Kolekcja: Diamond Concave Wheels

Professional diamond concave grinding wheels for shaping curved surfaces, cabochon domes, and contoured stone profiles. The concave wheel profile allows precise control over the curvature of cabochons and sculptural stone work — essential for lapidary artists producing consistent dome shapes, beads, and curved gem surfaces. Available in 6" and 8" diameters with multiple profile radii. Always use with water cooling.

Available Sizes & Pricing

Grit Selection Guide

Compatible Applications

• Lapidary cabochon dome shaping — agate, jasper, quartz, turquoise, opal
• Curved surface grinding on decorative and semi-precious stone
• Stone bead exterior profile shaping
• Sculptural stone carving — interior curved surfaces
• Glass curved surface grinding for decorative art glass
• Fits standard 5/8", 3/4", and 1" arbor bench grinders and lapidary machines

Related Tools

• Diamond Convex Carving Wheels — Convex profile wheels for groove and channel carving
• Diamond Spherical Grinding Wheels — Radius wheels for consistent dome profiles
• Diamond Resin Soft Grinding Wheels — Flexible wheels for cabochon dome shaping
• Diamond Smoothing Pads — Pre-polish pads after 600 grit concave wheel
• Felt Polishing Pads — Final polish with diamond compound on shaped cabochons
• Diamond Grinding Wheels — Full range of diamond grinding wheel profiles

Frequently Asked Questions

• Q: What is a concave wheel used for in lapidary?
  A: Concave wheels are used to grind the curved dome profile of cabochons and to shape the interior curves of stone carvings. The curved wheel surface matches the desired curvature of the finished stone, producing consistent, repeatable dome shapes across multiple cabochons.
• Q: How do I select the right profile radius for my cabochon work?
  A: Choose a profile radius that matches or is slightly larger than the desired dome curvature of your cabochon. A smaller radius (1") produces a higher, more pronounced dome; a larger radius (3") creates a flatter, wider curve. Match the radius to the stone size and desired dome height.
• Q: What is the difference between a concave wheel and a spherical grinding wheel?
  A: Both shape curved surfaces, but a concave wheel has a fixed inward profile radius suited for consistent dome shaping on specific cabochon sizes. A spherical (radius) wheel has a rounded face profile that works across a broader range of dome curvatures. Concave wheels offer more precise radius control; spherical wheels are more versatile across different stone sizes.
• Q: Should diamond concave wheels be used wet?
  A: Yes — always use water when grinding with diamond concave wheels. Wet grinding prevents overheating, extends wheel life, and produces a cleaner surface finish on the stone. Never run diamond wheels dry.
• Q: What grit sequence should I use for cabochon dome shaping with concave wheels?
  A: Start with 60–80 grit for aggressive dome forming and initial profile shaping, progress to 120–220 grit to refine the dome and remove coarse scratches, then 280–600 grit for fine surface smoothing before moving to diamond smoothing pads or resin pre-polish pads.