Diamond Diamond Core Drill Bit – Concrete Drilling Machine

Johnson Tools JS-250 CE Industrial Heavy-Duty Diamond Core Drill Machine | 250mm Capacity

In municipal pipe routing, bridge structural testing, and major commercial renovations, underpowered drill motors and rig vibration lead to shattered core bits and severe project delays. The Johnson Tools JS-250 Heavy-Duty Coring Machine is engineered for the most brutal concrete drilling environments. Powered by a massive 4580W high-torque motor and mounted on a rigid drill stand, it effortlessly drives core bits up to 250mm (10 inches) in diameter. CE-certified for industrial safety and featuring an integrated water cooling source, this machine is the ultimate reliable power platform for professional contractors and heavy equipment rental fleets.

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Technical Parameter	Specification Details
Target Materials	Reinforced Concrete, Granite, Engineered Stone, Masonry
Thermal Management	High Heat-Resistant Bond Matrix (Prevents Graphitization)
Dimensional Accuracy	Minimal Runout Tolerance for Clean, Chip-Free Holes
Segment Integrity	High-Grade Bond Formulation for Extreme Stress
Operating Conditions	Intensive Dry or Wet Drilling

4580W Extreme Torque Delivery:

Equipped with a commercial-grade motor delivering a consistent 600 r.p.m. under heavy load. It generates relentless cutting torque to slice cleanly through heavily reinforced concrete and thick steel rebar without stalling, drastically reducing your time-per-hole.

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- Rigid Construction for Absolute Precision: Weighing in at a solid 33Kg, the heavy-duty cast-iron base and reinforced guide column provide unmatched physical ballast and structural rigidity. This completely eliminates rig deflection and high-frequency vibrations during deep, large-diameter coring—preventing bit binding and ensuring perfectly cylindrical holes.
- Integrated Water Source System: Optimized for continuous wet drilling, the spindle-integrated water delivery system flushes coolant directly to the cutting zone. This rapidly dissipates friction heat, exponentially extends diamond core bit lifespan, and flushes abrasive slurry to maintain peak penetration rates.
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