Collection: Water Swivel Adaptors

Professional water swivel adaptors for diamond core drills, hollow drill bits, and rotary drilling tools. The precision swivel bearing mechanism allows pressurized water or coolant to feed continuously through the center of the rotating drill bit — delivering targeted internal cooling and slurry evacuation directly to the cutting tip. Eliminates thermal cracking, extends core drill life, and produces clean, chip-free holes in stone, granite, marble, glass, ceramic, and porcelain tile. Available in 6mm, 10mm, and 12mm straight and tapered shank configurations, as well as 1/2" GAS industrial thread chucks with modular extension adaptors.

Available Sizes & Specifications

Key Advantages of Center-Feed Water Cooling

• Direct Cutting Edge Cooling: Delivers water directly inside the core cavity where heat concentrates, preventing diamond matrix glazing and thermal burning.
• Active Slurry Evacuation: Continuous water pressure forces abrasive rock and glass slurry out of the cut, preventing core binding and drill seizure.
• Deep Hole Capability: Enables clean drilling through thick slabs and blocks where external water spray cannot reach the bottom of the cut.
• Versatile Tool Compatibility: Adapts easily to benchtop drill presses, magnetic drill bases, and industrial milling spindles.

Compatible Drilling Applications

• High-speed drilling in hard granite, quartzite, basalt, marble, and engineered stone slabs
• Precision hole drilling in art glass, fused glass, bottles, ceramic tiles, and porcelain
• Lapidary gemstone core drilling for beads, cylinders, carvings, and specimen mounts
• Continuous production drilling setups requiring uninterrupted cooling without manual water dams

Related Tools

• Sintered Diamond Core Drills — Heavy-duty sintered core drills for deep stone drilling
• Diamond Core Drill Bits — Complete selection of electroplated and sintered core drills
• Diamond Wire Hollow Drill Bits — Micro hollow drills for fine lapidary gemstone work
• Sintered Diamond Burs & Drill Bits — Sintered carving and drilling tools

Frequently Asked Questions

• Q: Why do I need a water swivel adaptor for core drilling?
  A: Diamond core drills generate severe localized heat during stone and glass drilling. Without internal cooling, diamond matrix glaze, drill tips overheat, and glass or stone will crack from thermal shock. A water swivel adaptor introduces coolant through the hollow drill center directly to the cutting zone, flushing abrasive slurry and maximizing drill life.
• Q: How do I connect the water supply to the swivel adaptor?
  A: Connect standard flexible water tubing to the push-fit or barbed brass inlet on the swivel collar. The collar rides on internal water-sealed ball bearings, allowing the drill shaft to spin at high speed while the water hose remains stationary. A standard gravity-fed bottle or low-pressure water line provides ideal coolant delivery.
• Q: How do I choose the correct shank or thread size?
  A: Match the swivel shank to your machine chuck (standard drill presses typically take 6mm, 10mm, or 12mm straight shanks). Match the output mount or thread to your drill bit: 1/2" GAS is standard for commercial stone core bits, while straight collets secure standard cylindrical shanks.
• Q: What is the function of the optional extension adaptors?
  A: Extensions (35mm to 75mm) lengthen the effective reach of the swivel assembly, allowing core bits to penetrate deep stone blocks or reach into recessed surfaces without colliding with the swivel body or drill chuck.
• Q: Can a water swivel adaptor be used with a handheld power drill?
  A: Water swivels perform best in stationary drill presses or rigid drill stands where lateral stress on the internal water seals is minimized. If used with handheld drills, ensure the tool is held strictly perpendicular to avoid side load and premature seal wear.