Three Operations in One Tool - Drill, Countersink, Chamfer
3N1 countersinks combine drilling, countersinking, and chamfering into a single operation, reducing cycle time and tool changes.
The 3N1 design features a precision drill point that creates the pilot hole while the countersink body follows to create the chamfer - all in one pass. This eliminates the need for separate drilling and countersinking operations.
Creates pilot hole
Forms chamfer
Deburrs edges
Combination drill-countersink for flat-head fastener applications.
| Body Dia. | Drill Size | For Screw | Shank | OAL | HSS EDP |
|---|---|---|---|---|---|
| 1/4" | #31 | #6 | 1/4" | 2" | 03200 |
| 1/4" | #29 | #8 | 1/4" | 2" | 03201 |
| 5/16" | #25 | #10 | 1/4" | 2-1/4" | 03202 |
| 3/8" | #7 | 1/4" | 1/4" | 2-1/2" | 03203 |
| 7/16" | F | 5/16" | 3/8" | 2-3/4" | 03204 |
| 1/2" | I | 3/8" | 3/8" | 3" | 03205 |
| 5/8" | Q | 1/2" | 1/2" | 3-1/4" | 03206 |
Interchangeable drill points with universal holder for fast tool changes without removing the holder from the spindle. The Quick-Change system dramatically reduces downtime and improves productivity in high-volume operations.
Universal holders accept all 3N1 QC inserts.
| Description | Shank | EDP |
|---|---|---|
| QC Holder Small | 1/4" | 03250 |
| QC Holder Medium | 3/8" | 03251 |
| QC Holder Large | 1/2" | 03252 |
Replacement countersink inserts for quick-change holders.
| Body Dia. | Drill | EDP |
|---|---|---|
| 1/4" | #29 | 03260 |
| 5/16" | #25 | 03261 |
| 3/8" | #7 | 03262 |
| 1/2" | I | 03263 |
Countersinks with adjustable depth stop for consistent countersink depth. Ideal for production applications requiring precise control.
| Body Dia. | Angle | Stop Range | Tool Name | HSS EDP |
|---|---|---|---|---|
| 1/4" | 82° | 0-.200" | SC-250-82 | 03280 |
| 3/8" | 82° | 0-.300" | SC-375-82 | 03281 |
| 1/2" | 82° | 0-.400" | SC-500-82 | 03282 |
| 3/4" | 82° | 0-.500" | SC-750-82 | 03283 |
| 1" | 82° | 0-.600" | SC-1000-82 | 03284 |