Norton 66260273557 Surface Grinding Wheel 120 Grit 6in

Product Description

The NORTON 66260273557 is a Type 1A1 diamond surface grinding wheel designed for precision surface grinding and roughing or cut-off operations on hard, abrasion-resistant materials. The wheel uses a synthetic diamond (SD) abrasive bonded with a resinoid bond at 100 concentration, delivering consistent stock removal and fine surface finishes. At 120 grit with a Fine grade and Soft hardness rating (R), it is suited for wet operation to manage heat and extend wheel life. Licensed grinding machine operators and tool room machinists are the primary users of this wheel.

This wheel fits surface grinding applications in tool rooms, industrial maintenance shops, and production grinding environments. It is intended for wet surface grinding of hard materials such as carbide, ceramics, and hardened steel where precise stock removal is required. The 1/4 inch superabrasive depth provides a serviceable working layer for extended use. The Type 1A1 straight wheel profile is the standard configuration for surface and cylindrical grinding operations.

Key Features

• Synthetic diamond (SD) abrasive at 100 concentration for consistent, aggressive cutting action
• Resinoid bond provides controlled cut rate and good surface finish on hard materials
• 120 grit Fine grade delivers smooth finish on carbide, ceramics, and hardened materials
• Soft hardness rating (R) reduces glazing and promotes free cutting during wet operation
• 1/4 inch superabrasive depth extends service life between dressing cycles
• No recess, no taper — straight Type 1A1 profile for direct mounting on surface grinder arbors

Compatibility

Designed as an OEM-style replacement or direct-fit grinding wheel for surface grinders accepting a 1-1/4 inch arbor hole and a 6 inch diameter Type 1A1 straight wheel. Specification code SD120-R100B99-1/4 identifies this wheel within the Norton Diamond series.

Installation Notes

Installation should be performed by a qualified grinding machine operator following ANSI B7.1 safe mounting practices for bonded abrasive wheels. Power down and lock out the grinding machine before mounting or removing the wheel. Inspect the wheel for cracks or chips using the ring test before mounting, and never exceed the rated operating speed marked on the wheel. Wet operation requires adequate coolant flow to be established before the wheel contacts the workpiece.