Husqvarna Diamond Core Drill Bit 594101503 3-1/2 Inch B10 Vari-Drill (24 Inch Tube 1-1/4-7 Thread Laser Welded Reinforced Concrete Masonry Wet)

Husqvarna 594101503 3-1/2 Inch x 24 Inch B10 Vari-Drill Diamond Core Bit

The Husqvarna 594101503 is a 3-1/2-inch overall diameter wet diamond core drill bit engineered to bore continuous deep utility penetrations through hard reinforced concrete, rebar-embedded structural slabs, and masonry. Built with an extended 24-inch steel core barrel, this Silver-level B10 Vari-Drill series bit incorporates nine roof-top Z-Edge laser-welded diamond segments with a 0.40-inch segment height to facilitate immediate bit centering and smooth, vibration-free hole starting. Equipped with a standard 1-1/4-inch - 7 UNC threaded connection hub, it operates efficiently under continuous water cooling with professional core drill rigs like the Husqvarna DM 280 and DM 340, providing straight core extractions without using extension rods.

Best Used For:

• Commercial Utility & Plumbing Line Penetrations: Boring precise 3.5-inch clearance holes through thick concrete foundation walls and floor slabs for drain lines and conduit.
• Steel-Reinforced Concrete Coring: Penetrating heavy steel rebar mesh and hard-cured aggregate concrete structures without thermal glazing or segment shear.
• Deep Slab & Retaining Wall Drilling: Completing continuous 24-inch deep core extraction passes in structural masonry and concrete barriers in a single setup.

Key Performance & Safety Features

• Extended 24-Inch Core Tube Length: Extra-long barrel depth allows single-pass drilling through thick walls without adding mechanical extension rods.
• Z-Edge Roof-Top Segment Design: Specialized segment contour minimizes initial friction to deliver instant bit tracking, reduced chatter, and rapid cutting speed.
• Nine Laser-Welded Diamond Segments: High-integrity laser welding joins diamond cutting segments directly to the steel core barrel for maximum structural safety under high torque.
• 0.40-Inch Segment Height Matrix: Generous 10mm segment height with industrial diamond distribution provides extended service life and consistent speed.
• Standard 1-1/4"-7 UNC Thread Connection: Universal female thread hub fits directly onto standard commercial core drilling rig spindles.
• Wet-Only Coolant Operation: Designed for continuous water cooling to flush slurry, prevent bit binding, and preserve diamond matrix integrity.

What's Included

• (1) Husqvarna 594101503 3-1/2" x 24" B10 Vari-Drill Diamond Core Bit

Technical Specifications

Pro-Tip: Always maintain steady water feed pressure while coring through steel rebar to keep the bit face clean, prevent segment glazing, and wash heavy slurry out of the 24-inch barrel.