Head-type Liner Bushing (Type HL) — Dimensions Table
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Head-type liner bushing (Type HL)
Range of
Hole
Sizes in
Renewable
Bushings
|
Inside
Diameter
A
|
Body Diameter B
|
Body
Length
+/- 1/64
C
|
Radius
Min.
D
|
Head
Diameter
+/- 1/64
E
|
Head
Thickness
+/- 1/64
F
|
Number
|
| Nominal |
Finished |
| Nom. |
Max. |
Min. |
1/6
to
#10 |
5/16 |
0.3129 |
0.3126 |
1/2 |
0.5017 |
0.5014 |
5/16 |
3/64 |
5/8 |
3/32 |
HL-32-5 |
| 3/8 | HL-32-6 |
| 1/2 | HL-32-8 |
| 3/4 | HL-32-12 |
| 1 | HL-32-16 |
5/32
to
11/32 |
1/2 |
0.5005 |
0.5002 |
3/4 |
0.7518 |
0.7515 |
5/16 |
1/16 |
7/8 |
3/32 |
HL-48-5 |
| 3/8 | HL-48-6 |
| 1/2 | HL-48-8 |
| 3/4 | HL-48-12 |
| 1 | HL-48-16 |
| 1 3/8 | HL-48-22 |
| 1 3/4 | HL-48-28 |
5/16
to
9/16 |
3/4 |
0.7506 |
0.7503 |
1 |
1.0018 |
1.0015 |
1/2 |
1/16 |
1 1/8 |
1/8 |
HL-64-8 |
| 3/4 | HL-64-12 |
| 1 | HL-64-16 |
| 1 3/8 | HL-64-22 |
| 1 3/4 | HL-64-28 |
| 2 1/8 | HL-64-34 |
| 2 1/2 | HL-64-40 |
1/2
to
3/4 |
1 |
1.0007 |
1.0004 |
1 3/8 |
1.3772 |
1.3768 |
1/2 |
3/32 |
1 1/2 |
1/8 |
HL-88-8 |
| 3/4 | HL-88-12 |
| 1 | HL-88-16 |
| 1 3/8 | HL-88-22 |
| 1 3/4 | HL-88-28 |
| 2 1/8 | HL-88-34 |
| 2 1/2 | HL-88-40 |
3/4
to
1 1/16 |
1 3/8 |
1.3760 |
1.3756 |
1 3/4 |
1.7523 |
1.7519 |
3/4 |
3/32 |
1 7/8 |
3/16 |
HL-112-12 |
| 1 | HL-112-16 |
| 1 3/8 | HL-112-22 |
| 1 3/4 | HL-112-28 |
| 2 1/8 | HL-112-34 |
| 2 1/2 | HL-112-40 |
| 3 | HL-112-48 |
1
to
1 3/8 |
1 3/4 |
1.7512 |
1.7508 |
2 1/4 |
2.2525 |
2.2521 |
1 |
3/32 |
2 3/8 |
3/16 |
HL-144-16 |
| 1 3/8 | HL-144-22 |
| 1 3/4 | HL-144-28 |
| 2 1/8 | HL-144-34 |
| 2 1/2 | HL-144-40 |
| 3 | HL-144-48 |
1 3/8
to
1 3/4 |
2 1/4 |
2.2515 |
2.2510 |
2 3/4 |
2.7526 |
2.7522 |
1 |
1/8 |
2 7/8 |
3/16 |
HL-176-16 |
| 1 3/8 | HL-176-22 |
| 1 3/4 | HL-176-28 |
| 2 1/8 | HL-176-34 |
| 2 1/2 | HL-176-40 |
| 3 | HL-176-48 |
Note: Diameter A must be concentric to Diameter B within
0.0005 T.I.R. on finish ground bushings.
Supplements
Reference
- ASME B94.33-1996 — Jig Bushings (Inch Series)
About Type HL (Headed Liner) Bushings
Type HL bushings provide a precise, replaceable seat for renewable drill bushings. The head registers on the fixture
face to control location, while the body bore receives the renewable element. The table above lists Inside Diameter A,
Body Diameter B (nominal and finished limits), Body Length C, minimum corner Radius D, Head Diameter E, Head Thickness F,
and the standard Number designation.
FAQ
How do I use the table to select a bushing?
Start from the renewable bushing hole range, confirm the matching A and B values, then choose length C and head dimensions suitable for your fixture thickness.
What if I need metric sizes?
This page covers inch series per ASME B94.33. For metric fixtures, consult the metric bushing standard or your supplier’s catalog.