Diamond Products

The matrix bond holds the diamond particles in place and wears down at a controlled rate during cutting:

• Soft-Bond Matrix: Designed for cutting hard, non-abrasive materials like dense cured concrete, quartz, or granite. The soft metal matrix erodes quickly to shed dull, worn diamonds and continuously expose sharp new diamond edges, preventing segment glazing.
• Hard-Bond Matrix: Formulated for soft, highly abrasive materials like fresh green concrete, asphalt, cinder block, or brick. The hard metal matrix resists severe slurry erosion, holding the diamond particles tightly to ensure maximum blade wear life.

Diamond Products core bits utilize standard industry thread geometries based on barrel diameter:

• 5/8"-11 Threaded Arbors: Standard on smaller core bits ranging from 5/8-inch up to 1-1/2 inch outer diameter, making them compatible with handheld core drills and rotary hammer adapters.
• 1-1/4"-7 Threaded Arbors: The universal industrial standard for core bits 2 inches in diameter and larger, designed to mount directly onto heavy-duty Core Bore rig motors and large hydraulic drill heads.

Selecting between wet and dry core drilling methods depends on material hardness and site slurry rules:

• Wet Coring: Essential when drilling through hard cured concrete, heavy rebar, stone, or deep wall penetrations. Continuous water flow cools the diamond segments, flushes out dense concrete slurry, and prevents thermal degradation of the silver-brazed segment joint.
• Dry Coring: Designed specifically for drilling soft masonry block, brick, or unreinforced light concrete where water containment is impossible (e.g., finished indoor commercial spaces or active electrical rooms). Dry bits feature laser-welded segments and air-vented barrels to dissipate friction heat.

The Heavy Duty Orange (HOL) line is Diamond Products' benchmark general-purpose wet core bit series:

• Material Versatility: Engineered with a versatile medium-hard segment bond optimized for drilling through light to moderate steel rebar embedded in standard aggregate concrete.
• Segment Design: Features crown-style segments on small diameters and rooftop/v-notch segments on larger diameters to facilitate rapid bit centering and fast initial bit penetration without walking across the concrete surface.

A vacuum base system secures the core rig stand tightly to flat concrete floors without requiring mechanical concrete anchors:

• The rig base features an integrated rubber perimeter seal gasket.
• An external electric vacuum pump pulls a continuous deep vacuum underneath the base plate, sealing the stand to smooth concrete floors with over 1,000 lbs of holding force.
• This enables rig setups in finished buildings or slab surfaces where drilling mechanical anchor expansion holes is prohibited.

To keep core bits cutting efficiently and extend barrel lifespan:

• Regulate Water Flow: Use enough water to flush out a light milky slurry. Too much water flushes away abrasive particles needed to wear the matrix, causing bit glazing; too little water creates a thick paste that bogs down the motor.
• Dressing a Glazed Bit: If the bit slows down and glazes over, make several short cuts into an abrasive material (like cinder block or an abrasive dressing stone) to strip back the metal matrix and re-expose fresh diamond grit.
• Maintain Alignment: Ensure the rig column is locked square and rigid. Rig movement causes the barrel to rub against the side walls of the hole, leading to bound bits and bent shanks.

As an authorized stocking trade distributor and commercial tooling supplier, Ohio Power Tool carries a comprehensive portfolio of Diamond Products equipment. We maintain deep regional field stock on Diamond Products Heavy Duty Orange (HOL) wet core bits, Hyper Core bits, dry masonry core bits, Core Cut diamond blades (14" to 36"), Core Bore rig motors, stands, and vacuum pump kits to keep your core drilling, sawing, and utility crews operating at peak capacity.