Description
The Irwin 3/8″ x 3-1/8″ HSS Fractional Screw Machine Drill Bit (30124) is a premium, stubby-style drill bit crafted for professional and industrial use. Engineered to offer superior stability and precision, its shorter screw-machine length enhances rigidity for demanding tasks. The high-speed steel construction combined with a black oxide finish ensures reliable performance across a wide range of materials—from aluminum and brass to stainless steel, cast iron, and plastics—making it a versatile choice for machine shops, automotive repair, and routine maintenance.
KEY FEATURES AND BENEFITS:
- Self-centering Split-Point Tip: The 135° split-point begins drilling on contact, eliminating walking for precise hole placement.
- Stubby, Screw-Machine Length Design: This compact form increases strength and rigidity under heavy load.
- Durable HSS with Protective Finish: Crafted from high-speed steel and treated with black oxide to resist corrosion and reduce friction.
- Straight Shank: Ensures a secure fit in standard drill chucks for stable operation.
SPECIFICATIONS:
- Drill Diameter: 3/8″
- Overall Length: 3-1/8″
- Flute Length (Cutting Depth): 1-13/16″
- Point Angle: 135°
- Material: High-Speed Steel (HSS)
- Finish: Black Oxide
- Shank Type: Straight
- Number of Flutes: 2
- Cutting Direction: Right-Hand
HOW TO USE:
- Prepare the drill: Insert and securely tighten the straight shank into your drill chuck.
- Mark the spot (optional): Use a center punch for improved precision; the split-point is self-centering.
- Select speed: Choose a slower speed for hard metals; faster speeds are acceptable for softer materials.
- Begin drilling: Apply steady pressure and allow the bit to initiate the hole before increasing force.
- Clear debris: Remove the bit occasionally to clear chips expelled by the two flutes.
BENEFITS OF USING IRWIN 3/8″ X 3-1/8″ HSS FRACTIONAL SCREW MACHINE DRILL BIT (30124):
- Ensures accurate hole starts with its self-centering split-point design.
- Offers greater rigidity and strength in a compact form.
- Versatile across multiple materials for broad application needs.
- Long-lasting performance thanks to high-speed steel and a corrosion-resistant coating.
- Improves workflow with efficient drilling and debris management.
FEATURES:
- Stubby (screw-machine length) design for enhanced control.
- 135° split-point tip to eliminate walking.
- Crafted from HSS with a black oxide protective finish.
- Straight shank for secure chuck fitment.
- Right-hand cutting and dual-flute configuration for smooth chip removal.
