Norton 66253262563 Surface Grinding Wheel 12in 46 Grit

Product Description

The NORTON 66253262563 is a Type 1 surface grinding wheel built for heavy-stock removal on ferrous and non-ferrous metals. The wheel measures 12 inches in diameter, 1 inch thick, with a 5-inch arbor hole. It is constructed with aluminum oxide abrasive bonded in a vitrified matrix, resulting in a rigid, porous structure that holds form well under continuous surface grinding. Rated at a maximum of 2,070 RPM, this wheel carries a coarse 46 grit rating and an H hardness code, classifying it as a soft-grade wheel suited to harder workpiece materials. The series specification is 32A46-HVBE. Machinists and tool room operators use this wheel on surface grinders and CNC cutting tool machines.

This wheel is intended for surface grinding applications in production and maintenance machining environments. It performs on a broad range of materials including 400 series stainless steel, hard and soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron. Compatible equipment includes surface grinders, cylindrical grinders, and CNC cutting tool machines. The soft H-grade hardness allows the wheel to release dull abrasive grains readily when grinding hard alloys, maintaining a free-cutting action and reducing heat buildup at the workpiece surface.

Key Features

• Type 1 flat wheel profile with no recess and no taper — straightforward mounting on standard surface grinder spindles
• Aluminum oxide abrasive in a vitrified bond for rigid, consistent cutting action
• Porous structure improves coolant retention and chip clearance during wet or dry grinding
• 46 grit coarse grade for aggressive stock removal applications
• H hardness (soft grade) promotes self-dressing on hard metals, reducing glazing
• Rated for 32A46-HVBE specification — a standard Norton series designation for ferrous surface grinding

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Suitable for grinding 400 series stainless steel, hard carbon steels, soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron.

Installation Notes

Grinding wheel installation and dressing must be performed by a qualified machinist or toolroom technician following ANSI B11.9 and OSHA 29 CFR 1910.215 safety standards. Always ring-test the wheel for cracks before mounting and confirm the machine spindle speed does not exceed the wheel's 2,070 RPM maximum rating. Power down and lock out the grinder before mounting or removing the wheel. Use proper flanges and blotters as specified by the grinder manufacturer — never over-tighten the spindle nut.