4.25" Diamond Core Drill Bit 5/8-11 Thread – Concrete & Marble
4.25" Diamond Core Drill Bit 5/8-11 Thread – Concrete & Marble
4.25-Inch Diamond Core Drill Bit with Positioning Bit — 5/8-11 Thread
Take on tough masonry jobs with confidence. This heavy-duty 4.25-inch (108mm) diamond core drill bit is engineered for fast, clean hole-cutting through concrete, brick, and marble. Whether you're installing air conditioning units, running plumbing lines, or fitting balustrades, this coring bit delivers professional-grade performance in a DIY-friendly package. Made in Mainland China.
Key Features
- Universal 5/8-11 Thread: Compatible with standard fixed coring machines and handheld drill presses — quick assembly, no adapters needed.
- Premium Alloy Steel & Diamond Construction: High-grade alloy steel body with bonded diamond abrasive grains for extended cutting life and outstanding wear resistance.
- High-Efficiency Design: Chip evacuation holes, precision-machined serrations, and a concentric shaft design work together for smooth, fast cutting with minimal effort.
- Wet & Dry Drilling: Fully compatible with both wet and dry drilling methods, and supports vertical drilling for greater versatility on the job site.
- Wide-Range Applications: Ideal for concrete, brick, and marble — perfect for HVAC installations, plumbing, architectural features, and general construction.
Specifications
| Item Type | Diamond Core Drill Bit |
| Material | Alloy Steel with Diamond Abrasive |
| Thread | 5/8-11 |
| Drill Diameter | Approx. 108mm / 4.25 in |
| Overall Length | Approx. 240mm / 9.5 in |
| Certification | CE |
| Country of Origin | Made in Mainland China |
What's in the Box
- 1 × Diamond Core Drill Bit
- 1 × Positioning Bit
- 1 × Hex Wrench
- 1 × Saw Blade
- 1 × Gasket
Safety & Best Practices
Always wear appropriate personal protective equipment (PPE) — including safety glasses, gloves, and hearing protection — when operating core drill bits. For guidance on safe tool use, visit the OSHA Tools & Equipment Safety resource.
Frequently Asked Questions
Q: What materials can this 4.25-inch diamond core drill bit cut through?
A: This diamond core drill bit is designed to cut through concrete, brick, and marble. Its diamond abrasive construction makes it highly effective on hard masonry materials commonly encountered in construction and renovation projects.
Q: Can I use this core drill bit with a standard handheld drill?
A: Yes. The 5/8-11 universal thread is compatible with most standard handheld drill presses and fixed coring machines, making it straightforward to attach without needing special adapters.
Q: Is wet or dry drilling recommended with this bit?
A: This bit supports both wet and dry drilling methods. Wet drilling helps manage heat and debris during extended cuts, while dry drilling offers added convenience for quick jobs. Choose the method that best suits your project and equipment setup.
Q: What common applications is this core drill bit used for?
A: It is commonly used for installing air conditioning units, running plumbing lines, fitting balustrades, and general building construction where large, clean holes need to be drilled through masonry materials.