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2, 3-flute Carbide Tapered Ball-Nose Carving tools (CM204, CM304) - 1/4" (0.250 in.) Shank

Overview

Tapered ball-nose end-mills are the most commonly used cutters for deep CNC carving in wood, plastic and metal. Their tapered profiles make them much stronger than equivalent straight-wall tools while providing more flute volume for efficient swarf removal in deep, single-pass machining operations.

Of all the tapered ball-nose carving bits on the market, only PreciseBits cutters are:

  • 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)

Combining premium grade submicrograin tungsten-carbide, with guaranteed fidelity to industry leading specifications and our exclusive depth setting rings, produces tools uniquely designed for today's demanding CNC machining and CAD/CAM simulation environments. 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

Specifications

  • Geometry - 2-flute tapered high-shear edge grind, ball-nose tip, 1/4 in. (6.35 mm) shank
  • Length - 3.25in. (82.6mm) ±0.100 in.
  • Tip diameter - nominal ±0.0010 in.
  • Taper angle - nominal ±0.10°
  • Runout TIR) - max 0.0005 in.
  • Max. depth of cut - nominal ±0.100 in.
  • Anticipated Life - depends on material being cut
  • Material - solid submicrograin carbide
  • Operating RPM - CNC certified operation 1k RPM to 40k RPM

Benefits

  • High-shear ball-nose tip cuts smooth 3D contours with reduced stepping, and minimal fuzzing
  • High flute volume supports high feed rates / chip loads
  • High aspect ratio for single pass deep-reach cutting
  • Optimized flute geometry and low TIR insures clean cutting, virtually eliminating sanding and fuzz removal (when used with low TIR spindles).

Applications

  • Dimensional signage
  • Precision 3D carving
  • 3D contouring and profiling
  • Cabinetry and furniture making
  • 3D millwork

Application Data

  • Tool Type: Tapered Ball Nose
  • Shank Diameter = 0.250"
  • Half angle (side angle)
    • 0.0625in. (1/16in.) dia. tip: 5.7°
    • 0.1250in. (1/8in.) dia. tip: 2.5°
    • 0.2498in. (1/4in.) dia. tip: 0.004°
  • Tip radius
    • 0.0625in. (1/16in.) dia. tip: radius = 0.0313in.
    • 0.1250in. (1/8in.) dia. tip: radius = 0.0625in.
    • 0.2498in. (1/4in.) dia. tip: radius = 0.1249in.
  • Stepdown (pass depth, depth per pass)
    • recommended - 1X tip dia.
    • maximum - 2X tip dia.
  • Stepover:
    • finishing pass (stepover, cleanup pass) = 0.08 X tip diameter (8%)
    • roughing pass (clearance stepover) = 0.40 X tip diameter (40%)
  • Maximum Depth of Cut (DOC) = 1.50"
  • Spindle RPM (SPEED) = 5 KRPM to 60 KRPM (optimum speed)
  • Feedrate (IPM) = Depends on the material being cut. Do the Sweetspot Test before setting this parameter
  • Plunge rate = depends on speed (RPM)

Materials

  • High Density Urethane (HDU)
  • Softwood - pine, fir, WRC, poplar, red wood ...
  • Hardwood - walnut, redwood, maple, rosewoods ...
  • Plastic - ABS, PVC, HDP, MDP, LDP, celluloid, acrylic ...

Tutorials


MADE IN USA
Carbide 2-flute tapered carving tool for softwoods, hardwoods, HDU and signfoam
Product Compare (0)
Tip Diameter MaxDiameter LOC Reach Flutes Draft Angle Coating Shank OAL Depth Rings Reviews Part Number Price
0.0625" (1.59mm) 0.2500" (6.35mm) 1.50" (38.10mm) 2 3.6° 1/4" 3.00" (76.2mm) Available CM204-0625-150B

$34.93
0.0625" (1.59mm) 0.2500" (6.35mm) 1.50" (38.10mm) 2 3.6° ZrN 1/4" 3.00" (76.2mm) Available CM204-0625-150BC

$40.23
0.1250" (3.18mm) 0.2500" (6.35mm) 1.50" (38.10mm) 2 2.4° ZrN 1/4" 3.25" (82.6mm) Available CM204-1250-150BC

$40.23
0.1250" (3.18mm) 0.2500" (6.35mm) 1.50" (38.10mm) 3 2.5° 1/4" 3.00" (82.6mm) Available CM304-1250-150B

$39.64
0.1250" (3.18mm) 0.2500" (6.35mm) 1.50" (38.10mm) 3 2.5° ZrN 1/4" 3.00" (82.6mm) Available CM304-1250-150BC

$44.94
0.1260" (3.20mm) 0.2500" (6.35mm) 1.50" (38.10mm) 3 2.5° 1/4" 3.00" (82.6mm) Available CM304-1260-150B

$39.64
0.2498" (6.34mm) 0.2500" (6.35mm) 1.500" (35.56mm) 1.85" 2 0.001° 1/4" 3.00" (76.2mm) Available MM204-2500-185BN

$35.99
0.2498" (6.34mm) 0.2500" (6.35mm) 1.500" (35.56mm) 1.85" 2 0.001° ZrN 1/4" 3.00" (76.2mm) Available MM204-2500-185BNC

$41.29