HSS Center Drills Plain Type
Plain Type HSS Center Drills are designed to produce accurate center holes in components which require machining between centers.
All Center Drills are Fully Ground, Spiral Flute, right hand, 60degree included angle.
Left hand, 82degree & 90degree included angle are available on request.
HSS-Co Center Drills are available on request.
Titanium Coated are available on request.
Center Drills Set are available on request.
| Metric Size: ( DIN333 Type A, Plain Type ) |
| Drill Dia. | Body Dia. | Flute Length | Overall Length |
| 1.0mm | 3.15 | 1.9 | 31.5 |
| 1.25mm | 3.15 | 2.2 | 31.5 |
| 1.6mm | 4 | 2.8 | 35.5 |
| 2.0mm | 5 | 3.3 | 40 |
| 2.5mm | 6.3 | 4.1 | 45 |
| 3.15mm | 8 | 4.9 | 50 |
| 4.0mm | 10 | 6.2 | 56 |
| 5.0mm | 12.5 | 7.5 | 63 |
| 6.3mm | 16 | 9.2 | 71 |
| 8.0mm | 20 | 11.5 | 80 |
| 10.0mm | 25 | 14.2 | 100 |
| Inch Size: ( Plain Type ) |
| Size # | Drill Dia. | Body Dia. | Flute Length | Overall Length |
| 1# | 3/64" | 1/8" | 3/64" | 1-1/4" |
| 2# | 5/64" | 3/16" | 5/64" | 1-7/8" |
| 3# | 7/64" | 1/4" | 7/64" | 2" |
| 4# | 1/8" | 5/16" | 1/8" | 2-1/8" |
| 4-1/2# | 9/64" | 3/8" | 9/64" | 2-1/2" |
| 5# | 3/16" | 7/16" | 3/16" | 2-3/4" |
| 6# | 7/32" | 1/2" | 7/32" | 3" |
| 7# | 1/4" | 5/8" | 1/4" | 3-1/4" |
| 8# | 5/16" | 3/4" | 5/16" | 3-1/2" |
| 9# | 11/32" | 7/8" | 11/32" | 3-5/8" |
| 10# | 3/8" | 1" | 3/8" | 3-3/4" |
