BIT SELF FEED 1.5"X5" CS

PRODUCT DESCRIPTION:

The Irwin Speedbor MAX Self-Feed Wood Bit #3046008 is a large-diameter wood-boring drill bit designed for fast, clean cutting in wood, particularly for applications like creating holes for pipe or conduit, or other needs where large clear holes are required. It is part of Irwin’s “Self-Feed” or “Speedbor” line, meaning it has a feed screw/tip to pull itself through wood as it cuts, reducing effort and improving speed. The design also emphasizes durability, reduced wobble, and ease of use via a quick-change impact shank.

INSIGHTS:

Drill type: Best used with impact-drills or drills capable of delivering both torque and control. A drill with a hex quick-change chuck is ideal.

Speed control: Use moderate speeds for large diameter bits; too fast may overheat or burn, or cause tear-out. Using pilot holes sometimes helps, though the self-feed screw tip is designed to act as a pilot.

Support workpiece: Large holes tend to cause vibration; securing the wood firmly is important. Backing board can help reduce tear-out on exit side.

Feed screw maintenance: The screw/shank tip is the ‘self-feeding’ mechanism; keep it sharp, clean, and replace when worn to maintain performance.

Cleanup: When drilling deep holes, periodically withdraw the bit to clear chips; otherwise chip accumulation can stall the drill or cause binding.

Material considerations: While designed for wood, in coarser or denser woods extra care needed; wet wood, knots, etc. also slow progress and add stress.

TECHNICAL SPECIFICATIONS:

Brand: IRWIN

Item Model Number: 3046008

Product Type: Wood Drill Bit

Material: High Carbon Steel

Shank Size: 7/16"

Shank Type: Hex

Overall Length: 5"

Diameter: 1-1/2"

Point: Spear Point

Finish Type: Brushed

Number of Flutes: 3

Number of Cutters: 3

Surface Recommendation: Wood

Shipping Weight: 1 lb