Irwin 7/8" x 6" Silver & Deming Drill Bit (91156)
The Irwin 7/8" x 6" Silver & Deming Drill Bit (91156) is a high-performance tool engineered for heavy-duty drilling applications. This bit is specifically designed to create large holes while fitting into standard 1/2" drill chucks, making it a versatile addition to any workshop or professional toolkit. Made from premium M7 high-speed steel, it is built to resist heat and abrasion, providing a longer service life even under demanding conditions. The black oxide coating adds an extra layer of protection, preventing corrosion and reducing friction during use. The 118° chisel point is a standard feature for general-purpose drilling, making it effective for a wide array of materials, including various metals, wood, and plastic. The shank has been engineered with a reduced diameter and three flats to ensure a firm, non-slip grip in keyless and keyed chucks alike. This makes the Irwin 91156 a reliable choice for tasks in metal fabrication, automotive repair, and other heavy-duty drilling tasks.
KEY FEATURES AND BENEFITS:
Secure Grip: The 1/2” reduced shank with 3-flats grips securely in a drill chuck, minimizing slippage and enhancing user control.
Corrosion Resistance: The black oxide coating on the premium high-speed steel protects the bit from rust and corrosion, extending its life.
Versatile Performance: The 118° chisel point tip is suitable for general-purpose applications, allowing the bit to perform effectively across a wide range of materials.
Heavy-Duty Application: Engineered for tough drilling jobs, making it ideal for professional use in automotive, metal fabrication, and body shop environments.
Reduced Friction: The black oxide finish helps to reduce friction and heat buildup during drilling, which can improve drilling speed and bit longevity.
Drill Diameter: 7/8 inches (0.875 inches)
Overall Length: 6 inches
Shank Diameter: 1/2 inches
Shank Type: Reduced with 3 flats
Material: M7 High-Speed Steel (HSS)
Point Angle: 118 degrees
Finish: Black Oxide
Select the correct drill: Ensure it has a 1/2" chuck capacity. Securely tighten the drill bit into the chuck, making sure the 3-flatted shank fits snugly to prevent rotation during use.
Mark the drilling point: Mark the exact center point where the hole is to be drilled. Use a center punch on metal surfaces to create an indentation and guide the bit.
Apply lubricant: For metal drilling, apply cutting lubricant or coolant to reduce friction, dissipate heat, and prolong bit life.
Start drilling: Begin at a slow speed, gradually increasing as the bit cuts into the material. Apply steady, firm pressure without forcing the bit.
Clear debris: Periodically remove chips and debris to prevent clogging. When finished, remove the bit from the hole while the drill is still running to avoid binding.
BENEFITS OF USING IRWIN 7/8" X 6" SILVER & DEMING DRILL BIT (91156):
Allows the creation of large diameter holes with a standard 1/2-inch drill.
Provides a reliable and secure fit in the drill chuck, minimizing the risk of slippage.
Offers good performance in a variety of materials, including metal, wood, and plastic.
The premium M7 high-speed steel and black oxide coating contribute to a long product lifespan.
Designed for demanding, heavy-duty applications, ensuring it can handle tougher jobs.
Effective for professional trades like metal fabrication and automotive repair.
Capable of drilling large holes in metal, wood, and plastic.
Reduced 1/2-inch shank diameter for compatibility with standard drill chucks.
Three-flat shank design for increased grip stability.
Made from M7 high-speed steel for durability and extended tool life.
Black oxide coating to resist rust and corrosion.
118° chisel point design for efficient, general-purpose drilling.
Product identification
- Brand: Irwin
- Model / MPN: 91156
