Norton 66260273567 Cbn Grinding Wheel 120 Grit 7in

Product Description

The NORTON 66260273567 is a Type 1A1 cubic boron nitride (CBN) surface grinding wheel built for demanding material removal on hard ferrous workpieces. It measures 7 inches in diameter, 0.5 inches thick, with a 1.25-inch arbor hole and a 0.25-inch superabrasive depth. The resinoid bond matrix holds 120-grit CBN abrasive at a medium hardness rating (Grade T) and 75 concentration, delivering consistent stock removal during roughing and cut-off operations. This wheel is sized and specified for use on surface grinders in production, job shop, and tool room environments. Qualified grinding machine operators and toolroom machinists install and dress this wheel.

This wheel is suited to surface grinding applications involving hard and heat-sensitive materials where CBN outperforms conventional aluminum oxide abrasives. The Type 1A1 straight-wheel form fits standard surface grinder spindles. It is part of the Norton CBN series and carries the specification code CB120-TB99-1/4, which encodes the abrasive type, grit, bond, concentration, and superabrasive depth for precise wheel selection. The fine, 120-grit rating makes it appropriate for roughing passes and cut-off operations where consistent wheel life and thermal stability are priorities.

Key Features

• Cubic boron nitride (CBN) abrasive for superior hardness and heat resistance on ferrous materials
• Resinoid bond provides controlled abrasive release and smooth cutting action
• 120 grit, fine grade for consistent material removal in roughing and cut-off applications
• Medium hardness (Grade T) with 75 superabrasive concentration for balanced wheel life
• Type 1A1 straight-wheel form with no recess and no taper for direct spindle mounting
• 0.25-inch superabrasive depth extends usable wheel life between dressings

Compatibility

Designed as an OEM-style replacement or direct-specification surface grinding wheel for standard surface grinders accepting a 7-inch diameter, 0.5-inch wide, Type 1A1 straight wheel with a 1.25-inch arbor hole.

Installation Notes

Installation should be performed by a qualified grinding machine operator or toolroom machinist. Power down and lock out the grinder before mounting or removing any wheel. Inspect the wheel for cracks or chips before mounting and perform a ring test per ANSI B11.9 guidelines. Never exceed the maximum operating speed marked on the wheel, and always run the wheel through a guard-protected break-in period before presenting it to the workpiece.