Product Description
Milwaukee 4-1/2 in. x 12 in. Diamond Core Bit Extension
Model Number: 48-17-4045
The Milwaukee 48-17-4045 is a 4-1/2 in. x 12 in. Diamond Core Bit Extension — a large-diameter barrel extension shaft that adds 12 in. of additional working depth for Milwaukee 4-1/2 in. diamond core bits for through-penetrations in thick concrete walls where the standard barrel length cannot reach from a single accessible drill position. The 4-1/2 in. diameter specification matches the 4-1/2 in. core bit's barrel outer diameter and connection interface — core bit extensions are dimension-specific and must match the specific core bit's barrel geometry for the concentric, secure coupling that maintains hole accuracy through the full extension depth. At the 4-1/2 in. large diameter, the extension must transmit the substantial rotational force and manage the large slurry volume generated by the 4-1/2 in. drilling process through the 12 in. extension length without compromise.
Milwaukee precision-machines the extension's coupling interface for accurate concentricity between the core bit barrel and the extension — eccentricity at the coupling produces hole diameter variation at the cutting face, particularly significant at this large diameter where small errors at the coupling are magnified at the cutting radius. The extension is used with abundant, continuous wet cutting for segment cooling and slurry evacuation through the full extended system. Verify that the extension's barrel diameter and connection interface match your specific Milwaukee 4-1/2 in. core bit model before ordering.
See Milwaukee's complete core bit extension lineup for all available diameters and lengths for Milwaukee diamond core bit systems.
Features
- 4-1/2 in. extension matched to 4-1/2 in. Milwaukee diamond core bit barrel geometry
- 12 in. additional depth for through-penetrations in thick structural concrete walls
- Precision-machined for concentric rotation at this large-diameter extension coupling
- Abundant continuous wet cutting essential for 4-1/2 in. cooling through full system depth
- Verify 4-1/2 in. core bit model compatibility before ordering
Specifications
- Barrel Diameter: 4-1/2 in.
- Extension Length: 12 in.
- Compatible Bits: Milwaukee 4-1/2 in. Diamond Core Bits (verify model)
Includes
- (1) Milwaukee 48-17-4045 4-1/2 in. x 12 in. Diamond Core Bit Extension
