Norton 66252939707 Surface Grinding Wheel 80 Grit 7 in

Product Description

The NORTON 66252939707 is a Type 1 surface grinding wheel engineered for precision stock removal on ferrous and specialty metals. Built on an aluminum oxide abrasive with a vitrified bond, this wheel carries an H hardness code and a medium grade rating, making it well suited for controlled material removal without excessive wheel wear. The 38A series designation indicates a semi-friable abrasive structure that self-sharpens during aggressive cuts. At 7 inches in diameter and 1/4 inch thick with a 1-1/4 inch arbor hole, it fits a wide range of production and toolroom surface grinders. Maximum operating speed is rated at 3600 RPM.

This wheel is used in surface grinding operations on soft carbon steels, tool steels, and super alloys. It is rated for use on surface grinders, cylindrical grinders, and CNC cutting tool machines in both production and toolroom environments. The non-porous, non-tapered, no-recess Type 1 flat wheel profile is the standard configuration for horizontal-spindle reciprocating surface grinders. Machinists and toolroom technicians typically select the 38A80-HVBE specification when working with materials that require a balance of cut rate and surface finish quality.

Key Features

• Aluminum oxide abrasive with semi-friable structure for consistent self-sharpening action
• Vitrified bond provides rigidity and open structure for efficient chip clearance
• H hardness code and medium grade suit moderate material removal on ferrous and alloy workpieces
• Type 1 flat wheel geometry with no recess and no taper fits standard surface grinder arbors
• 3600 RPM maximum operating speed rating
• White wheel color aids visual inspection of wheel condition during service

Compatibility

Rated for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Suitable for grinding soft carbon steels, tool steels, and super alloys per the 38A Type 1 series specification.

Installation Notes

Surface grinding wheels must be installed by a qualified machinist or grinding equipment operator following ANSI B11.22 and OSHA 1910.215 guarding requirements. Before mounting, perform a ring test to check for cracks and verify the wheel speed rating meets or exceeds the grinder spindle speed. Power down and lock out the machine before changing wheels. Never exceed the 3600 RPM maximum rated speed marked on the wheel.