Mini Grinding Stone 6.4mm Cone 3.2mm Shank
Shank Diameter: Ø3.2mm
Stone Diameter: Ø6.4mm
Shape: Cone
This Mini Grinding Stone is a precision-engineered abrasive accessory designed for detailed carving, internal deburring, and refining tight geometries. Featuring a 6.4mm cone-shaped head, this tool provides a slim, tapered profile that strikes the perfect balance between the ultra-fine reach of a micro-bit and the material-removal power of larger stones. It is particularly effective for smoothing out internal radii, cleaning up small castings, and tapering the edges of holes in hard materials.
The 6.4mm stone diameter allows the tool to fit into narrow channels and acute angles that larger bits cannot access, while the pointed tip offers pinpoint accuracy for localized grinding. This conical shape is ideal for "v-grooving" or creating precise countersinks in metals, glass, and ceramics. The high-quality abrasive grains are bonded to resist premature wear, ensuring that the stone retains its sharp, tapered edge even when subjected to the high-speed friction required for hardened steel or alloy work.
Equipped with a universal 3.2mm shank, this stone is compatible with almost all high-speed rotary tools, including Dremel models. The precision alignment between the 6.4mm head and the 3.2mm shank ensures a concentric, wobble-free rotation, which is critical for fine-detail work where a steady hand is required. This stability reduces user fatigue and prevents the tool from "jumping" out of delicate grooves, allowing for a professional, uniform finish on every workpiece.
Whether you are an artist working on a detailed sculpture, a gunsmith refining a small component, or a hobbyist cleaning up a 3D-printed part, this 6.4mm cone grinding stone is an indispensable tool. Its versatility makes it suitable for both aggressive material removal and light touch-ups, providing a smooth transition between rough grinding and final polishing in any workshop setting.
Application:
- Max rated RPM: 35 000 RPM
- Sharpening chisels, knife edges cutting tools and more.
- Removes sharp edges on cut metal parts.
- Refines contours in metal or stone.
- Removes rust, weld spatter, and surface coating.
- Ceramics: 20 000 - 30 000 RPM
- Glass: 20 000 - 30 000 RPM
- Stonework: 20 000 - 25 000 RPM
The shank of the rotary cutter is securely locked in place by fitting it in the corresponding collet or making use of a keyless chuck.
Rotation speed:
Most rotary tools have the benefit to adjust the rotation speed. Many tool bits that fit in rotary tools have a maximum speed setting. This can be found on the packaging.
All materials react differently to speed and will need the tool bit to rotate slower. It is recommended to start using accessories on the slower speed first, before increasing the speed as needed.
The diameter of the tool bit fitted also determines the rotation speed. The larger the diameter, the slower the speed. If the speed is set too high, it could bend the shank/shaft resulting in injury.
