Dia. 4-12mm Sesame Grinding Heads Rubber with Abrasives Polishing Wheels Dremel Die Grinder Rotary Tools

Technical Specifications

• Product Type: Elastic Rubber-Bonded Mounted Polishing Points ("Sesame" Grinding Heads)
• Head Diameters: 4 mm, 5 mm, 6 mm, 8 mm, 10 mm, 12 mm
• Head Geometries:
  • Cylinder Profile: Flat-top design engineered for flat surfaces, straight slots, square internal corners, and cavity bottoms.
  • Bullet / Conical Profile: Pointed tapered tip engineered for fine grooves, narrow crevices, concave recesses, and curved contours.
• Shank Diameter: Standard 3 mm (approx. 1/8") nickel-plated solid steel mandrel
• Matrix Construction: Resilient synthetic vulcanized rubber matrix uniformly infused with micro-abrasive grains
• Abrasive Material: Silicon Carbide / Aluminum Oxide micro-abrasive compounding
• Grit Distribution: P60 / P80 (10–12 mm), P100 / P120 / P150 / P180 (6–8 mm), P200 / P220 / P240 (4–5 mm)
• Sanding & Polishing Applications: Precision mold and die finishing, internal hole deburring, parting line blending, surface scratch removal, and pre-mirror metal buffing
• Suitable Workpiece Materials: High-carbon tool steel, mold alloy steel, stainless steel, cast iron, brass, bronze, aluminum alloys, jade, glass, and jewelry metals
• Machine Compatibility: Dremel tools, rotary die grinders, flexible shaft machines, bench drills, and high-speed rotary tools with 3mm collets
• Operating RPM: Recommended 5,000 – 15,000 RPM (Maximum 25,000 RPM; use light contact pressure for maximum lifespan)

Key Characteristics & Engineering Highlights

• Elastic Cushioning Action: Flexible rubber matrix absorbs high-frequency micro-chatter, preventing gouging, chatter marks, or dimensional distortion on sensitive workpieces.
• Self-Dressing Consistent Cut: Micro-abrasive grains are uniformly distributed through the entire rubber body, providing continuous cutting and smoothing action throughout product life.
• Low Dust & Controlled Friction: Generates significantly lower airborne dust and frictional heat compared to vitrified ceramic grinding stones.
• Concentric Steel Mandrel: Precision-ground 3mm shank ensures high rotational concentricity and minimal runout at elevated spindle speeds.

Recommended Workshop Applications

• Precision Mold & Tool Making: Removing EDM spark erosion textures, machining tool marks, micro-burrs, and repairing injection molds and stamping dies.
• Machining Deburring: Internal bore chamfering, cross-hole deburring, small gear teeth finishing, and precision hydraulic valve cleanup.
• Jewelry & Lapidary Finishing: Fine smoothing and pre-polish finishing on jade, agate, gold, silver, brass, and stainless steel crafts.