Product Description
Milwaukee SHOCKWAVE Impact Duty Carbide Bellhanger Multi-Material Bit, 3/8 in. x 16 in. x 18 in.
Model Number: 48-20-8864
The Milwaukee 48-20-8864 SHOCKWAVE Impact Duty Carbide Bellhanger Multi-Material Bit is a professional installer drill bit engineered for low-voltage trades, telecom installers, electricians, security system installers, and any contractor pulling small-gauge wire through walls, floors, and structural members across mixed-material assemblies. As a true multi-material bit, the 48-20-8864 drills cleanly through brick, block, concrete, steel, aluminum, ceramic tile, backerboard, wood, PVC, stucco, and drywall without requiring the operator to switch between dedicated masonry, wood, or metal bits as the drill encounters different layers. The 18 in. overall length with 16 in. working depth gives the installer the reach to drill completely through wall plates, joists, and stacked layers in one continuous pass. The defining bellhanger feature is the pull-through hole in the carbide tip itself, which lets the installer thread cable, fish tape, pull string, or low-voltage wire directly through the bit and pull the run back through the hole as the bit is withdrawn, saving the second trip to thread the wire through after drilling.
The aggressive multi-grind carbide tip is the engineering at the heart of this bit's multi-material performance. The carbide geometry is designed to deliver up to 10 times longer life in stacked-material applications compared to standard installer bits, and up to 85 percent faster drilling speeds in metal compared to standard masonry bits, eliminating the need to keep separate dedicated bits for different layer types and reducing both bit inventory and installer time on the job. The carbide composition and tip grind are engineered for the high-impact, high-rotational-load environment of impact drivers and hammer drills, which is what SHOCKWAVE Impact Duty branding signifies across Milwaukee's accessory lineup. Conventional twist drill bits typically shatter or strip in impact tools because they are designed for the smoother torque profile of a standard drill driver, while SHOCKWAVE Impact Duty bits are engineered specifically for the high-stress shock loading that impact drivers generate.
The 1/4 in. hex shank fits any standard impact driver, drill driver, or hammer drill chuck without modification, making the 48-20-8864 a true all-tool bit that one operator can move between platforms across a workday without bit swaps or chuck changes. Typical applications include running computer network cable through framing, pulling security system wiring through wall cavities, installing phone and cable TV drops, threading speaker wire through finished walls, and any small wire system installation where the operator needs to drill through mixed materials and immediately pull cable through the same hole. The 3/8 in. bit diameter provides clearance for most low-voltage cable bundles including Cat5e, Cat6, RG6 coax, alarm wire, speaker wire, and similar small-gauge installer cables. Always operate the bit within the manufacturer's recommended RPM and impact ratings, use the correct chuck for the tool, and wear appropriate PPE for the material being drilled, especially when drilling concrete, brick, or other dust-generating materials.
Features
- SHOCKWAVE Impact Duty engineered for impact drivers and hammer drills
- True multi-material bit, drills brick, block, concrete, steel, aluminum, ceramic tile, backerboard, wood, PVC, stucco, and drywall
- Pull-through hole in the carbide tip for cable and wire pulling applications
- Aggressive multi-grind carbide tip for fast cutting in mixed materials
- Up to 10X longer life in stacked-material applications
- Up to 85% faster drilling speeds in metal versus standard masonry bits
- 18 in. overall length provides extra reach for through-hole applications
- 16 in. working drill depth for complete pass-through cuts in walls and stacked framing
- 3/8 in. bit diameter accommodates Cat5e, Cat6, RG6, and other small-gauge installer cables
- 1/4 in. hex shank compatible with impacts, drill drivers, and hammer drills
- Eliminates the need to switch between dedicated masonry, wood, or metal bits during installs
- Ideal for computer, security, phone, cable, and TV system installation
Specifications
- Manufacturer: Milwaukee Tool
- Catalog Number: 48-20-8864
- Bit Type: SHOCKWAVE Impact Duty Carbide Bellhanger Multi-Material Bit
- Bit Diameter: 3/8 in.
- Working Depth: 16 in.
- Overall Length: 18 in.
- Shank Type: 1/4 in. Hex
- Tip Material: Carbide with multi-grind geometry
- Tip Feature: Pull-through hole for cable and wire pulling
- Materials: Brick, block, concrete, steel, aluminum, ceramic tile, backerboard, wood, PVC, stucco, drywall
- Tool Compatibility: Impact drivers, drill drivers, hammer drills
- Application: Low-voltage and small wire system installation
Includes
- (1) Milwaukee 48-20-8864 SHOCKWAVE Impact Duty Carbide Bellhanger Multi-Material Bit, 3/8 in. x 16 in. x 18 in.
- Note: For different bit diameters or lengths in the same SHOCKWAVE Bellhanger family, refer to Milwaukee's complete bit lineup
- Note: Always operate the bit within the manufacturer's recommended RPM and impact ratings, and use appropriate PPE for the material being drilled
