This is a vertical, close-up shot of a metallic gray core drill bit. It features a wide, ribbed cylindrical head at the top with a few bronze-colored cutting elements visible, transitioning into a long, smooth cylindrical shank at the bottom.
This image shows a robust, metallic gray core drill bit, designed for heavy-duty drilling. It features a wide, ribbed cylindrical head with aggressive cutting teeth at the top, tapering down to a narrower, smooth shank that extends downwards and slightly to the right.
This is a vertical, close-up shot of a metallic gray core drill bit. It features a wide, ribbed cylindrical head at the top with a few bronze-colored cutting elements visible, transitioning into a long, smooth cylindrical shank at the bottom.
This image shows a robust, metallic gray core drill bit, designed for heavy-duty drilling. It features a wide, ribbed cylindrical head with aggressive cutting teeth at the top, tapering down to a narrower, smooth shank that extends downwards and slightly to the right.
This is an eye-level, full-shot of a heavy-duty, gray core drill bit, laid horizontally against a plain white background. The bit features a wide, ribbed cylindrical cutting head on the left with prominent teeth, transitioning to a narrower, smooth shaft on the right that ends in a flat, rectangular attachment point.
This is an eye-level, full-shot of a heavy-duty, gray core drill bit, laid horizontally against a plain white background. The bit features a wide, cylindrical cutting head on the left with prominent horizontal ribs and multiple teeth, transitioning to a narrower, smooth shaft on the right that ends in a flat, rectangular attachment point.
his is a close-up, vertical shot of a robust, metallic gray core drill bit. It features a wide, ribbed cylindrical head with four prominent, bronze-colored cutting teeth visible at the very top, transitioning into a narrower, smooth shank at the bottom.
This is a vertical, close-up shot of a metallic gray core drill bit. It has a ribbed cylindrical head at the top with what appear to be cutting teeth, and a long, smooth cylindrical shaft extending downwards, ending in a fluted tip.
This image shows a robust, metallic gray core drill bit, designed for heavy-duty drilling. It features a wide, ribbed cylindrical head with aggressive cutting teeth at the top, tapering down to a narrower, smooth shank that extends downwards and slightly to the right.
This image shows a robust, metallic gray core drill bit, designed for heavy-duty drilling. It features a wide, ribbed cylindrical head with aggressive cutting teeth at the top, tapering down to a narrower, smooth shank that extends downwards and slightly to the right.
This is a horizontal shot of a large, dark gray core drill bit. The prominent feature is a wide, ribbed cylindrical drilling head on the left, with an extension of a narrower, smooth shank protruding horizontally to the right.
This is an eye-level shot of a long, metallic gray core drill bit, angled so its tip points towards the bottom right. It has a ribbed, cylindrical drilling head on the upper left, transitioning into a long, smooth shank.
This image shows a robust, metallic gray core drill bit, designed for heavy-duty drilling. It features a wide, ribbed cylindrical head with aggressive cutting teeth at the top, tapering down to a narrower, smooth shank that extends downwards and slightly to the right.
This image shows a robust, metallic gray core drill bit, designed for heavy-duty drilling. It features a wide, ribbed cylindrical head with aggressive cutting teeth at the top, tapering down to a narrower, smooth shank that extends downwards and slightly to the right.
This is a horizontal, eye-level shot of a large, metallic gray core drill bit. It features a wide, ribbed cylindrical drilling head on the left with visible cutting teeth, extending into a long, smooth cylindrical shank to the right, which has a flattened end for attachment.
This is a vertical, close-up shot of a metallic gray core drill bit. It features a wide, ribbed cylindrical head with several bronze-colored cutting teeth at the very top, transitioning into a narrower, smooth cylindrical shank extending downwards.
This is a horizontal, eye-level shot of a large, metallic gray core drill bit. It features a wide, ribbed cylindrical drilling head on the left with visible cutting teeth, extending into a long, smooth cylindrical shank to the right, which has a flattened end for attachment.
This is a vertical, close-up shot of a metallic gray core drill bit. It features a wide, ribbed cylindrical head with a smaller, pointed drill bit protruding from its center top, transitioning into a narrower, smooth cylindrical shank at the bottom.
This is a vertical, close-up shot of a metallic gray core drill bit. It features a wide, ribbed cylindrical head with several bronze-colored cutting teeth at the very top, transitioning into a long, smooth cylindrical shank that narrows slightly towards a fluted end at the bottom.
This is a vertical, close-up shot of a metallic gray core drill bit. It features a wide, ribbed cylindrical head with several bronze-colored cutting teeth at the very top, transitioning into a long, smooth cylindrical shank that narrows slightly towards a fluted end at the bottom.
BOSCH

Bosch Rotary Hammer Core Bits SDS Max 1 Piece Cutters (Asymmetric Carbide Teeth Wave Design Centering Pilot Concrete Switch Box Hole Boring)

Only 2 left
SKU: HC8517
$136.29 USD

Size (Diameter x Length) Inches
Description

Bosch Promotional Logo Logout

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

The Bosch SDS-max® one-piece rotary hammer core drill bits bore large-diameter electrical switch box cavities, plumbing pipe clearances, and conduit penetrations across solid poured concrete, structural masonry block, and hard stone aggregate. Engineered with a continuous solid steel one-piece body and wave-pattern external geometry, these heavy-duty core cutters deliver up to 40% faster drilling speeds while eliminating the kinetic energy loss, loose coupling threads, and bit slippage associated with modular multi-piece coring setups. Outfitted with high-density asymmetric tungsten carbide teeth matched to bit diameter, an integrated carbide-tipped centering starter bit that prevents wandering on smooth concrete surfaces, an extra-long dual-flute U-shaped debris evacuation shank, and a universal slotted SDS Max drive shank, they equip commercial electricians, HVAC technicians, and mechanical contractors with fast, high-impact coring productivity.

Best Used For:

  • Electrical Outlet and Switch Box Installation: Coring precise, clean circular pockets in poured concrete walls, structural CMU block, and brick facings for commercial electrical junction and receptacle boxes.
  • Plumbing Supply Line and Drain Passages: Drilling clean through-hole pathways in foundation walls and structural masonry for water service lines, copper pipes, and PVC drain sleeves.
  • HVAC Conduit and Line Set Coring: Boring large-diameter penetrations through dense concrete envelopes for refrigerant lines, electrical disconnects, and condensate drains.

Key Performance & Safety Features

  • Continuous One-Piece Architecture: Solid-body steel construction transfers 100% of the hammer's percussive impact force straight to the carbide cutting crown without modular joint deflection.
  • High-Velocity Wave Pattern Design: Mathematically engineered exterior wave pattern transfers energy efficiently to accelerate drilling velocity up to 40% over conventional core bits.
  • Asymmetric Carbide Tooth Geometry: Diameter-matched carbide teeth provide aggressive material breakdown, reduced cutting resistance, and smooth, quiet rotational cycles.
  • Integrated Centering Pilot Bit: Built-in carbide-tipped guide bit ensures dead-on hole placement and prevents bit wandering on slick concrete floors and vertical walls.
  • Dual-Flute U-Shape Evacuation Shank: Deeply sculpted extraction flutes rapidly pull concrete dust and pulverized aggregate out of deep blind holes, keeping operational temperatures low.
  • Universal SDS Max Shank Fitment: Standard heavy-duty slotted drive shank locks securely into all corded and cordless SDS Max rotary hammer drills for zero-slip torque transmission.

What's Included

  • (1) Bosch SDS-max® One-Piece Rotary Hammer Core Bit with Integrated Centering Pilot Tip in User-Selected Size & Model:
    • HC8501: 1-3/4" Diameter x 12" Overall Length (7-1/4" Usable Core Depth)
    • HC8506: 1-3/4" Diameter x 22" Overall Length (17-1/4" Usable Core Depth)
    • HC8510: 2" Diameter x 12" Overall Length (7-1/4" Usable Core Depth)
    • HC8515: 2" Diameter x 22" Overall Length (17-1/4" Usable Core Depth)
    • HC8516: 2-1/8" Diameter x 22" Overall Length (17-1/4" Usable Core Depth)
    • HC8517: 2-3/8" Diameter x 22" Overall Length (17-1/4" Usable Core Depth)
    • HC8521: 2-1/2" Diameter x 12" Overall Length (7-1/4" Usable Core Depth)
    • HC8526: 2-1/2" Diameter x 22" Overall Length (17-1/4" Usable Core Depth)
    • HC8531: 2-5/8" Diameter x 22" Overall Length (17-1/4" Usable Core Depth)
    • HC8536: 2-3/4" Diameter x 22" Overall Length (17-1/4" Usable Core Depth)
    • HC8540: 3-1/8" Diameter x 12" Overall Length (7-1/4" Usable Core Depth)
    • HC8545: 3-1/8" Diameter x 22" Overall Length (17-1/4" Usable Core Depth)
    • HC8550: 3-1/2" Diameter x 12" Overall Length (7-1/4" Usable Core Depth)
    • HC8555: 3-1/2" Diameter x 22" Overall Length (17-1/4" Usable Core Depth)
    • HC8055: 3-1/2" Diameter Heavy-Duty Core Bit
    • HC8570: 4" Diameter x 12" Overall Length (7-1/4" Usable Core Depth)
    • HC8575: 4" Diameter x 22" Overall Length (17-1/4" Usable Core Depth)
    • HC8595: 5" Diameter x 22" Overall Length (17-1/4" Usable Core Depth)

Technical Specifications

Manufacturer Brand Bosch Power Tools
Product Line Identifier SDS-max® One-Piece Core Bit Series
Selectable Model Numbers HC8501, HC8506, HC8510, HC8515, HC8516, HC8517, HC8521, HC8526, HC8531, HC8536, HC8540, HC8545, HC8550, HC8555, HC8055, HC8570, HC8575, HC8595
Available Hole Diameter Range 1.750 in. to 5.000 in. (1-3/4", 2", 2-1/8", 2-3/8", 2-1/2", 2-5/8", 2-3/4", 3-1/8", 3-1/2", 4", 5")
Tool Shank Interface Standard SDS Max Heavy-Duty Slotted Universal Drive
Cutter Body Architecture Solid One-Piece Continuous Steel Core Body
Cutting Tip Composition Industrial-Grade High-Density Sintered Tungsten Carbide
Cutter Tooth Layout Asymmetric Diameter-Matched Pattern Configuration
Pilot Starter Design Integrated Carbide-Tipped Centering Pilot Tip
Debris Flute Geometry Long 2-Flute U-Shape High-Capacity Dust Channels
Penetration Efficiency Rating Up to 40% Faster Penetration via Wave Pattern Body
Operational Mode Setting Rotary Hammer Mode Only (Hammer + Rotation)
Measurement Standard Fractional Imperial (SAE) Standard Dimensions
Suitable for material type Structural Concrete, Hard Aggregates, Brick, & Masonry

Pro-Tip: When coring deep blind holes for electrical switch boxes, periodically retract the core bit while running the hammer drill to clear pulverized masonry slurry from the U-shaped flutes; keeping the core channel clear prevents aggregate binding and accelerates cutting speed.