Norton 66253246850 Surface Grinding Wheel 8in 46 Grit

Product Description

The NORTON 66253246850 is a Type 5 vitrified aluminum oxide surface grinding wheel from the Gemini Precision Vitrified Grinding Wheels series. It measures 8 inches in diameter and 1 inch thick with a 1-1/4-inch arbor hole, making it compatible with standard surface grinder spindles. The wheel carries a 46 grit, coarse-grade abrasive specification and a J hardness code, placing it in the medium hardness range. A vitrified bond and semi-friable aluminum oxide grain deliver consistent stock removal on soft carbon steels and tool steels. Maximum rated speed is 3,600 RPM. The wheel features a single-side recess measuring 3 inches in diameter and 1/2 inch deep, which is the defining geometry of the Type 5 form factor.

This wheel is intended for use on cylindrical grinders and surface grinders in industrial and toolroom environments. It is well suited for grinding soft carbon steels and tool steels where a coarse, open cut is required. The Gemini GEMINI 46-J specification indicates consistent grain friability and bond strength, supporting stable performance across typical wet or dry surface grinding operations. The blue and gray wheel color is characteristic of Norton Gemini vitrified product lines. Both MOQ and package quantity are 1.

Key Features

• Type 5 single-side recessed form: 3-inch recess diameter, 1/2-inch recess depth
• 46 grit coarse-grade aluminum oxide abrasive for aggressive stock removal
• J hardness code, medium hardness rating, vitrified bond
• Semi-friable grain structure supports consistent cutting action on steels
• Rated to 3,600 RPM maximum operating speed
• Gemini Precision Vitrified series with GEMINI 46-J specification

Compatibility

Designed for use with cylindrical grinders and surface grinders. Suitable for grinding soft carbon steels and tool steels. The 8-inch diameter and 1-1/4-inch arbor hole fit standard spindle configurations on machines accepting Type 5 wheels in this size range.

Installation Notes

Installation should be performed by a qualified machine operator or grinding specialist following the machine manufacturer's mounting instructions and applicable ANSI B11.9 grinding machine safety standards. Always perform a ring test before mounting and confirm the spindle speed does not exceed the 3,600 RPM wheel rating. Power down and lock out the grinder before changing wheels. Never exceed the rated maximum RPM marked on the wheel.