Dia. 12-20mm Felt Bobs 3mm shank Mounted Polishing Grinding Heads for Mold Jewelry Handicrafts Mirror Finish

Technical Specifications

• Head Diameter: 12 mm, 14 mm, 16 mm, 18 mm, 20 mm
• Shank Diameter: 3 mm (1/8") universal rotary tool shank
• Head Geometries: Cylinder (T-shape) & Bullet / Pointed Tree (C-shape)
• Abrasive Material: Premium Compressed Natural Wool Felt & Carbon Steel Mandrel
• Sanding Application: High-Gloss Buffing, Mirror Finishing, Precision Lapping
• Suitable Materials: Gold & Silver Jewelry, Precision Molds, Stainless Steel, Brass, Glass, Ceramics
• Density: Medium-Soft resilient elasticity

Key Features

• High-Density Natural Wool: Manufactured from fine-grade compressed wool fibers for high wear resistance, uniform density, and zero shedding.
• Compound Retention: Porous wool matrix holds diamond lapping paste, polishing rouge, and buffing compounds securely during high-speed rotation.
• Precision Profile Finishing: Dual shape profiles (cylindrical for flats and bullet-shaped for concave curves, corners, and internal cavities) provide thorough surface coverage without rounding sharp edges.
• True-Running Balance: Concentrically bonded 3 mm steel shanks run smoothly with minimal vibration in die grinders, Dremel rotary tools, and flexible shafts.

Applications & Usage Recommendations

Engineered for fine polishing in mold and die maintenance, jewelry fabrication, watchmaking, dental laboratory work, optical glass prep, and non-ferrous metal buffing. For best results, use with matching diamond polishing compound or green rouge paste at 5,000 to 15,000 RPM.