Bosch Core Bit Extension T3922 SDS Plus 3 Inch SpeedCore Adapter (Forged Alloy Steel Threaded Mandrel Deep Wall Concrete Brick Hole Drilling)

Bosch T3922 SpeedCore™ SDS-Plus 3" Thin-Wall Core Bit Extension Shank

The Bosch T3922 SpeedCore™ 3-inch thin-wall core bit extension adapter extends the usable drilling depth of rotary hammer core cutters across thick concrete foundations, brick barrier walls, and structural masonry blocks. Engineered to interface directly between standard SDS-Plus rotary hammer drill chucks and the modular Bosch SpeedCore™ thin-wall core bit family, this industrial drive shank transfers high-frequency percussive impact energy and rotary torque without mechanical deflection. Outfitted with precision-machined drive threads that lock core cutters securely in place, a heavy-duty forged alloy steel body built to withstand rigorous hammer-drill stress, and a slotted SDS-Plus shank profile, it equips commercial electricians, mechanical plumbers, and HVAC technicians with extended reach for deep utility switch box and conduit wall passages.

Best Used For:

• Deep Electrical Conduit Wall Penetrations: Extending core bit reach through thick masonry brick, poured concrete, and cinder block walls to install commercial junction conduit runs.
• Switch Box and Receptacle Enclosure Boring: Providing extra clearance and reach when coring out electrical outlet and switch box pockets in recessed masonry locations.
• HVAC Line and Plumbing Passages: Drilling clean, extended-depth clearance holes through foundation walls and structural masonry for copper tubing, drain pipes, and refrigerant lines.

Key Performance & Safety Features

• Modular SpeedCore™ Integration: Couples seamlessly with all Bosch SpeedCore™ thin-wall rotary hammer core bit diameters for fast, versatile modular setup.
• 3-Inch Extended Reach: Adds 3 inches of usable drilling depth to core cutters, facilitating through-hole penetrations in thick masonry walls.
• High-Torque Forged Alloy Steel: Precision heat-treated alloy steel construction withstands intense rotary percussion without bending, twisting, or fatiguing.
• Precision Threaded Interface: High-tolerance male threads seat firmly into thin-wall core bodies to maintain true axial alignment and eliminate wobble.
• Universal SDS-Plus Connection: Slotted SDS-Plus shank fits all standard corded and cordless rotary hammer chucks for quick, keyless installation.
• Efficient Energy Transfer: Solid-body core shank channels maximum impact force straight to the carbide cutting teeth for high drilling velocity.

What's Included

• (1) Bosch T3922 SpeedCore™ 3" SDS-Plus Thin-Wall Core Bit Extension Shank

Technical Specifications

Pro-Tip: Apply a light dab of anti-seize lubricant to the male extension threads prior to screwing on your SpeedCore thin-wall cutter; this ensures effortless bit removal after completing high-vibration, deep-wall coring cycles.