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

2-flute Extended-reach Fish-tail (Square) Carbide End-mills (MM204) - 1/4 in. (0.250 in.) shank

Think & Tinker 2-flute 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
  • 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)

Extended reach is accomplished via the addition of a reduced diameter neck at the end of the flutes which allows very deep multi-pass contouring and pocketing. This capability is essential for cutting through thick materials from a single side. The inital application that drove the creation of these tools was the need to easily contour and shape the bodies and necks of solid-body electric guitars.

  • Geometry - 2 flute up-cut, 1/4 in. (6.35 mm) shank, fish-tail tip
  • Length - as indicated ±0.010 in.
  • Cut Diameter - nominal +0.0000 -0.0010 in.
  • Neck Diameter - 90% of cut diameter ±0.005 in.
  • Runout (TIR) - max 0.0002 in.
  • Max. depth of cut - nominal ±0.020 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 40k RPM
  • Fish tail point virtually eliminates backside breakout and splintering
  • High flute volume supports high feed rates / chip loads
  • High aspect ratio flutes for deep single-pass cutting
  • Reduced diameter neck for very deep multi-pass cutting

MADE IN USA
Carbide 2-flute necked deep reach end mills for sign carving

Diameter LOC Reach Flutes Coating Shank OAL Depth Rings Reviews Part Number Price
0.2500" (6.35mm) 1.000" (25.40mm) 1.75" (44.5mm) 2 1/4" 3.00" (76.2mm) Available MM204-2500-175FN

$39.17

0.2500" (6.35mm) 1.000" (25.40mm) 1.75" (44.5mm) 2 ZrN 1/4" 3.00" (76.2mm) Available MM204-2500-175FNC

$44.47

0.2500" (6.35mm) 1.400" (35.56mm) 3.25" (82.6mm) 2 1/4" 4.50" (114.3mm) Available MM204-2500-325FLN

$47.65