NEO TOOLS 57-899 Diamond Core Drill Extension Rod 555 mm for 58G540

For professionals who need to reach deeper when diamond core drilling, the NEO TOOLS 57-899 extension rod adds 555 mm of reach to your GRAPHITE 58G540 core drill machine. Instead of being limited to standard bit depths, you can now drill through thicker walls, foundations, and reinforced concrete sections without changing your setup. The rod is built from high-grade steel with a robust, heavy-duty construction that stands up to wet and dry drilling conditions. Its 1 1/4" UNC threads ensure a secure, wobble-free connection between the machine spindle and your diamond core bit, so every rotation transfers power efficiently. Whether you are extending an existing hole or starting a deep bore, this extension keeps the bit aligned and reduces vibration for cleaner cuts. The metallic/black finish resists corrosion, making it suitable for demanding job sites. Installation is simple: screw the female end onto the machine and the male end into the core bit, then drill as usual. With an approximate outer diameter of 40 mm, the rod maintains rigidity even under high torque. This is not just an accessory—it is a practical upgrade that expands the capability of your core drill without buying a longer machine.

Highlights

• Extends drilling depth by 555 mm for diamond core bits
• Compatible with GRAPHITE 58G540 core drill machine
• 1 1/4" UNC female to male thread connection
• High-grade steel construction for heavy-duty use
• Corrosion-resistant metallic/black finish
• Screw-on installation, no tools required
• Suitable for wet and dry diamond core drilling

In daily use

On a typical job, you might need to core through a 400 mm reinforced concrete wall. With a standard core bit, you would have to stop, remove the bit, and switch to a longer one—if you have one. The 57-899 eliminates that downtime. Attach it once, and your existing bits gain the extra length needed for deep holes. The rod's rigid steel body minimizes flex, so the bit stays centered and cuts straight, reducing the risk of binding or bit damage. After use, simply unscrew it and store it in your tool case. Because it is made from corrosion-resistant steel, you can rinse it off after wet drilling without worrying about rust. The threads are precisely machined to UNC standard, ensuring a tight fit that does not loosen under vibration. This extension rod is a cost-effective way to increase the versatility of your core drill, making it ideal for contractors, electricians, plumbers, and HVAC installers who regularly face deep drilling tasks.

Full specifications

• Product type: Core drill extension rod
• Brand: NEO TOOLS
• Model: 57-899
• MPN: 57-899
• EAN: 5906692012893
• Length: 555 mm
• Machine connection thread: 1 1/4" UNC female
• Core bit connection thread: 1 1/4" UNC male
• Material: High-grade steel
• Outer diameter (approx.): 40 mm
• Application: Diamond core drilling (wet & dry)
• Thread standard: UNC (Unified National Coarse)
• Construction: Robust, heavy-duty
• Installation: Screw-on
• Corrosion resistance: Yes
• Colour: Metallic / Black

Final note

With the NEO TOOLS 57-899, you are not just buying an extension rod—you are investing in the flexibility to tackle deeper drilling jobs with confidence. Its solid build and precise threading make it a reliable addition to your core drilling kit.