Centering Pin for Thick Wall Core Bits

The Milwaukee Centering Pin for Thick Wall Core Bits is a precision alignment component used in SDS Max and Spline core drilling systems. Its job is to ensure the core bit starts centered, stable, and accurately positioned before full coring begins.

It is part of the standard three-piece thick-wall core setup:

• Core bit body
• Guide plate
• Centering pin (this component)

What the centering pin does

1. Aligns the core bit at startup

• Passes through the guide plate and core bit
• Locks the bit into a fixed center point
• Prevents wandering on smooth or uneven concrete

2. Stabilizes initial drilling

• Keeps the bit from “walking” during first contact
• Helps establish a clean, perfectly centered hole
• Critical for large diameter core bits (2"–6"+)

3. Works with guide plate system

• The guide plate provides surface stability
• The centering pin provides axis alignment
• Together they ensure a straight, controlled start

Compatibility

Designed for Milwaukee thick wall core systems, including:

• SDS Max core bit systems
• Spline core bit systems
• Core sizes typically from ~2" up to 5"+
  

Used with:

• Guide plates (matched by diameter)
• Core bit body
• SDS Max or Spline adapter shanks