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

Tapered Ball-Nose Carving tools (CM408) - 1/8 in. (0.1250 in.) Shank

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

  • Geometry - 4 flute, tapered high-shear flutes, ball-nose tip, 1/8 in. (3.18 mm) shank
  • Length - 1.75in. (44.45mm) ±0.010in.
  • Tip diameter - nominal ±0.0005 in.
  • Taper angle - nominal ±0.10°
  • Runout (TIR) - max 0.0002 in.
  • Max. depth of cut - nominal ±0.100 in.
  • Depth ring position - 1.050 in. (26.67mm) ±0.0015 in (0.038mm)
  • Anticipated Life - depends on material being cut
  • Material - solid submicrograin carbide
  • Operating RPM - CNC certified operation 1k RPM to 40k RPM
  • Dimensional signage
  • Precision 3D carving
  • 3D contouring and profiling
  • Cabinetry and furniture making
  • 3D millwork
  • Compatible with CarveWright and CompuCarve woodworking systems.
  • Tool Type: Tapered Ball Nose
  • Shank Diameter = 0.125"
  • Half angle (side angle)
    • 0.0625in. (1/16in.) dia. tip: 3.8°
  • Tip radius
    • 0.0625in. (1/16in.) dia. tip: radius = 0.0313in.
  • 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) = 0.500"
  • 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
    (go to: http://www.precisebits.com/tutorials/calibrating_feeds_n_speeds.htm).
  • Plunge rate = depends on speed (RPM)
  • High Density Urethane (HDU)
  • Hardwood - walnut, redwood, maple, rosewood, ebony, epe ...
  • Plastic - PVC, HDP, MDP, acrylic, polycarbonate ...

MADE IN USA
Carbide Tapered-stub carving and engraving tools for softwoods, hardwoods and plastics

Tip Diameter MaxDiameter LOC Flutes Draft Angle Shank OAL Depth Rings Reviews Part Number Price
0.0625" (1.59mm) 0.1250" (3.18mm) 0.500" 4 3.8° 1/8" 1.75" (44.5mm) 1.050" Only CM408-0625-050B

$15.95