Screw Mandrel

The Heavy-Duty Steel Rotary Screw Mandrel Series provides a rugged, true-running anchoring solution designed to mount unmounted polishing wheels, silicone discs, miniature edge wheels, rubber points, and cotton buffs securely.

Machined from high-tensile industrial tool steel and corrosion-resistant stainless steel, these rigid mandrels are engineered to handle the continuous twisting torque generated by professional flexible shaft machines and high-velocity jewelry micromotors. Featuring a reinforced terminal screw head paired with a tight stabilizing washer system, this series ensures your unmounted rotary wheels remain perfectly centered with zero tracking wobble, preventing vibration chatter marks across your final alloy finishes.

Key Product Features

• Reinforced Flat-Head Screw Mechanics: Built with heavy-duty threads designed to hold tight under pressure, preventing accidental disc spin or slip loops during aggressive material roughing.

• Dual-Friction Backing Washer Layout: Features pre-fitted compression washers beneath the screw head to distribute clamping force evenly, protecting fragile silicone matrices from cracking under tension.

• True-Ground Linear Shank Tracking: Precision-calibrated to spin dead-center within standard professional jewelry, laboratory, and dental collet systems.

• Durable Multi-Material Metallurgies: Available in standard high-tensile tool steel for maximum rigidity or high-grade stainless steel to resist rust and moisture contamination in clinical laboratory environments.