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

3-Flute High Aspect-ratio Fish-tail End-mills (MM308) - 1/8" (0.1250" shank)

Think & Tinker 3-flute 1/8 inch shank fish-tail (square tip) deep-reach end-mills feature an aggressive plunging tip geometry enhanced with high-rake cutting edges and closed-form flute profile. The 3-flute design result in more rigid bits with improved chatter resistance and surface finishes when deep cutting in a wider range of materials. Deep-reach geometries feature flute lengths (depth of cut) greater than 6X the diameter of the tool.

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.

MADE IN USA

  • Geometry - 3 flute, 1/8 in. (6.35 mm) shank, fish-tail tip
  • Overall Length (OAL)- as shown. ±0.010 in.
  • Aspect ratio - min. 6:1
  • Diameter -
    • 0.0000 in. to 0.0625 in. = nominal ±0.0005 in.
    • 0.0630 in. to 0.1181 in. = nominal ±0.0010 in.
    • 0.1250 in. = 0.1248 in. +0.0000 in., -0.0020 in.
  • Runout
    • OAL = 1.50in: TIRmax < 0.0005 in.
    • OAL = 2.50in: TIRmax < 0.0010 in.
    • OAL = 3.00in: TIRmax < 0.0015 in.
  • Max. depth of cut - nominal ±0.005 in.
  • Anticipated Life - depends on material being cut (min 20,000 in, blue or green jeweler's wax)
  • Material - solid submicrograin carbide
  • Operating RPM - CNC certified operation 1k RPM to 60k RPM
Carbide 3-flute fishtail deepreach end mill

Diameter LOC Reach Flutes Coating Shank OAL Depth Rings Reviews Part Number Price
0.0625" (1.59mm) 0.31" (7.87mm) 0.75" (19.1mm) 3 1/8" 1.50" (38.1mm) Not Available MM308-0625-075FN

$26.44

0.1250" (3.18mm) 1.00 (25.4mm) 2.0" (51mm) 3 1/8" 3.00" (76.2mm) Not Available MM308-1250-200FN

$42.35

0.1250" (3.18mm) 1.00 (25.4mm) 2.0" (51mm) 3 ZrN 1/8" 3.00" (76.2mm) Not Available MM308-1250-200FNC

$46.59

0.0220" (0.56mm) 0.09" (2.29mm) 0.26" (6.6mm) 3 1/8" 1.50" (38.1mm) Available MM3I8-0220-026FN

$25.70

0.0230" (0.58mm) 0.09" (2.29mm) 0.26" (6.6mm) 3 1/8" 1.50" (38.1mm) Available MM3I8-0230-026FN

$25.70