Product Description
Milwaukee SDS Max 4CT 5/8 in. x 12 in. x 17 in. Rotary Hammer Bit
Model Number: 48-20-3917
The Milwaukee 48-20-3917 is an SDS Max 4-Cutter (4CT) Rotary Hammer Bit in 5/8 in. diameter with a 12 in. working length and 17 in. overall length — a premium heavy-duty extended-length SDS Max concrete bit combining the 4CT four-cutter tip technology with the high-energy SDS Max platform and extended working depth for demanding commercial structural anchor drilling in hard concrete. Milwaukee's 4CT four-cutter tip uses four active carbide cutting edges simultaneously engaging the concrete surface with each rotation — compared to the standard two-cutter geometry used in conventional SDS Max bits, the four-cutter doubles the cutting contacts per revolution to deliver faster penetration rate and distributes cumulative carbide wear across twice the surface area for extended bit life. These performance advantages are most significant in the hard, high-strength commercial concrete where SDS Max hammers are deployed and where the higher drilling resistance amplifies the speed and life difference between two-cutter and four-cutter tip geometries.
The SDS Max shank is the highest-energy professional rotary hammer standard, transmitting the maximum impact energy available in rotary hammer tooling to the four-cutter carbide tip — the combination of SDS Max energy delivery and 4CT cutting efficiency produces the fastest available drilling speed in hard commercial concrete for the 5/8 in. diameter. The 17 in. overall length provides the extended reach needed for through-wall penetrations in CMU with additional finish thickness, deep structural anchor embedments specified for high pull-out ratings, and drilling positions where the hammer cannot be positioned close to the wall surface due to structural obstacles. Optimized flute geometry maintains efficient debris evacuation through the full 12 in. working depth for uninterrupted production drilling at this extended length and large diameter combination.
See Milwaukee's complete SDS Max 4CT bit lineup for all available diameters and lengths in the premium four-cutter format designed for the most demanding commercial concrete drilling work.
Features
- SDS Max 4CT four-cutter tip for maximum drilling speed and extended life in hard concrete
- Four cutting edges double contacts per revolution vs. standard 2-cutter SDS Max bits
- 17 in. overall length for deep embedment and extended through-wall penetrations
- SDS Max energy delivery for productive drilling in high-strength commercial concrete
- Optimized fluting for continuous debris ejection through full 12 in. working depth
Specifications
- Diameter: 5/8 in.
- Working Length: 12 in.
- Overall Length: 17 in.
- Shank: SDS Max
- Tip: 4CT Four-Cutter Carbide
Includes
- (1) Milwaukee 48-20-3917 SDS Max 4CT 5/8 in. x 12 in. x 17 in. Rotary Hammer Bit
