Genmitsu MC40A — Flat Upcut 2-Flute (Nano Blue)
Genmitsu
Overview
2-flute upcut spiral end mill with TiAlN nano blue coating. Shank: 1/8in (3.175mm). Cutting dia: 1/8in. Flutes: 2 upcut. Max RPM: 30,000. TiAlN coating reduces heat buildup and extends bit life on hardwoods.
Properties
Difficulty
beginner
Pros
- Inexpensive — 40pc set for ~$20
- Nano blue coating reduces friction and heat
- Good for wood, MDF, plywood, and soft plastics
- Easy to replace — buy in bulk
- Upcut pulls chips out of the cut
Cons
- 1/8" shank limits rigidity vs 1/4"
- Not for hardwood at aggressive feeds
- Not suitable for aluminum
- Upcut can cause tearout on top surface
Best For
- Hardwood (oak
- maple
- walnut)
- softwood
- MDF
- plywood through-cuts and pocketing
- best chip evacuation
Avoid For
- Acrylic and plastics (use O-flute)
- veneered surfaces needing clean top face (use downcut)
- metals without cutting fluid
Storage
Keep in dry storage — moisture causes micro-corrosion on carbide edges.
Brands
Genmitsu (SainSmart)