Jobbers Drill
VIKING 27/64 240-UB Ultra Bor Super Premium HSS Heavy Duty Jobbers Length Drill

Jobbers Drill

Made In The USA
Item #: 01-910-055
Size Type: Fractional
Size: 27/64"
Drill Point Angle: 135°

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Designed for series 300 stainless steel, except for 303


  • Much tougher than cobalt steel.
  • Thin web design penetrates work hardening stainless steel fast enough to continually cut beneath the chip which is hardening from deformation.
  • 135° split point design stops drill walking, holds tighter hole size and takes a smaller chip resulting in less heat.
  • Low temperature stress relief improves lubricity and toughness.


  • Outperforms cobalt drills in work hardening stainless steel applications.


  • Manufactured to NAS 907B specification.
  • Nito-carburized flute has an increased rockwell hardness.
  • Rich amber color.
Product Specifications
Size Type Fractional
Size 27/64"
Drill Point Angle 135°
Tool Material Super Premium High Speed Steel
Finish Coating Bronze
Cutting Direction Right Hand
Application Drilling series 300 stainless steel except for 303
Decimal Diameter .4219"
Decimal Size .4219"
Diameter 27/64"
Drill Grade Heavy Duty
Drill Type Jobbers Length
Flute Length 3-15/16"
Flute Shape Standard Spiral, Helical Flute
Hardness 58 to 60 RC
Helix Angle 30°
No. of Flutes 2
Length Style Jobbers Length
Overall Length 5-3/8"
Point Sharpening Type Split Point
Package Qty 6
Series 240-UB
Prop. 65 Yes
Shank Style Straight Shank
Type Jobbers Drill
weight 0.08 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.