Norton 66260273589 Surface Grinding Wheel 150 Grit

Product Description

The NORTON 66260273589 is a Type 1A1 diamond surface grinding wheel designed for precision grinding of hard and superhard materials. It measures 4 inches in diameter, 1/4 inch thick, and features a 1-1/4 inch center hole. The abrasive matrix uses synthetic diamond (SD) held in a resinoid bond at 100 concentration, delivering consistent material removal across both roughing and finishing passes. Rated at 150 grit in the Very Fine grade range with a Soft hardness code (R), this wheel is engineered for wet operation and suits applications where tight surface finish tolerances are required.

This wheel is used in surface grinding operations on hard substrates including carbide, ceramics, and hardened tool steels. The Type 1A1 straight wheel profile fits standard surface grinder spindles and is well suited for flat-face grinding in tool rooms, carbide shops, and precision manufacturing environments. Its 1/4 inch superabrasive depth provides extended service life under normal wet-grinding conditions. Installation is performed by qualified machinists or tool-and-die personnel.

Key Features

• Type 1A1 straight wheel profile for flat surface grinding
• Synthetic diamond abrasive at 100 concentration for consistent stock removal
• Resinoid bond provides good friability and surface finish control
• 150 grit Very Fine grade for roughing and finishing in a single wheel
• Soft hardness rating (R) reduces heat buildup on sensitive workpieces
• Wet operation design for use with grinding coolant or cutting fluid

Compatibility

Designed as an OEM-style replacement or direct-fit grinding wheel for surface grinders accepting a Type 1A1 wheel with a 4 inch diameter and 1-1/4 inch arbor hole.

Installation Notes

Surface grinding wheels must be installed by a qualified machinist following ANSI B7.1 safe-use requirements. Inspect the wheel for cracks or chips before mounting and perform a ring test per standard procedure. Ensure the grinder spindle is fully de-energized and locked out before wheel changes. Always use the correct blotters and flanges, and run the wheel at reduced speed for at least one minute before applying workpiece contact.