Maximize Productivity with Combination Tools

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.

3N1 Drill operation
Drill

Creates pilot hole

3N1 Countersink operation
Countersink

Forms chamfer

3N1 Chamfer operation
Chamfer

Deburrs edges

3N1 Drill Point Countersinks - Three Operations in One
Benefits
  • Reduced cycle time
  • Fewer tool changes
  • Consistent results
  • Lower tooling cost
  • Quick-change options

3N1 Standard Countersinks - 82°

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

Quick-Change 3N1 System

3N1 Quick-Change with Long Shank

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.

Quick-Change Holders

Universal holders accept all 3N1 QC inserts.

DescriptionShankEDP
QC Holder Small1/4"03250
QC Holder Medium3/8"03251
QC Holder Large1/2"03252
QC Inserts

Replacement countersink inserts for quick-change holders.

Body Dia.DrillEDP
1/4"#2903260
5/16"#2503261
3/8"#703262
1/2"I03263

Stop-Countersinks

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

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Resharpen your 3N1 tools to like-new condition.

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