PreciseBits EM2E8 V-Bit Engraving/Scoring

Overview

- A great choice for engraving, and PCB milling

These PreciseBits brand 'V-tip bits feature a two flute spiral geometry for efficient debris removal while the cutting edge geometry virtually eliminates chatter at high feed rates. The 60° & 90° tips are optimized for engraving non-ferrous metals, hardwoods, phenolics, stabilized woods and composite minerals. Available with a proprietary ZrN coating extends bit life and improves cut quality.

• Geometry: 2 flute, "V" point
• Tip diameter - 0.0050" ±0.0002"
• Length - indicated ±0.010" (30° 1.50 in. ±0.010")
• Tip angle: nominal ± 0.5°
• Max. depth of cut - DOC (penetration) varies by tip angle
  • 30° - 0.177" (4.5mm)
  • 40° - 0.070" (1.8mm)
  • 45° - 0.075" (1.9mm)
  • 60° - 0.054" (1.4mm)
  • 90° - 0.031" (0.8mm)
• Max runout (TIR) - < 0.0005"
• Shank dia: 0.1250". (3.18 mm) +0.00, -0.0002"
• Anticipated Life: 3,000 linear inches fiberglass, CNC milling)
• Material: solid sub-micrograin carbide
• Operating RPM: CNC certified operation 20k RPM to 100k RPM

Applications

• Printed circuit trace isolation
• Engraving plaques, awards, medallions, and labels
• Custom jewelry fabrication and marking

Application Data

• Tool Type: Engraving (or Flat-tip Engraving)
• Diameter
  • 30V: (D) = 0.1250"
  • 45V: (D) = 0.0625"
  • 60V: (D) = 0.0625"
  • 90V: (D) = 0.0625"
• Side Angle (A, half or draft-angle)
  • 30V: A = 15°
  • 45V: A = 22.5°
  • 60V: A = 30°
  • 9090V: A = 45°
• Flat diameter
  • 30V: F = 0.005"
  • 45V: F = 0.005"
  • 60V: F = 0.005"
  • 90V: F = 0.005"
• Stepdown = Depth per Pass, Pass Depth:
  • Plastic - 0.015" (0.38mm)
  • G-10 / FR-4 - 0.010" (0.25mm)
  • Aluminum - 0.005" (0.13mm)
  • Hardwood - 0.020" (0.51mm)
  • Softwood - 0.030" (0.76mm)
• Depth of Cut (DOC):
  • 30° - 0.177" (4.48mm)
  • 45° - 0.075" (1.92mm)
  • 60° - 0.054" (1.38mm)
  • 90° - 0.031" (0.8mm)
• Stepover (for final cleanup pass) = 0.002" (0.13mm)
• Stepover (for roughing, clearance pass) = 0.005" (0.25mm)
• Spindle RPM (SPEED) = 5 KRPM to 60 KRPM
• Feedrate (IPM) = Depends on the material being cut. Do the Sweetspot Test before setting this parameter
  (go to: http://w.precisebits.com/tutorials/calibrating_feeds_n_speeds.htm).
• PlPlunge rate = 5 IPM to 25 IPM (again depending on material being cut)

Bit sizes