Norton 66260273605 Cbn Surface Grinding Wheel 120 Grit

Product Description

The NORTON 66260273605 is a Type 1A1 cubic boron nitride (CBN) surface grinding wheel designed for demanding material removal applications. Built with a resinoid bond and a fine, 120-grit CBN abrasive, it delivers consistent stock removal on hard ferrous materials and hardened steels where conventional abrasives wear prematurely. The wheel measures 6 inches in diameter, 1/4 inch thick, with a 1-1/4 inch arbor hole. Hardness is rated Medium (code T), and the CBN superabrasive depth runs 1/4 inch. It carries a 75 concentration rating, which balances wheel life with cut rate. Grinding technicians and tool-and-die professionals are the primary installers and users of this wheel.

This wheel is suited for roughing and cut-off operations on surface grinders in both shop and production environments. The Type 1A1 straight-wheel profile fits standard horizontal-spindle surface grinders. The resinoid bond performs well across a range of material hardness levels, and the CBN abrasive makes this wheel a practical choice for hardened tool steels, high-speed steels, and similar ferrous alloys that wear down aluminum oxide wheels rapidly. The 6-inch diameter and 1-1/4 inch bore are common dimensions for bench and surface grinding machines found in machine shops and maintenance facilities.

Key Features

• CBN (cubic boron nitride) abrasive for extended life on hardened ferrous materials
• Type 1A1 straight-wheel profile fits horizontal-spindle surface grinders
• Resinoid bond provides good shock resistance and consistent performance
• 120 grit, fine grade for controlled stock removal and improved surface finish
• Medium hardness (T) with 75 superabrasive concentration balances wheel life and cut rate
• No recess, no taper — straightforward mounting on standard arbors

Compatibility

Designed as a Type 1A1 straight CBN grinding wheel for use on horizontal-spindle surface grinders accepting a 6-inch diameter wheel with a 1-1/4 inch arbor hole. Specification code CB120-TB99-1/4 identifies bond and abrasive configuration for cross-reference.

Installation Notes

This wheel should be mounted and dressed by a qualified machinist or grinding technician following ANSI B7.1 safe-use guidelines for abrasive wheels. Power down and lock out the grinder before mounting or removing the wheel. Inspect the wheel for cracks or chips before each use and never exceed the rated maximum operating speed marked on the wheel. Flanges and blotters must be clean, flat, and correctly sized before tightening the arbor nut.