Core Type Drill
Viking Type 284-UB 11/16 4 Flute 3 Flats On Shank Hole Hog Drill

Core Type Drill

Made In The USA
Item #: 01-129-344
Tool Material: M2 High Speed Steel
Drill Grade: M2
Drill Type: Core

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Eliminates the catching and hogging-in when breaking through thinner materials such as truck frames


  • Designed for enlarging existing holes exclusively.
  • May replace tapered reamers in many applications.
  • Although (UB) Ultra bore drills will substantially outperform cobalt drills in most stainless steel, it is recommended that cobalt drills be used in the machining of free machining stainless steels such as 400 series & 303 materials along with titanium alloys.


  • Gold surface treated body and clearance for maximum lubricity.
  • Special Hi- Molybdenum tool steel.
  • Often improves the hole results when compared to Silver & Deming drills.
Viking 22100 Premium HSS 11/16" 4 Flute Hole Hog 4 Flute Core Drill
Product Specifications
Tool Material M2 High Speed Steel
Drill Grade M2
Drill Type Core
Finish Coating Black & Gold
Flute Length 1-7/8"
Flute Shape Spiral
Hardness 58 to 60 RC
Manufacturing Method Standard
Minimum Hole Diameter 7/16"
No. of Flutes 4
Series Type 284-UB
Prop. 65 Yes
Shank Style Reduced Shank
Type Core Type Drill
Weight .308 lbs.
Prop 65 Warning Many metalworking products do contain metals that are included in the latest Prop 65 warning. Exposure to the elements can be harmful. May cause cancer and reproductive harm.

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