Norton 66260273588 Diamond Grinding Wheel 120 Grit 4in

Product Description

The NORTON 66260273588 is a Type 1A1 diamond surface grinding wheel designed for precision material removal in wet grinding applications. Built with a synthetic diamond (SD) abrasive and a resinoid bond, this wheel delivers consistent, fine-grade cutting performance on hard and brittle materials. It measures 4 inches in diameter, 1/4 inch thick, with a 1-1/4 inch arbor hole. The 120-grit, fine-grade specification suits roughing and cut-off operations where controlled stock removal and surface finish are both priorities. The R hardness code indicates a soft wheel rating, which helps the abrasive shed and expose fresh diamond particles during use.

This wheel is suited for bench grinders and surface grinding machines used in machine shops, tool rooms, and maintenance facilities. The wet operation design means it requires coolant flow during use to manage heat, extend wheel life, and protect the workpiece surface. With a superabrasive concentration of 100 and a 1/4-inch superabrasive depth, this wheel carries full abrasive throughout its usable grinding face. It is a practical choice for tradespeople and machinists working with carbide tooling, ceramics, glass, or other hard materials that require diamond abrasives.

Key Features

• Synthetic diamond (SD) abrasive for cutting hard and brittle materials
• Resinoid bond construction provides controlled abrasive release during wet grinding
• 120-grit fine grade for finish-oriented roughing and cut-off work
• Type 1A1 straight wheel profile with no recess and no taper
• Superabrasive concentration of 100 across a 1/4-inch abrasive depth
• Soft hardness rating (R) promotes consistent self-dressing action

Compatibility

Designed for surface grinding machines and bench grinders accepting a 4-inch diameter, Type 1A1 straight wheel with a 1-1/4 inch arbor hole. Intended for wet operation only. Specification designation SD120-R100B99-1/4 confirms abrasive type, grit, hardness, bond, concentration, and depth.

Installation Notes

Grinding wheel installation and dressing should be performed by a qualified machinist or toolroom technician familiar with abrasive wheel safety. Always power down and lock out the machine before mounting or removing the wheel. Inspect the wheel for cracks or chips before installation and never exceed the maximum RPM rated for the wheel and machine. This wheel requires continuous coolant flow during operation — do not run dry.