Milwaukee 48-03-3565 18 in Spline Thick Wall Core Bit Adapter

Product Description

The MILWAUKEE 48-03-3565 is an 18-inch spline shank adapter designed for use with thick wall core bits. It provides extended reach in confined or hard-to-access drilling locations, making it a practical tool for masons, concrete contractors, and electricians who core through block, brick, or concrete in tight spaces. The adapter ships as a shank-only component and connects standard thick wall core bits to compatible rotary hammer or core drill drive systems. At 3.05 pounds, it is built for jobsite durability without adding excessive weight to the setup.

This adapter is suited for commercial and residential construction applications where extended core bit reach is required. Typical use cases include drilling through thick concrete walls, masonry block, or structural slabs where standard-length setups cannot access the full depth or angle needed. It is particularly useful when working around obstructions or inside mechanical chases, electrical rooms, and utility corridors where drill clearance is limited.

Key Features

• 18-inch spline shank extends reach into tight and deep drilling locations
• Designed for thick wall core bits requiring spline drive connection
• Shank-only design allows pairing with existing core bit inventory
• At 3.05 pounds, adds minimal weight to the overall core drilling setup
• Supports deeper core drilling where standard-length adapters fall short

Compatibility

Designed for use with MILWAUKEE thick wall core bits requiring an 18-inch spline adapter connection. Consult the core bit and drive tool documentation to confirm spline drive compatibility before installation.

Installation Notes

This adapter is typically installed by experienced masons, concrete drilling contractors, or licensed tradespeople familiar with rotary hammer and core drill equipment. Ensure the core drill is powered off and unplugged before attaching or removing the adapter. Verify that the spline connection is fully seated and secured according to the drive tool manufacturer's instructions before beginning any core drilling operation. Follow all applicable jobsite safety protocols when operating core drilling equipment in concrete or masonry.

Technical Specifications

• Length: 18.65 inches
• Width: 2.1 inches
• Height: 2.1 inches
• Weight: 3.05 pounds
• Drive Type: 18-inch spline
• Includes: Shank only
• Sold As: Each
• UPC: 0045242086894

Standard Information

• Brand: MILWAUKEE
• Manufacturer Part Number: 48-03-3565