SDS Max 4CT MX4™ 1-1/4" X 31" X 36"

The Milwaukee SDS-MAX 4CT MX4™ 1-1/4" x 31" x 36" is a large-diameter, ultra long-reach rotary hammer drill bit built for deep concrete drilling and through-structure applications. This is one of the most extreme configurations in the MX4 lineup—designed for situations where both depth and diameter push tools to their limits.

Performance & Design

• Solid carbide 4-cutter head
  Designed for maximum durability in reinforced concrete, delivering significantly longer life when drilling through rebar
• 4-cutter geometry
  Prevents binding and lock-up when hitting steel, maintaining drilling momentum in deep holes
• Rebar guards
  Protect cutting edges in hard aggregate and embedded metal
• Centering tip
  Improves accuracy at hole start, critical for long, deep drilling alignment
• Variable flute design
  Enhances dust removal, which is especially important in deep holes to prevent overheating and slowdown
• Breaker points
  Help pulverize material for faster drilling speeds and reduced load on the tool

Size & Capacity

• Diameter: 1-1/4"
• Usable cutting length: 31"
• Overall length: 36"
• Shank: SDS-Max (large rotary hammers only)

Ideal For:

• Through-wall and through-slab drilling
• Deep anchor hole installations
• Structural and seismic anchoring
• Infrastructure and commercial construction
• Mechanical, electrical, and plumbing penetrations