Tru-maxx 66253269539 Surface Grinding Wheel 46 Grit

Product Description

The TRU-MAXX 66253269539 is a Type 5 surface grinding wheel designed for precision stock removal on surface grinders in metalworking and toolroom applications. It measures 12 inches in diameter, 1.5 inches thick, with a 5-inch arbor hole and a 7.5-inch one-side recess. The wheel is made from aluminum oxide abrasive bonded with a vitrified bond, rated at 46 grit coarse grade with a J hardness code, placing it in the medium hardness range. Maximum operating speed is 2705 RPM. Semi-friable grain construction allows the wheel to fracture slightly during use, continually exposing fresh cutting edges for consistent material removal on ferrous metals and tool steels.

This wheel is suited for flat and surface grinding operations on horizontal and vertical spindle surface grinders in production machine shops, tool and die operations, and maintenance grinding environments. The Type 5 recessed profile reduces weight and improves clearance on the wheel sides during face grinding. The coarse 46 grit makes it well-suited for aggressive stock removal rather than fine finishing passes. Pink aluminum oxide composition is commonly selected for grinding high-speed steels, alloy steels, and hardened tool steels where heat control and grain friability matter.

Key Features

• Type 5 recessed wheel with 7.5-inch one-side recess for improved side clearance
• 46 grit coarse aluminum oxide abrasive for aggressive material removal
• J hardness (medium) vitrified bond for controlled wheel breakdown and consistent cutting action
• Semi-friable grain structure continuously exposes fresh abrasive during grinding
• Non-porous construction for use on standard surface grinder spindles
• Rated to 2705 RPM maximum operating speed

Compatibility

Designed as an OEM-style replacement or standard consumable for horizontal and vertical spindle surface grinders accepting a 5-inch arbor hole and a 12-inch diameter Type 5 wheel. Verify spindle RPM rating does not exceed 2705 RPM before mounting.

Installation Notes

Installation should be performed by a qualified machine operator or toolroom technician familiar with abrasive wheel safety per ANSI B7.1 standards. Always ring-test the wheel before mounting and inspect for cracks or damage. Power down and lock out the grinder before changing wheels. Never exceed the maximum rated speed of 2705 RPM, and always use proper flanges and blotters as required by the machine manufacturer.