The Big Stiffy series 60-degree v-bit for CNC routers is the bit to use when you want your job done fast and clean. With a 1/4″ shank, it is the go-to v carving bit for home-based CNC’ers when it comes to larger projects. The ‘super-shear’ blade design is designed to leave exceptionally clean cuts at higher feeds rates. This is the v bit to use when your v-carved letters are wider than 1/4″ wide.
To see how effective your 90° Super-Shear bit is, watch this YouTube video of an amazing lion completely carved in 11 minutes using the same size 20 degree V bit!
Why is it called the Big Stiffy? Overall, the bit length is a bit shorter than most. This little design modification keeps your bit stiffer during cuts, which gives you a 50% improvement in your surface finish. In other words, the potential for chatter is virtually eliminated. When 60-degree v bits are longer, they tend to cause ‘chatter’ (a rough surface finish caused by tool vibration and deflection)
This bit has a carbide blade brazed to a 4140 body.
- Shank: 1/4″ (6.35mm)
- Cut diameter: 0.75″ (25mm)
- Cut angle: 60 degrees
- Length: 2.0″ (52mm)
- Flutes: 2
- Flute length: 065″
- Material: 100% tungsten-carbide tipped
- Feed: 80 inches per minute (16mm/sec)
- Speed (rpm): 10000-14000
- Max pass depth: 0.5″ / 6mm
- Stepover: 20%
- For CNC routers, see this speeds & feeds table
FREE Feeds & Speeds table PDF. Download by clicking here