4-in-1 Diamond Beveling Chamfer Bit, Diamond Chamfering Bit for Grinder

Key features

• 4-in-1 Diamond Beveling Chamfer Bit — Drilling, Enlarging, Chamfering & Polishing: Used for creating, enlarging, and finishing holes in porcelain tile, ceramic, granite, and marble with a single tool. This diamond chamfering bit for grinder integrates a diamond hole saw for opening holes, a cylindrical section for enlarging, and a chamfering edge for surface finishing. The 4-in-1 design allows users to complete multiple steps without changing chamfer bits during the workflow — useful for kitchen countertop replacements, bathroom shower valve adjustments, and electrical conduit routing through stone surfaces
• Vacuum-Brazed Diamond Coating with Cooling Wax for Dry or Wet Use: Unlike standard diamond marble hole saw bits that may lose grit during operation, this diamond grinding bit utilizes a vacuum-brazed diamond coating that embeds diamond particles firmly onto the steel core, reducing grit loss during extended use. The high-density diamond grit is distributed evenly across the working surface for consistent material removal. Internal cooling wax is pre-embedded in the hole saw bit, allowing for dry drilling applications where water is not readily available — this helps reduce heat buildup during operation and supports both dry and wet use for flexibility on different job sites
• Tapered Profile Design for Precise Hole Sizing from 0.35" to 1.97" : The diamond chamfering bit for grinder features a tapered profile with a 1.97" (50mm) base diameter, 0.35" (9mm) top diameter, and 2.76" (70mm) overall height. This graduated design, combined with the diamond-coated surface, allows for precise hole sizing from 0.35" to 1.97" in diameter — whether you are enlarging existing holes in countertops, shower walls, or backsplash installations. The taper helps minimize friction and prevent binding during use, making it suitable for both new holes and existing cutouts
• Universal 5/8"-11 Thread, Fits Most Angle Grinders and Wet Polishers: Equipped with a standard 5/8"-11 threaded arbor, this diamond beveling chamfer bit mounts directly onto most standard angle grinders and wet polishers. The 5/8"-11 threads provide a secure connection, helping to maintain stability during high-speed operation on tile and stone surfaces. No additional adapters or complex installation steps are required — simply thread it on and the step cone drill bit is ready for use
• Simple Starting Technique for Cleaner Results in New Holes: For better results when starting a new hole, tilt the angle grinder chamfer bit at a 45-degree angle to carve a crescent-shaped pilot notch at low pressure, then gradually straighten to vertical while maintaining high speed. A gentle rocking motion during drilling helps clear debris and improves cutting speed
• Suitable for Contractors, Installers, and DIY Enthusiasts: This diamond hole saw drill bit is a practical addition to the toolkit of tile installers, countertop fabricators, plumbers, electricians, and general contractors who regularly work with porcelain, ceramic, marble, granite, and stone materials. It is also suitable for DIY homeowners undertaking kitchen or bath renovations who need a reliable diamond chamfering tool for upgrading countertops, showers, and backsplashes, or installing fixtures, plumbing lines, and electrical outlets through hard surfaces

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