120 Degree V Bit 1/4″ Shank for CNC Routers, Super-Shear [Big Stiffy Series]

(2 customer reviews)


The 120 degree v bit ‘Super Shear’ for CNC routers is the bit when speed matters as much as the carving quality. This 90 degree bit is part of the Big Stiffy series, a set of bits designed to virtually eliminate uneven carves due to chatter. See full description for more info.

  • Shank: 1/4″ / Length: 2″ / Flutes: 2 / Flute length: 0.5″ / Cut Dia. 3/4″
  • Cut angle 120 degree / 100% carbide
  • Made in the USA

Out of stock


The Big Stiffy series 120-degree v-bit for CNC routers is the bit to use when you want wider, shallower cuts, and get 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 120° Super-Shear bit is, watch this YouTube video of an amazing lion completely carved in 11 minutes!

Why is it called the Big Stiffy? Overall, the bit length is a bit shorter than most. This little design modification keeps you 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 120-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: 1.0″ (25mm)
  • Length: 2.0″ (38mm)
  • Flutes: 2
  • Flute length: 0.375″
  • Material: 100% tungsten-carbide tipped


  • Feed: 45 inches per minute (16mm/sec)
  • Speed (rpm): 10000-14000
  • Max pass depth: 0.25″ / 3.175mm
  • Stepover: 20%
  • For CNC routers, see this speeds & feeds table

FREE Feeds & Speeds table PDF. Download by clicking here


Additional information

Weight 1.5 oz
Dimensions 9 × 7 × .5 in

2 reviews for 120 Degree V Bit 1/4″ Shank for CNC Routers, Super-Shear [Big Stiffy Series]

  1. Harry Snider

    Used the 120 Degree V Bit 1/4 today and really carved nice. Letters were amazing. Wasn’t sure out of the box, appears small for that kind of bit but man it cut beautifully. Great design Garrett

    • garfro3_2skglm

      Hi Harry. Thank you for the feedback. It looks a little small, but you are right, it cuts clean!

  2. Kate

    This bit is well built and you can feel the quality compared to others. I was extremely impressed with how well it cut and how fast it can move through pine, cedar and MDF. I haven’t used it on other woods but I know it will preform well. I have lots of Garrett’s other bits and they all out preform others I’ve used. If you need a 120 v-bit, this is it.

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