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Description
The Irwin 21/64" x 4-5/8" Black & Gold Drill Bit w/ Split Point (3019021B) is a high-performance tool engineered for precision and reliability. Designed as a jobber length, straight shank drill bit, it is part of the Irwin Series 30190, a line known for its quality and efficiency. This bit is made from premium high-speed steel (HSS) and features a distinctive black and gold oxide coating that provides superior corrosion resistance, extending the tool's lifespan.
KEY FEATURES AND BENEFITS:
- 135° Split-Point Tip: Self-centering design starts drilling immediately, eliminating walking and ensuring accurate hole placement without a center punch.
- Premium High-Speed Steel Construction: Provides strength and longevity for demanding drilling tasks.
- Black and Gold Oxide Coating: Offers excellent corrosion resistance, protecting the bit from rust and wear.
- 3-Flatted Shank: Delivers an exceptional grip in the drill chuck, preventing slippage and improving stability.
- Heavy-Duty Web Construction: Adds strength and durability, suitable for drilling a wide range of materials including steel and wood.
SPECIFICATIONS:
- Model Number: 3019021B
- Product Series: 30190
- Diameter: 21/64" (0.3281")
- Overall Length: 4-5/8" (4.625")
- Flute Length: 3-5/16" (3.3125")
- Material: High-Speed Steel (HSS)
- Finish: Black and Gold Oxide
- Shank Type: 3-Flat Shank
- Point Type: 135° Split Point
HOW TO USE:
- Preparation: Select the appropriate drill and ensure it is in good working condition. Securely insert the 21/64" drill bit into the chuck. The 3-flatted shank provides a strong, non-slip grip.
- Setup: Mark the exact location where you need to drill. Due to the self-centering split-point tip, a center punch is generally not required for soft or medium-hard materials.
- Drilling: Set the drill to the appropriate speed for the material. Begin drilling with steady, light pressure. The split point engages immediately for a clean start.
- Technique: Maintain consistent pressure and a straight drilling angle. Let the bit do the work. Avoid excessive force to prevent overheating or breakage.
- Finishing: Once the hole is complete, smoothly back the bit out while the drill is running to clear debris. Clean the area and bit before storage.
BENEFITS OF USING IRWIN 21/64" X 4-5/8" BLACK & GOLD DRILL BIT W/ SPLIT POINT (3019021B):
- Self-centering 135° split-point tip prevents walking and enables instant drilling starts.
- Premium HSS and black and gold oxide coating ensure excellent corrosion resistance and longer tool life.
- 3-flatted shank offers a secure, non-slip grip for better control and safety.
- Heavy-duty web design enhances strength and reduces breakage risk.
- Versatile for drilling materials from soft wood to tough stainless steel.
FEATURES:
- Laser-etched markings for easy size identification.
- Heavy-duty web construction for increased durability and strength.
- Reduced feed pressure requirement for easier drilling.
- Designed for use with portable drills and drill presses.
- Black and gold oxide finish protects against rust and reduces friction.
- Jobber length suitable for general-purpose applications.
- Suitable for drilling mild steel, high alloy steels, stainless steel, and other materials.
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