PreciseBits EM2E4 VGroove Bit

Overview

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 from premium sub-micrograin tungsten carbide, every tool is subjected to our rigorous measurement / optical inspection protocols to ensure that every edge is as sharp as it can be, every angle is held to ±0.50° and every tip flat is precise to ±0.001" (0.0025mm). Industry-leading TIR (run-out) <0.0002 in. (0.005mm) helps to ensure sharp edges and crisp engravings.

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" point
• Tip diameter - 0.0150" ±0.0001"
• Tip angle: nominal ± 0.5°
• Shank dia: 0.250". (6.35 mm) +0.00, -0.0002"
• Max. cutting diameter - 0.248"
• Max.DOC: EFL varies by tip angle
  • 30° - 0.467" (11.9mm)
  • 45° - 0.384" (9.75mm)
  • 60° - 0.217" (5.5mm)
  • 90° - 0.125" (3.2mm)
• Runout (TIR) - 0.0002". 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

Applications

Side-lit plastic signs - Tip sharpness and dimensional fidelity ensure that engravings into transparent and translucent thermoplastics cut clean, without 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 ensures 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 ensures 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.

Application Data

• Tool Type: V-Bit
• Diameter (D) = 0.2500"
• Included Angle (A, total angle): 30°, 60°, 90°
• Stepdown = Depth per Pass, Pass Depth:
  • Plastic - 0.125" (1.0mm)
  • G-10 / FR-4 - 0.040". (1.0mm)
  • Hardwood - 0.188" (3.0mm)
  • Softwood - 0.250" (3.18mm)
  • MDF - 0.188" (3.15mm)
• Depth of Cut (DOC):
  • 30° - 0.467" (11.9mm)
  • 60° - 0.217". (5.5mm)
  • 90° - 0.125". (3.2mm)
• Stepover (for final cleanup pass) = 0.010" (0.13mm)
• Stepover (for roughing, clearance pass) = 0.015" (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
  (go to: http://www.precisebits.com/tutorials/calibrating_feeds_n_speeds.htm).
• Plunge rate = 40 IPM to 25 IPM (again depending on material being cut)

Bit sizes