Norton 69936662923 Surface Grinding Wheel 46 Grit 8 in

Product Description

The NORTON 69936662923 is a Type 1 surface grinding wheel engineered for precision stock removal on soft carbon steels, tool steels, and super alloys. Built around an aluminum oxide abrasive in a vitrified bond matrix, this coarse-grade wheel runs at a maximum rated speed of 3,105 RPM and carries an H hardness code, indicating a relatively soft wheel that releases grain efficiently to prevent loading. At 8 inches in diameter, 1/2 inch thick, and bored to a 1-1/4 inch hole, it is a standard production geometry sized for horizontal spindle surface grinders. The Series 25A specification designation (25A46-HVBE) identifies the exact abrasive blend, grade, and structure for traceability to NORTON grinding system specifications. Licensed HVAC, machining, and toolroom professionals rely on this wheel for flat and angular surface work.

This grinding wheel is suited for wet or dry operation and targets applications involving soft carbon steels, tool steels, and super alloys. It mounts on CNC cutting tool machines, cylindrical grinders, and surface grinders. The pink aluminum oxide grain is semi-friable, meaning it fractures under load to expose fresh cutting edges while maintaining reasonable wheel life. The porous, open structure aids coolant flow during wet grinding, reducing heat buildup at the workpiece surface. It is a common choice in toolroom and production grinding environments where consistent surface finish and dimensional accuracy are required.

Key Features

• Type 1 flat wheel profile — no recess, no taper — standard for surface and cylindrical grinding spindles
• 46 grit coarse grade aluminum oxide abrasive for aggressive material removal
• Vitrified bond provides rigidity and porosity for both wet and dry operation
• H hardness (soft) grade releases worn grain readily, reducing glazing on softer workpiece materials
• Semi-friable grain structure self-sharpens under grinding pressure to extend usable wheel life
• Series 25A specification (25A46-HVBE) for exact abrasive system traceability

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 in wet or dry operation.

Installation Notes

Grinding wheel mounting must be performed by a qualified operator following ANSI B11.9 and OSHA 29 CFR 1910.215 guarding requirements. Always ring-test the wheel before mounting and confirm the machine spindle speed does not exceed the 3,105 RPM maximum marked on the wheel. Use proper flanges and blotters; never exceed the rated flange diameter or over-torque the spindle nut. Dress the wheel face before first use to true the running surface and expose fresh abrasive grain.