CNC router bits and carbide cutting tools with tutorials and technical guides

PreciseBIT 4-flute Scoring / Engraving Countersinks

  • Geometry - 4 flute, 1/4 in. (6.35mm) dia. 1/8 in. (3.18 mm) shank, "V" point
  • Length - indicated ±0.010 in.
  • Tip angle - nominal ± 0.5°
  • Max. depth of cut - DOC (penetration) varies by tip angle:
    • 60° - 0.217 in. (5.5mm)
    • 82° - 0.144 in. (3.7mm)
    • 90° - 0.125 in. (3.2mm)
    • 100° - 0.105 in. (2.7mm)
    • 120° - 0.072 in. (1.8mm)
  • Shank dia. - 0.1250 in. (3.18 mm) +0.00, -0.0002 in.
  • Runout (TIR) - 0.0002 in. max
  • Max. depth of cut - EFL varies by tip angle
  • Anticipated Life - 6,000 linear inches (phenolic, CNC milling)
  • Material - solid submicrograin carbide
  • Ring Set - 0.800 in. ± 0.002 in. (optional)
  • Operating RPM - CNC certified operation 20k RPM to 100k RPM
Carbide 4-flute countersink for PCB, copperclad, phenolics, wood, plastics, composites and non-ferrous metals

DescriptionReviews Part Number Price
60° Scoring / Engraving 4-flute Countersink 1.50in. (38mm) OAL EM4E8-2500-060V

$28.89

82° Scoring / Engraving 4-flute Countersink 1.50in. (38mm) OAL EM4E8-2500-082V

$28.89

90° Scoring / Engraving 4-flute Countersink 1.50in. (38mm) OAL EM4E8-2500-090V

$28.89

100° Scoring / Engraving 4-flute Countersink 1.50in. (38mm) OAL EM4E8-2500-100V

$28.89

120° Scoring / Engraving 4-flute Countersink 1.50in. (38mm) OAL EM4E8-2500-120V

$28.89