Bosch Rotary Hammer Core Bits SDS Plus SpeedCore Thin Wall Cutters (Tungsten Carbide Teeth Ejector Slot Concrete Brick Block Masonry Hole Boring)

Bosch SpeedCore™ SDS-Plus Thin-Wall Carbide Rotary Hammer Core Bits

The Bosch SpeedCore™ SDS-Plus thin-wall rotary hammer core bits bore clean, large-diameter utility penetrations across concrete masonry units (CMU block), structural brick facades, limestone, and aggregate masonry using lightweight SDS-Plus rotary hammer drills. Engineered with an ultra-efficient thin-walled hollow core profile, these industrial cutters concentrate rotary hammer impact energy along a narrow cutting kerf, requiring significantly less rotational torque and impact energy than thick-wall core cutters. Outfitted with high-grade tungsten carbide cutting teeth brazed to a heat-treated alloy steel body, an integrated side ejector portal slot for fast stone slug removal, and full compatibility with standard Bosch SDS-Plus centering pilots and extension mandrels, they equip commercial electricians, mechanical plumbers, and HVAC installers with fast, blowout-free circular conduit boring speed.

Best Used For:

• Commercial Electrical Conduit and Junction Passages: Boring clean, circular through-holes in exterior brick walls, hollow block, and mortar joints for conduit pipes and weatherproof outlet boxes.
• HVAC Refrigerant Line and Drain Penetrations: Core drilling smooth clearance holes through foundational brick and masonry blocks for mini-split line sets and condensate drains.
• Plumbing Pipe Rough-Ins: Cutting large-diameter pipe pathways through foundational masonry walls and limestone backing without cracking fragile structural faces.

Key Performance & Safety Features

• Premium Tungsten Carbide Teeth: Heavy-duty industrial carbide tips withstand severe abrasion, maintaining sharp cutting edges across dense masonry.
• Thin-Wall Energy-Efficient Profile: Minimized cutting surface reduces motor drag and impact energy loss, enabling smaller SDS-Plus rotary hammers to drill large holes.
• Integrated Side Slug Ejector Slot: Dedicated cleanout window allows rapid push-out extraction of trapped masonry core plugs to keep drilling cycles continuous.
• SpeedCore System Compatibility: Threads securely onto standard Bosch SDS-Plus drive mandrels and centering pilot bits for straight, true hole tracking.
• Vibration-Dampening Geometric Balance: Smooth rotational balance minimizes harmonic vibration feedback to protect internal hammer drill drive mechanisms.
• Clean Edge Exit Performance: Precision tip alignment reduces perimeter spalling and breakout when penetrating fragile decorative masonry surfaces.

What's Included

• (1) Bosch SpeedCore™ SDS-Plus Thin-Wall Rotary Hammer Core Drill Bit in User-Selected Size:
  • T3910SC: 1" Diameter Thin-Wall Core Bit
  • T3911SC: 1-1/8" Diameter Thin-Wall Core Bit
  • T3912SC: 1-1/4" Diameter Thin-Wall Core Bit
  • T3913SC: 1-3/8" Diameter Thin-Wall Core Bit
  • T3914SC: 1-1/2" Diameter Thin-Wall Core Bit
  • T3915SC: 1-3/4" Diameter Thin-Wall Core Bit
  • T3916SC: 2" Diameter Thin-Wall Core Bit
  • T3917SC: 2-1/2" Diameter Thin-Wall Core Bit
  • T3918SC: 2-5/8" Diameter Thin-Wall Core Bit
  • T3919SC: 3-1/8" Diameter Thin-Wall Core Bit
  • T3920SC: 3-1/2" Diameter Thin-Wall Core Bit
  • T3921SC: 4" Diameter Thin-Wall Core Bit

Technical Specifications

Pro-Tip: Use a centering pilot bit to establish your initial groove in the masonry wall; once the carbide core teeth have penetrated roughly 1/4 inch into the material, remove the pilot pin to allow the thin-wall core to slice unobstructed through the remaining wall depth.