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

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V-Groove Router Bits (EM2E4) - (1/4 in. shank, 2-flute, V-tip )

Engraving / Metal Cutting

Think & Tinker V-groove scoring and engraving cutters are built around a classic V-tip geometry enhanced with revisions to the cutting edges and flute profile. These changes result in bits with improved cutting properties in a wider range of materials. Our tools are routinely used to shape and engrave metals, plastics, all types of woods and a wide variety of composites.

Manufactured in the USA, every tool is:

  • 100% measured / optically inspected to insure that EVERY tool meets, or exceeds, our published specifications
  • available with depth rings precisely positioned to ±0.0015 in. (0.038mm), virtually eliminating the need for resetting Z-axis zero between tool changes (with bits of same overall length)
  • made from premium grade submicrograin tungsten carbide (HRa 92, HRc 80)

This attention to detail and the use of top quality materials result in tools with dependable cutting characteristics and one of the longest tool lives in the market. Combined with comprehensive customer support, our cutters have become the tools of choice for sign makers, model makers, artists and instrument builders around the world.

  • Geometry - 2-flute, V-tip point
  • Tip diameter - 0.0150 in. ±0.001 in.
  • Tip angle - nominal ± 0.5°
  • Shank dia. - 0.250 in. (6.35 mm) +0.00, -0.0002 in.
  • Max. cutting diameter - 0.248 in.
  • Max. depth of cut - DOC (penetration) varies by tip angle
    • 30° - 0.439 in. (11.1mm)
    • 45° - 0.284 in. (7.2mm)
    • 60° - 0.204 in. (5.2mm)
    • 90° - 0.118 in. (3.0mm)
  • Runout (TIR) - 0.0002 in. max
  • Anticipated Life - 4,000 to 8,000 linear inches (hardwood, CNC milling)
  • Material - solid sub-micrograin carbide
  • Operating RPM - CNC certified operation 4k RPM to 40k RPM
  • Side-lit plastic signs - Tip sharpness and dimensional fidelity insure that engravings into transparent and translucent thermoplastics cut clean, with out the debris that plague many other v-tip tools. This is especially critical in very fine (0.20 in. high) text and complex line art.
  • Wooden signs and complex contours - Holding a tight tolerance on the V-tip side angle allows these tools to be used in multi-pass, deep engraving of text and dimensional signage.
  • Plaques and awards - Multi-material compatibility insures that no tool change is required when cutting from brass into wood into thermoplastic into most other materials you are using for your awards. Clear, crisp engraving insures a professional product every time.
  • Custom edging and chamfering - Pre-chamfering of complex shapes (like monograms) eliminates the need for time consuming, and variable hand sanding. The ability to create curved and wavy edge profiles provides a more finished look to all of your cutting and contouring projects.
  • Tool Type: Engraving (or Flat-tip Engraving)
  • Diameter (D) = 0.2500 in.
  • Side Angle (A, half or draft-angle)
    • 30V: A = 15°
    • 45V: A = 22.5°
    • 60V: A = 30°
    • 90V: A = 45°
  • Flat Diameter (F)
    • 30°: F = 0.015 in.
    • 45°: F = 0.015 in.
    • 60°: F = 0.015 in.
    • 90°: F = 0.015 in.
  • Stepdown = Depth per Pass, Pass Depth:
    • Plastic - 0.118 in. (3.0mm)
    • G-10 / FR-4 - 0.040 in. (1.0mm)
    • Hardwood - 0.118 in. (3.0mm)
    • Softwood - 0.250 in. (6.4mm)
    • MDF - 0.188 in. (3.0mm)
  • Depth of Cut (DOC):
    • 30° - 0.439 in. (11.1mm)
    • 45° - 0.284 in. (7.2mm)
    • 60° - 0.204 in. (5.2mm)
    • 90° - 0.118 in. (3.0mm)
  • Stepover (for final cleanup pass) = 0.006 in. (0.15mm)
  • Stepover (for roughing, clearance pass) = 0.010 in. (0.25mm)
  • Spindle RPM (SPEED) = 5 KRPM to 40 KRPM
  • Feedrate (IPM) = Depends on the material being cut. Do the Sweetspot Test before setting this parameter (Sweetspot Test).
  • Plunge rate = 40 IPM to 250 IPM (again depending on material being cut)
  • High Density Urethane (HDU)
  • Hardwood - walnut, redwood, maple, rosewood, ebony, epe ...
  • Plastic - PVC, HDP, MDP, acrylic, polycarbonate ...
  • Metal - zinc, aluminum, copper, brass, bronze, silver, gold...
V tip scoring, engraving and carving tool tip
MADE IN USA
Carbide 2-flute V tip scoring, engraving and carving tool
Product Compare (0)
Tip Diameter MaxDiameter LOC Flutes Angle Coating Shank OAL Depth Rings Reviews Part Number Price
0.0150" (0.38mm) 0.2500" 0.439" (11.14mm) 2 30° 0.2500" (6.35mm) 2.50" (63.5mm) Available EM2E4-2500-30V

$19.56
0.0150" (0.38mm) 0.2500" 0.439" (11.14mm) 2 30° ZrN 0.2500" (6.35mm) 2.50" (63.5mm) Available EM2E4-2500-30VC

$24.86
0.0150" (0.38mm) 0.2500" 0.284" (7.21mm) 2 45° 0.2500" (6.35mm) 2.50" (63.5mm) Available EM2E4-2500-45V

$19.56
0.0150" (0.38mm) 0.2500" 0.284" (7.21mm) 2 45° ZrN 0.2500" (6.35mm) 2.50" (63.5mm) Available EM2E4-2500-45VC

$24.86
0.0150" (0.38mm) 0.2500" 0.204" (5.17mm) 2 60° 0.2500" (6.35mm) 2.50" (63.5mm) Available EM2E4-2500-60V

$19.56
0.0150" (0.38mm) 0.2500" 0.204" (5.17mm) 2 60° ZrN 0.2500" (6.35mm) 2.50" (63.5mm) Available EM2E4-2500-60VC

$24.86
0.0150" (0.38mm) 0.2500" 0.118" (2.98mm) 2 90° 0.2500" (6.35mm) 2.50" (63.5mm) Available EM2E4-2500-90V

$19.56
0.0150" (0.38mm) 0.2500" 0.118" (2.98mm) 2 90° ZrN 0.2500" (6.35mm) 2.50" (63.5mm) Available EM2E4-2500-90VC

$24.86