12D821 - Walter W-225 Vitrified Mounted Point for Steel and Cast Iron

Precision Grinding for High-Tensile Alloys

The Walter W-225 Mounted Point (SKU: 12D821) represents the pinnacle of abrasive engineering for precision metalworking. Designed specifically to address the challenges of machining and finishing tough steel, tool steel, and high-tensile alloys, this mounted point is an essential consumable for tool and die makers, machinists, and fabricators requiring exacting standards. Unlike generic abrasive points that may suffer from eccentricity or inconsistent grain structure, Walter Surface Technologies has manufactured this product with a focus on perfect balance and structural integrity.

At the core of its performance is the high-quality abrasive grain composition, bonded in a vitrified matrix that resists loading while maintaining a sharp cutting action. This specific formulation is optimized for ferrous metals, allowing operators to remove material efficiently without generating excessive heat that could compromise the temper of the workpiece. The W-225 shape is particularly effective for internal grinding operations, such as enlarging bore holes, smoothing out casting flash in recessed areas, or blending contours in mold making. The rigidity of the bond ensures that the point retains its geometry longer, reducing the frequency of dressing required during extended use.

Vibration control is a critical factor in precision grinding, and the Walter 12D821 excels in this regard. Each point is manufactured to strict concentricity tolerances, ensuring that the tool spins true at high RPMs. This "vibration-free" operation is not merely a comfort feature; it is a quality assurance necessity. Vibration causes chatter marks on the workpiece, leading to rework or scrapped parts. Furthermore, excessive runout damages the spindle bearings of pneumatic and electric die grinders. By choosing Walter's balanced mounted points, facilities protect their expensive power tools while achieving superior surface finishes on cast iron and steel components.

Technical Application Profile

This mounted point is engineered for specific metallurgical applications where standard aluminum oxide points might fail or wear prematurely. It is particularly suited for:

• Fitting and Assembly: Precise removal of material to ensure tight tolerances between mating parts.
• Cavity Finishing: Reaching into molds and dies to smooth surfaces after rough machining.
• Deburring: Removing sharp edges from drilled holes or machined slots in hard alloys.