Description
Head Press-Fit Bushings (H)
H Bushings are similar to P bushings, but with a head to resist heavy axial loads. Type H bushings are permanently pressed into the jig plate. H bushings are generally used for single-operation drilling or reaming, when you do not expect to replace bushings during the tooling’s lifetime. The head of type H bushings can be left exposed, or recessed by counterboring the installation hole.
Application Information
H bushings are permanently pressed into the jig plate. The head can be left exposed, or recessed by counterboring the installation hole.
ID Tolerance
Standard ID Tolerance:
From #80 to 1/4 +0.0001/+0.0004
Over 1/4 to 3/4 +0.0001/+0.0005
Over 3/4 to 1-1/2 +0.0002/+0.0006
Over 1-1/2 and up +0.0003/+0.0007
Reamer ID Tolerance (Special):
From #80 to 1/4 +0.0005/+0.0008
Over 1/4 to 3/4 +0.0006/+0.0010
Over 3/4 to 1-1/2 +0.0008/+0.0012
OD Tolerance
Standard OD Tolerance:
3/4 to 1 +0.0018/+0.0015
Unground OD Tolerance:
1/2 to 2-1/4 +0.020/+0.015
No-Counterbore Option on Long Bushings
Extremely long bushings with a small ID size are counterbored according to ANSI standards for proper drill-bearing length to eliminate binding and heat buildup. Add “-NCB” for applications that require these bushings without a counterbore.
Material
| Material | Heat Treat | Finish | DFARS | RoHS |
| 1144 Stressproof Steel | heat treated to achieve Rc 62-64 ID hardness | Yes | Yes |
Parts Specification
| Standard Drill Sizes (mm) | OD (Inch) | Length (Inch) | F Diameter (Inch) | G (Inch) |
| 5/16-17/32, O-Z, 7.90-13.50mm | 3/4 | 1-3/4 | 59/64 | 7/32 |
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