Tru-maxx 66253255503 Surface Grinding Wheel 60 Grit 7 in

Product Description

The TRU-MAXX 66253255503 is a Type 1 straight surface grinding wheel designed for bench and surface grinder applications requiring consistent stock removal and a controlled finish. Built from white aluminum oxide abrasive with a vitrified bond, this wheel carries a J hardness rating and a medium grade designation, making it well-suited for ferrous metals and tool steels where the abrasive needs to break down at a controlled rate. The wheel measures 7 inches in diameter, 0.5 inches thick, and accepts a 1.25-inch arbor hole. Maximum operating speed is 3600 RPM. Grain structure is rated 6, and the specification code is 28A60J6V31.

This grinding wheel is used in surface grinding operations on bench grinders and pedestal grinders in machine shops, maintenance facilities, and toolroom environments. The 60 grit size targets medium-stock-removal passes on hardened tool steel, high-speed steel, and similar ferrous workpieces. The semi-friable aluminum oxide grain self-sharpens during use, reducing glazing between dresses. The non-porous, vitrified bond structure provides rigidity and form-holding during precision flat grinding. Licensed machinists, toolroom technicians, and maintenance mechanics are the typical installers and operators.

Key Features

• Type 1 straight wheel profile with no recess for standard surface and bench grinder spindles
• White aluminum oxide abrasive — semi-friable grain that self-sharpens during cutting
• Vitrified bond delivers rigid, form-holding performance for flat surface work
• J hardness code with medium grade rating balances wheel life against cut rate on ferrous metals
• 60 grit size suited for medium stock removal and intermediate surface finish
• Rated to 3600 RPM maximum operating speed

Compatibility

Designed as an OEM-style replacement or standard supply wheel for bench grinders and surface grinders accepting a 7-inch diameter, 0.5-inch wide Type 1 wheel with a 1.25-inch arbor hole.

Installation Notes

Mounting and operation of grinding wheels must comply with ANSI B11.9 and OSHA 1910.215 standards — always perform a ring test before mounting and never exceed the rated maximum RPM of 3600. Power down and lock out the grinder before changing wheels. Use proper flanges and blotters sized for the wheel bore, and inspect the wheel for cracks or chips before every use. Wheel dressing should be performed by qualified personnel using an appropriate diamond or star dresser to true the face and restore cutting action.