Bosch Rotary Hammer Bits SDS Max Thru Hole Cutters (One Piece Carbide Face Deep Spiral Flutes Heavy Aggregate Concrete Brick Masonry Core Boring)

Bosch SDS-max® Thru-Hole One-Piece Carbide Rotary Hammer Drill Bits

The Bosch SDS-max® Thru-Hole rotary hammer drill bits bore large-diameter utility penetrations entirely through poured concrete foundation footings, structural bridge decks, and multi-wythe masonry walls in a single continuous pass. Engineered with a solid one-piece continuous steel body, these heavy-duty concrete cutters eliminate the threaded joint failures, loose centering pins, and binding issues common to modular multi-piece core bit setups. Outfitted with an aggressive high-density tungsten carbide breakthrough head that pulverizes dense stone aggregate upon impact, deeply machined high-volume spiral evacuation flutes that channel heavy rubble and dust out of the bore path, and a slotted universal SDS Max drive shank, they equip mechanical plumbers, commercial electricians, and HVAC contractors with uninterrupted high-impact boring velocity.

Best Used For:

• Commercial Plumbing and Drainage Passages: Boring large-diameter through-holes in concrete foundations and grade beams for cast iron, PVC, and copper pipe sleeves.
• Electrical Service Entrance and Feeder Routing: Drilling deep, continuous conduit holes through multi-wythe brick, stone facades, and CMU block walls for high-voltage service lines.
• HVAC Line Set and Mechanical Duct Coring: Penetrating thick structural concrete slabs and foundation footings in a single pass for commercial refrigerant lines and ventilation piping.

Key Performance & Safety Features

• Continuous One-Piece Construction: Solid structural alloy steel shank transfers maximum impact energy directly to the cutting face without threaded joint flex.
• Aggressive Carbide Breakthrough Tip: Precision-ground industrial carbide cutter face delivers high-impact shattering action across dense aggregate and stone.
• High-Volume Deep Spiral Flutes: Wide, deep evacuation channels eject large concrete chips and abrasive masonry dust rapidly to prevent bit binding.
• Fatigue-Resistant Structural Alloy: High-temperature heat-treated core body resists bending stress and thermal fatigue during continuous heavy hammer operations.
• Universal SDS Max Shank Fitment: Standard slotted drive provides absolute torque transfer and non-slip locking in high-capacity SDS Max rotary hammer drills.
• Single-Pass Deep Penetration: Bores complete through-holes in thick concrete barriers without stopping to adjust pilot pins or modular extension adapters.

What's Included

• (1) Bosch SDS-max® Thru-Hole Rotary Hammer Drill Bit in User-Selected Size & Model:
  • HC6501: 1-3/4" Diameter x 24" Usable Length (31" Overall Length)
  • HC6511: 2" Diameter x 24" Usable Length (31" Overall Length)
  • HC6521: 2-1/2" Diameter x 24" Usable Length (31" Overall Length)
  • HC6531: 3-1/8" Diameter x 24" Usable Length (31" Overall Length)

Technical Specifications

Pro-Tip: Maintain a steady, firm forward pressure and withdraw the bit slightly every few inches while the hammer is running; this allows the deep spiral flutes to eject accumulated aggregate chunks freely and prevents bit jamming in deep foundation penetrations.