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

2-flute Extended-reach Corner-radius Carbide End-mills (MM202) - 1/2" Shank

Corner-radius (bull-nose) end-mills are designed to produce smooth, artifact-free surfaces in the bottoms of slots and pockets at much higher chiploads than either fish-tail (square) or ball-nose cutters.

Extended-reach end-mills feature a reduced diameter neck that starts where the flutes end. This allows the bit to be used in multi-pass machining operations to penetrate much deeper than the length of the flutes. Necking the tool in this fashion enhances the rigidity of the cutter, reducing deflection and chatter under heavy chiploads.

Think & Tinker 2-flute 1/4 in. and 1/2 in. shank end-mills feature an off-center plunging tip style 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
  • 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, 1/2 in. (12.70 mm) shank, corner-radius tip
  • Length - 4 in. (101.6mm) ±0.010 in.
  • Diameter - nominal +0.0000 -0.0010 in.
  • Corner radius - nominal ±0.0010 in.
  • Runout (TIR) - max 0.0005 in.
  • Max. depth of cut - nominal ±0.005 in.
  • Anticipated Life - depends on material being cut (min 10,000 in, western red cedar)
  • Material - solid submicrograin carbide
  • Operating RPM - CNC certified operation 1k RPM to 24k RPM
  • Bull-nose (corner-radius) tip cuts smooth 3D contours at higher chiploads than ball-nose cutters
  • Specifically designed for "Rest Machining" cutting strategies (see Tutorials)
  • High flute volume supports high feed rates / chip loads
  • High aspect ratio for single pass deep-reach cutting
  • Extended-reach (necked) geometry supports deep multi-pass cutting with minimum deflection and chatter.
  • Dimensional signage
  • Large scale 3D carving
  • 3D contouring and profiling
  • Cabinetry and furniture making
  • 3D millwork
1/2in. 2-flute bull-nose tip
Carbide 2-flute extended-reach corner-radius end mill for deep relief sign carving

Diameter LOC Reach Flutes Corner Radius Coating Shank OAL Depth Rings Reviews Part Number Price
0.5000" (12.7mm) 1.25" (31.75mm) 2.75" (69.85mm) 2 0.060" (1.52mm) 1/2" 4.00" (101.6mm) Not Available MM202-5000-275FRN


0.5000" (12.7mm) 1.25" (31.75mm) 2.75" (69.85mm) 2 0.060" (1.52mm) ZrN 1/2" 4.00" (101.6mm) Not Available MM202-5000-275FRNC