42012 - Pferd POLICAP Holder Shape C 9/32 Dia x 1/8 Shank

Precision Finishing with the Pferd 42012 POLICAP Holder

The Pferd 42012 POLICAP Expanding Rubber Holder is a specialized accessory designed to maximize the performance of POLICAP abrasive caps. Engineered for the demanding environments of tool and mold making, this holder features a robust rubber head molded onto a precision steel shank. The Shape C geometry—cylindrical with a radius end—is particularly valuable for technicians who need to finish complex contours, fillets, and concave surfaces where a sharp corner would dig in or fail to conform.

At the core of this tool's functionality is its expanding rubber design. When the tool is rotated at operating speeds, the centrifugal force causes the rubber head to expand slightly, creating a firm, slip-free grip on the abrasive cap. This ensures that the abrasive media remains stable during grinding, providing a consistent finish and preventing the cap from detaching under load. The 1/8-inch shank is ground to tight tolerances, ensuring compatibility with standard pneumatic and electric die grinders while minimizing runout and vibration. This attention to concentricity is crucial for fine detail work, as it reduces operator fatigue and prevents chatter marks on the workpiece.

The Pferd POLICAP system is renowned for its seamless abrasive caps, which allow for grinding close to edges and in confined spaces without the risk of seam marks. The 42012 holder is the essential link in this system, providing the backing support necessary for effective material removal and surface blending. Whether you are deburring machined parts, blending welds in tight corners, or polishing mold cavities, this holder provides the control and durability required for professional results. Its reusable nature makes it a cost-effective solution for high-volume finishing operations.

Key Applications

• Tool and Die: Finishing complex mold geometries and radii.


• Aerospace: Blending and polishing turbine blades and engine components.


• General Fabrication: Deburring holes and finishing internal contours.