Stub Screw Machine Twist Drill
PRECISION TWIST Stub Screw Machine Twist Drills - Drill Point Angle: 135°   Tool Material: High Speed Steel   Drill Type: Stub Length   Overall Length : 2-1/2   Point Sharpening Type: Split Point   Size : E

Stub Screw Machine Twist Drill

Item #: 01-310-105
Size: E, 1/4"
Finish Coating: Black Oxide
Size Type: Fractional

Master Catalog Listing

Ships: Ships Today Check Locations

Need a different size, length or brand?

View Product Group Page


  • Primarily designed for machining operations in screw machines.
  • Short length offers increased rigidity for machine drilling a variety of materials and alloys.
  • Best suited for drilling steel, cast steel, cast iron, or other alloyed or non-alloyed ferrous materials, they also work well for a variety of non-ferrous and non-metallic materials.
  • May be used with hand held manual drills and either portable or stationary machines.
  • For optimal performance and the best tool life, suitable lubricating/cutting oils or the appropriate coolant fluids are recommended.


  • Right hand (clockwise rotation) cutting direction.
  • Standard two flute design.
  • Standard spiral, helical flutes.
  • Straight shanks correspond to the drill diameter.
  • Stub lengths are proportional to the drill diameter.

Technical Data

  • Manufactured from high speed steel.
  • Precision ground flutes.
  • Cylindrically ground.
  • 118° point or 135° point angle and standard web thickness.
  • 135° split point is self-centering.
  • Steam tempered.
  • Black finished.
TTC Production
  • Black or bright finish depending upon our stock.
Nachi L6563
  • Sizes #1 thru #31: black oxide finish
  • Sizes #32 thru #52: bright finish
Product Specifications
Size E, 1/4"
Finish Coating Black Oxide
Size Type Fractional
Drill Point Angle 135°
Cutting Direction Right Hand
Decimal Size 0.2500
Point Sharpening Type Split Point
Drill Type Stub Length
Flute Length 1-3/8"
Decimal Diameter 0.2500
Flute Shape Standard Spiral, Helical Flute
Hardness 58 to 60 RC
Manufacturing Method Cylindrically ground
No. of Flutes 2
Overall Length 2-1/2"
Series R42C
Shank Style Straight Shank
Tool Material High Speed Steel
Type Stub Screw Machine Twist Drills
Weight 0.02 lbs.
zFlute Length_Inch_DONOTUSE 1-3/8
Country of Origin Import

Be the first to review this product: