Roughing Step Drill for SAE J1926 Port Sizes
The Roughing Step Drill for SAE J1926 is a high-performance solid carbide tool designed to prepare the hole for reamer-style port tools by roughing the minor-thread and sealing diameters. With a 140° self-centering point and coolant-through design, it delivers precise, repeatable results and efficient chip evacuation. Finished with a durable AlTiN+ coating, this drill offers extended tool life and thermal stability—making it a dependable first step in the SAE J1926 porting process.
| SAE Size | S (Shank Diameter) | OAL | D1 | D2 | L1 | L2 | FL (Flute Length) | SL (Shank Length) | AlTiN+ Tool # | EDP # |
|---|---|---|---|---|---|---|---|---|---|---|
| 2 | 8 mm | 79 mm | 0.255 | 0.315 | 0.370 | 0.37 | 1.25 | 1.95 | RD-SAE-02A | 407024 |
| 3 | 10 mm | 89 mm | 0.317 | 0.378 | 0.370 | 0.37 | 1.32 | 2.19 | RD-SAE-03A | 407026 |
| 4 | 12 mm | 102 mm | 0.372 | 0.431 | 0.427 | 0.42 | 1.50 | 2.51 | RD-SAE-04A | 407028 |
| 5 | 14 mm | 107 mm | 0.434 | 0.494 | 0.427 | 0.42 | 1.66 | 2.55 | RD-SAE-05A | 407030 |
| 6 | 14 mm | 107 mm | 0.491 | 0.551 | 0.482 | 0.48 | 1.86 | 2.35 | RD-SAE-06A | 407032 |
| 8 | 20 mm | 108 mm | 0.672 | 0.739 | 0.557 | 0.55 | 2.04 | 2.21 | RD-SAE-08A | 407034 |