Aircraft Extension Drill Bit Size Chart
This chart provides detailed drill bit sizes for aircraft extension drills, conforming to ASME B94.11M-12 standards. It specifies fractional drill sizes, decimal equivalents, flute lengths, and overall lengths.
Technical Specifications
Overview
Aircraft Extension Drill Bit Standards
This reference chart provides comprehensive dimensional data for aircraft extension drill bits, strictly adhering to the ASME B 94.11M-12 standard. It serves as an essential guide for machinists and procurement professionals to quickly identify fractional drill sizes, their decimal equivalents, and associated flute lengths. Designed for precision, this chart ensures consistency across all listed sizes, which feature a uniform 12-inch overall length.
Technical Specifications
- Standard Compliance
- ASME B 94.11M-12
- Overall Length
- 12 inch
- Size Range
- 1/16 inch to 1/2 inch
- Split Point Availability
- Available from 1/8 inch and above
Dimensional Data
Drill Bit Dimensions
| Fractional Size | Decimal Equivalent | Flute Length (in) |
|---|---|---|
| 1/16 | 0.063 | 7/8 |
| 1/8 | 0.125 | 1-5/8 |
| 1/4 | 0.25 | 2-3/4 |
| 3/8 | 0.438 | 4-1/16 |
| 1/2 | 0.5 | 4-1/2 |
