1/8	3/16
	HL-248-80	3-1/4	3-7/8	5	4-1/8	3/16
	HL-256-12	3-3/8	4"	3/4	4-1/4	3/16
	HL-256-16	3-3/8	4"	1	4-1/4	3/16
	HL-256-20	3-3/8	4"	1-1/4	4-1/4	3/16
	HL-256-24	3-3/8	4"	1-1/2	4-1/4	3/16
	HL-256-28	3-3/8	4"	1-3/4	4-1/4	3/16
	HL-256-32	3-3/8	4"	2	4-1/4	3/16
	HL-256-36	3-3/8	4"	2-1/4	4-1/4	3/16
	HL-256-40	3-3/8	4"	2-1/2	4-1/4	3/16
	HL-256-44	3-3/8	4"	2-3/4	4-1/4	3/16
	HL-256-48	3-3/8	4"	3	4-1/4	3/16
	HL-256-52	3-3/8	4"	3-1/4	4-1/4	3/16
	HL-256-56	3-3/8	4"	3-1/2	4-1/4	3/16
	HL-256-60	3-3/8	4"	3-3/4	4-1/4	3/16
	HL-256-64	3-3/8	4"	4	4-1/4	3/16
	HL-256-68	3-3/8	4"	4-1/4	4-1/4	3/16
	HL-256-72	3-3/8	4"	4-1/2	4-1/4	3/16
	HL-256-76	3-3/8	4"	4-3/4	4-1/4	3/16
	HL-256-80	3-3/8	4"	5	4-1/4	3/16
	HL-256-88	3-3/8	4"	5-1/2	4-1/4	3/16

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