Product Description
Milwaukee SDS Max 4CT 1/2 in. x 24 in. x 29 in. Rotary Hammer Bit
Model Number: 48-20-3905
The Milwaukee 48-20-3905 is an SDS Max 4-Cutter (4CT) Rotary Hammer Bit in 1/2 in. diameter with a 24 in. working length and 29 in. overall length — an extended ultra-deep-reach SDS Max bit for structural anchor drilling, through-slab penetrations, and foundation work where the required hole depth significantly exceeds what standard and typical extended-length bits can reach from the accessible drilling position. The 29 in. overall length enables drilling through very thick concrete sections, making through-penetrations from the surface through deep foundations and thick structural slabs, and completing deep embedment anchor installations where structural engineers specify long embedment depths for the highest pull-out load ratings in critical connections. Milwaukee's 4CT four-cutter tip technology maintains the performance advantages of four cutting contacts per revolution versus the two-cutter standard — faster penetration rate and extended bit life from doubled carbide wear distribution — even through the full 24 in. working depth of this extended configuration.
The SDS Max shank delivers the maximum rotary hammer impact energy available to the 4CT four-cutter carbide tip, providing the driving force to maintain productive drilling speed in hard high-strength commercial concrete through the extended working depth where drilling resistance accumulates with depth. Milwaukee's flute engineering for this extreme-length bit maintains effective concrete debris evacuation from the base of the hole through the full 24 in. working depth — the flute pitch, volume, and geometry are specifically calibrated for the 1/2 in. diameter at this working length to transport pulverized concrete continuously to the surface without hole packing that would halt drilling progress. This is a specialty procurement bit for structural and civil contractors who work with the deepest anchor installations and through-penetrations in commercial structural construction.
See Milwaukee's complete SDS Max 4CT lineup for all available diameters and lengths — for even greater working depth, see the 60 in. overall version (48-20-3909) for the deepest available standard configuration.
Features
- SDS Max 4CT four-cutter tip for maximum performance through 24 in. working depth
- 29 in. overall length for very thick slabs, deep foundations, and long embedment anchors
- SDS Max energy delivery maintains productive speed in hard concrete at extreme depth
- Flute engineered for continuous debris evacuation through full 24 in. working depth
- 1/2 in. diameter for common structural anchor systems at extreme embedment depths
Specifications
- Diameter: 1/2 in.
- Working Length: 24 in.
- Overall Length: 29 in.
- Shank: SDS Max
- Tip: 4CT Four-Cutter Carbide
Includes
- (1) Milwaukee 48-20-3905 SDS Max 4CT 1/2 in. x 24 in. x 29 in. Rotary Hammer Bit
