Description
Milwaukee SDS Max 4-Cutter 7/8 in. x 12 in. x 17 in.
Model Number: 48-20-3945
The Milwaukee 48-20-3945 is an SDS Max rotary hammer drill bit in 7/8 in. diameter with a 12 in. working length and 17 in. overall length — an extended-reach four-cutter configuration at the 7/8 in. specialty anchor diameter for structural through-wall penetrations and deeper anchor embedments requiring SDS Max energy with the four-cutter performance advantage in hard commercial concrete. The MX4-style four-cutter tip delivers four active carbide cutting contacts per revolution, maintaining drilling momentum through hard aggregate that would slow two-cutter progress at this large bore in dense commercial concrete. The 17 in. overall length provides working reach for thick structural concrete sections, multi-pour assemblies, and deeper anchor embedments at the 7/8 in. bore where the shorter standard configurations cannot reach the required depth from a single accessible drill position.
The 7/8 in. diameter serves specific structural connections where this bore size falls between the common 3/4 in. and 1 in. standard anchor sizes — engineering drawings for specific structural connections at this intermediate size require the 7/8 in. pilot hole for the anchor hardware specification. At 7/8 in. bore and 12 in. working length, Milwaukee’s four-cutter flute geometry must maintain effective concrete debris transport through the extended working depth while the four cutting faces generate chip volume at a higher rate than standard two-cutter bits. The SDS Max shank provides positive anti-rotation locking and maximum impact energy transmission.
See Milwaukee’s complete SDS Max four-cutter catalog for all available 7/8 in. configurations.
Features
- 4-cutter tip for faster speed and longer life at 7/8 in. in hard commercial concrete
- 17 in. overall for thick structural walls and deeper embedment applications
- SDS Max for maximum impact energy at this large bore in demanding concrete
- 7/8 in. for specific structural connections between 3/4 in. and 1 in. sizes
- Optimized fluting for debris evacuation through full 12 in. working depth
Specifications
- Diameter: 7/8 in.
- Working Length: 12 in.
- Overall Length: 17 in.
- Tip: 4-Cutter Carbide
- Shank: SDS Max
Includes
- (1) Milwaukee 48-20-3945 SDS Max 4-Cutter 7/8 in. x 12 in. x 17 in.
