1/4" HSS Heavy Duty 135 Split Point Black & Gold Jobber Drill

SKU 404-2912

1/4" HSS Heavy Duty 135 Split Point Black & Gold Jobber Drill

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$0.90
12 per case
SKU 404-2912
drill category Jobber Drills
Brand Shars Tool
drill size 1/4
flute length 2-3/4
overall length 4
Material HSS
finish coating black and gold
drill grade heavy duty
point angle 135
type size fractional
coolant fed no
Full Details

Product Spotlight

  • Ideally designed  for high production machine works in low and medium carbon steel, as well as soft, non-ferrous material like aluminum, brass, bronze, and copper. M2 grade steel has a good red-hardness and retains its cutting edge sharpness longer than other general purpose high speed steel, but not as shock resistant or as flexible as other HSS grade with less tungsten. Sets furnished in metal or plastic case. 
  • 135° Self-centering Split Point prevents walking when starting a hole and is commonly on heavy duty tools. 
  • Black and gold finish
  • Heavy duty drill bit usually combine a split point to prevent walking and stronger flute for better rigidity. Excellent choice for harder material.
    • Workpiece material: SAE1045.
    • Workpiece material hardness: HRC15
    • Drilling Operation: blind hole drilling
    • Drill Diameter: 15/64"
    • Cutting Parameters: Vc=62 SFPM; fr=0.0078 in/r; H=0.826in
    • Cooling System: water soluble cooling 
    • Conclusion: Shars industrial grade HSS6542 drill has performed 194 numbers of holes before showing normal wear while generic import grade HSS4241 tin coated drill from company A has performed 80 numbers of holes before showing edge chipping. Industrial grade M35 cobalt drill has performed 266 numbers of holes before showing normal wear. 
    • Grade HSS6542 and M35 drill set from Shars Tool has shown significant improvement in tool life than other generic import drills on the market. 
    • Better life improves machining efficiency.

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