Norton 66253019354 Surface Grinding Wheel 8in 46 Grit

Product Description

The NORTON 66253019354 is a Type 1 surface grinding wheel engineered for precision stock removal on soft carbon steels, tool steels, and super alloys. It measures 8 inches in diameter and 1/2 inch thick with a 1-1/4 inch arbor hole. The abrasive is aluminum oxide, bonded in a vitrified matrix rated to 3,600 RPM. Hardness code H places this wheel in the soft range of the hardness scale, which promotes consistent, free-cutting action on harder workpiece materials. The 46 grit size delivers coarse, aggressive material removal suited to roughing passes and surface grinding operations where stock reduction is the priority.

This wheel is designed for wet grinding operations on CNC cutting tool machines, cylindrical grinders, and surface grinders. The 25A series aluminum oxide formulation is a semi-friable abrasive that self-sharpens under load, maintaining cut rate on demanding materials including tool steels and super alloys. The vitrified bond provides rigidity and coolant permeability, making it well suited to wet-coolant surface grinding setups in production and tool-room environments.

Key Features

• Type 1 straight wheel profile — no recess, compatible with standard surface and cylindrical grinder arbors
• 46 grit coarse aluminum oxide abrasive for high stock-removal roughing passes
• Vitrified bond with porous structure supports coolant flow and chip clearance in wet grinding
• Semi-friable abrasive continuously self-sharpens, reducing glazing on tool steels and super alloys
• Hardness code H (soft grade) sustains free-cutting action on harder workpiece materials
• Maximum operating speed 3,600 RPM — verify spindle speed before mounting

Compatibility

Rated for use with CNC cutting tool machines, cylindrical grinders, and surface grinders. Suitable for grinding soft carbon steels, tool steels, and super alloys. Specification code 25A46-HVP2 identifies the full wheel bond and grade designation for direct cross-reference.

Installation Notes

This wheel must be installed by a qualified grinding machine operator or toolroom technician following ANSI B7.1 safe mounting procedures. Always perform a ring test before mounting and ensure the machine spindle speed does not exceed the 3,600 RPM rating marked on the wheel. Flanges, blotters, and arbor hardware must be clean, flat, and correctly sized for the 1-1/4 inch hole before tightening. Never exceed rated speed, and dress the wheel with an appropriate dressing tool before the first grinding pass.