Switch sanding grits in a single second, eliminate rotary slip during aggressive stock removal, and maintain true rotational balance at speeds up to 30,000 RPM. Engineered specifically for professional goldsmiths, dental technicians, and bench jewelers, the MOORE® Snap-On Mandrel (3/32" Shank / 2.35 mm) is the dedicated rotary driver for all brass-center snap-on abrasive discs.
Manufactured from hardened, high-grade steel with corrosion-resistant nickel plating, this precision mandrel features an integrated square-drive retention head with a split-prong expansion slot. The square shoulder interlocks directly with the punched square brass eyelet of E.C. Moore Adalox discs, Yellow BC discs, and Blue BC discs, providing positive mechanical engagement that prevents discs from spinning freely on the hub under load. With its standard 3/32" (2.35 mm) shank, the mandrel fits all major rotary handpieces, flexible shaft systems (Foredom), and brushless micromotors. Whether mounted grit-outward for direct contouring or grit-inward for underside access, this mandrel delivers steady, chatter-free performance across gold, silver, platinum, brass, and composite materials.
Why Choose the MOORE® 3/32" Snap-On Mandrel
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Positive Square-Drive Engagement: The precision-machined square head seats firmly inside the square eyelet of brass-center discs, eliminating free-spinning slippage during heavy edge-grinding.
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Instant Snap-On Snap-Off™ Action: Discs snap into place over the split-lug retention head in seconds without requiring screwdrivers, wrenches, or threaded locking screws.
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Corrosion-Resistant Nickel Plating: Durable electro-plated nickel barrier shields the hardened steel core against bench moisture, sweat, and corrosive polishing debris.
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True Concentricity & Zero Wobble: Precision-ground shank minimizes radial runout, preventing handpiece chatter and ensuring smooth finishing across small jewelry components.
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Universal 3/32" (2.35 mm) Bench Standard: Drops directly into standard quick-change handpieces, 3-jaw chucks, and dental lab rotary chucks.
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Reversible Disc Mounting Support: Engineered to seat discs securely facing forward for push-sanding or facing backward for pull-strokes and inside curves.
Technical Specifications
| Brand Authority | MOORE® (Compatible with E.C. Moore System) |
| Product Type | Miniature Rotary Snap-On Mandrel |
| Shank Diameter | 3/32 in (2.35 mm) Universal Shank |
| Drive Mechanism | Positive-Lock Square Drive with Expansion Slot |
| Material Core | Hardened Tool Steel |
| Surface Finish | Corrosion-Resistant Bright Nickel Plating |
| Disc Compatibility | Brass Metal-Center Discs (Moore Adalox, Yellow BC, Blue BC) |
| Rotary Compatibility | Flex Shaft Handpieces, Micro Motors, Dremel (with 3/32" collet) |
| Recommended Operating Range | 10,000 to 20,000 RPM |
| Maximum Speed Rating | 30,000 RPM |
Free Global Shipping
We process orders within 1-3 business days. Estimated standard international delivery is 6-12 business days.
14-Day Returns
We have a 14-day return policy. Items must be unused, with all original accessories, and in original packaging.
For full details, please refer to our Shipping and Refund policies at the bottom of the page.
