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CTR™ • Counterbore
CTR™ • Counterbore
CTR™ • Counterbore
CTR™ • Counterbore
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S2S Whistle Notch WN Shank • Metric

CTR™ • Counterbore

SAP Material Number 1246168
ISO Catalog Number CBTF420R2WD32N3M
ANSI Catalog Number CBTF420R2WD32N3M
[D1] Drill Diameter M 42.195 mm
[D1] Drill Diameter M 1.661 in
Drill Diameter Tol. Min -0.12 mm
Drill Diameter Tol. Min -0.004 in
Drill Diameter Tol. Max 0.12 mm
Drill Diameter Tol. Max .0047 in
[D] Adapter / Shank / Bore Diameter 32 mm
[D] Adapter / Shank / Bore Diameter 1.259 in
Pre Machined Hole Diameter [D6] 22 mm
Pre Machined Hole Diameter [D6] .8661 in
[L] Overall Length 126 mm
[L] Overall Length 4.96 in
[L2] Head Length 66 mm
[L2] Head Length 2.598 in
[L4] Maximum Drilling Depth 33.5 mm
[L4] Maximum Drilling Depth 1.318 in
Gage Insert SPHX120404R.
Number of Insert Cutting Diameter 1 3
See all Product Variants

Uses and application

  • Counter BoringCounter Boring
  • Shank - Cylindrical Whistle Notch™Shank - Cylindrical Whistle Notch™
  • Coolant - Through CoolantCoolant - Through Coolant
  • Flute Configuration: 2Flute Configuration: 2
  • Flute Configuration: 3Flute Configuration: 3

Workpiece Materials

P Steel
M Stainless Steel
K Cast Iron
N Non-Ferrous
S High-Temp Alloys
H Hardened Materials

Features and benefits

  • CTR Counterboring Tools are designed for high-production screw head counterbores and similar counterboring operations.

  • Extremely unequal insert positioning and flutes.

  • S2 S inserts reduce additional drill operations to achieve a precise 90° bottom.

  • Counterboring tool shipped with insert screws and Torx wrench.

Machine Side


Workpiece Side


Spare Parts for S2S Whistle Notch WN Shank • Metric

Spare Part
    INSERT SCR M4-0.7 x 10 T15 INSERT SCR M4-0.7 x 10 T15
    INSERT SCR M4-0.7 x 10 T15
    Spare Part
      TORX-WRENCH TX15 170.025 TORX-WRENCH TX15 170.025
      TORX-WRENCH TX15 170.025
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