Tru-maxx 66253255684 Surface Grinding Wheel 7in 100 Grit

Product Description

The TRU-MAXX 66253255684 is a Type 1 surface grinding wheel designed for precision stock removal and surface finishing on ferrous metals and tool steels. Built from aluminum oxide abrasive with a vitrified bond, this wheel delivers consistent cut rate and dressing response across a broad range of surface grinding applications. At 100 grit with a K hardness (medium), it falls in the fine-grade range, making it well suited for finish passes where surface quality matters alongside material removal. The grain structure rating of 6 and semi-friable abrasive promote self-sharpening action during use. Rated to 3600 RPM, it is sized at 7 inches in diameter and 1/2 inch thick with a 1-1/4 inch arbor hole. The wheel weighs 2 pounds.

This wheel is intended for use on horizontal-spindle reciprocating-table surface grinders in job shop, maintenance, and toolroom environments. The 7-inch diameter and 1-1/4 inch arbor bore fit a common class of benchtop and mid-size surface grinders. The fine 100-grit cut and medium K hardness make this wheel a practical choice for finishing flat surfaces, sharpening tooling, and light material removal on hardened steel and similar workpieces. It is a non-porous, no-recess wheel with a pink aluminum oxide composition.

Key Features

• Type 1 straight wheel profile with no recess — mounts directly to standard surface grinder spindles
• Aluminum oxide abrasive, pink — semi-friable grain promotes self-sharpening for consistent cut
• Vitrified bond for rigid wheel structure, precise form holding, and easy dressing
• 100 grit, fine grade — suited for finish grinding and light stock removal
• K hardness (medium) with grain structure 6 — balanced wheel life and cut aggressiveness
• 3600 RPM maximum operating speed

Compatibility

Designed as an OEM-style replacement or standard consumable for surface grinders accepting a 7-inch diameter, 1-1/4 inch arbor hole, Type 1 straight grinding wheel.

Installation Notes

Surface grinding wheels must be installed by qualified personnel familiar with ANSI B7.1 safety requirements for abrasive wheel mounting. Before mounting, power down and lock out the grinder per OSHA lockout/tagout procedures. Perform a ring test on the wheel prior to installation and inspect for cracks or chips. Never exceed the 3600 RPM maximum speed rating marked on the wheel.