1″ Ball Nose Rounding Bit 1/2″ Radius Cut, 1/4″ Shank for CNC Routers, Super-Shear (Big Stiffy Series) [1BN]

$39.50

Affectionately named “Big Balls” by other CNC’ers, the Big Stiffy series 1/2″ radius ball nose bit is for bigger radius accent work when you want your job done fast and clean. With a 1/4″ shank, it is suited well for home CNC routers. Excellent to remove large amounts of material in a single pass. The ‘super-shear’ blade design is designed to leave exceptionally clean cuts at higher feeds rates.

  • Shank: 1/4″ / Length: 2″ / Flutes: 2 / Flute length: 0.75″ / Cut Dia. 1″ Radius 0.5″
  • Cut radius 1/2″ / 100% carbide

Out of stock

Description

This Big Stiffy series 1/2″ radius ball nose bit (1″ inch diameter) for CNC routers is for bigger radius accent work when you want your job done fast and clean. With a 1/4″ shank, it is suited well to remove large amounts of material in a single pass. The ‘super-shear’ blade design is designed to leave exceptionally clean cuts at higher feeds rates.

Why is it called the Big┬áStiffy? 2 reasons. The first is, this bit has extra mass, which absorbs vibration you’ll find in other large CNC bits. The second reason is, the overall bit length is shorter than the standard bit. 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.

This bit has a carbide blade brazed to a 4140 body.

Specs

  • Shank: 1/4″ (6.35mm)
  • Radius: 0.5″ (12.7mm)
  • Cut diameter: 1.0″ (25mm)
  • Length: 2.0″ (52mm)
  • Flutes: 2
  • Flute length: 0.75″ (19mm)
  • Material: 100% tungsten-carbide tipped

Settings

  • Feed: 80 inches per minute (16mm/sec)
  • Speed (rpm): 10000-14000
  • Max pass depth: 0.5″ / 6mm
  • Stepover: 30%
  • For CNC routers, see this speeds & feeds table

FREE Feeds & Speeds table PDF. Download by clicking here

 

Additional information

Weight 4 oz
Dimensions 9 × 7 × .5 in

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