Description
Threaded Template Bushings-Countersunk Type (TTB)
An economical bushing designed for thin template jig plates from 3/64″ to 3/8″ thick. Bushings are held in place by a threaded Retainer Ring. Left-hand thread is self tightening during drilling to prevent the Retainer Ring from loosening. Flush contact of the Retainer Ring against the jig plate ensures perpendicular drill alignment. OD serrations prevent the bushing from rotating during drilling. Choose standard countersunk type for flush mounting, or flanged type for installation without countersinking the jig plate. Threaded Template Bushings can be easily removed to replace or reuse. Made in USA.
Application Information
Choose standard countersunk type for flush mounting, or flanged type for installation without countersinking the jig plate.
ID Tolerance
Standard ID Tolerance:
From #55 to 1/2″ +0.0001/+0.0015
Installation
Drill hole in jig plate to nominal bushing OD (B diameter). Countersink 100 to allow bushing to seat flush to 0.015″ below surface of plate. Install and tighten Retainer Ring to secure. To make Retainer Ring installation easier, offer a handy Socket-Type Installation Tool that fits 1/4″ square drives.
Material
| Item | Material | Heat Treat | Finish | DFARS | RoHS |
| Bushing | 1144 Stressproof steel | heat treated to achieve Rc 62-64 ID hardness | – | Yes | Yes |
| Retainer Ring | Aluminum | – | – | Yes | Yes |
Parts Specification
| Standard Drill Sizes (mm) | B OD (Inch) | C Length (Inch) | D Diameter (Inch) | E (Inch) | Template Thickness (Inch) |
| 13/64-5/16, #9-O, 5.00-8.00mm | 1/2″ | 1/2″ | 0.600″ | 1/2-20″ LH | 0.047-0.125 .126-0.188 .189-0.375″ |
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