Grier Abrasives A25-N4-17834 Mounted Point Ball Coarse

Product Description

The GRIER ABRASIVES A25-N4-17834 is a ball-shaped mounted point abrasive designed for precision grinding, deburring, and surface finishing on metal and hard materials. Built with aluminum oxide grain and a unitized bond, this mounted point delivers consistent stock removal in a coarse grade suited for aggressive material work. The green-colored wheel body is 1 inch thick with a 1/4-inch shank diameter and runs at a rated maximum of 35,620 RPM. It is installed and operated by machinists, toolroom technicians, and metalworking professionals using die grinders and rotary tools.

This mounted point is well suited for internal grinding, contour work, and hard-to-reach areas where a standard bench wheel cannot reach. The ball shape (A25 designation) makes it effective for working inside bores, cavities, and curved profiles. It is used in both production and maintenance environments where a coarse cut is needed to remove material quickly before finishing passes. The 1-1/2-inch shank length provides adequate reach for most standard die grinder collets.

Key Features

• Ball-shaped A25 point for internal and contour grinding
• Coarse grade aluminum oxide abrasive for aggressive stock removal
• Unitized bond construction rated for very hard density applications
• Maximum operating speed of 35,620 RPM
• 1/4-inch shank diameter fits standard die grinder collets
• Green color coding for quick grade and material identification

Compatibility

Designed for use with die grinders and rotary tools accepting a 1/4-inch shank collet. Suitable for grinding and deburring ferrous metals, hardened steel, and similar hard materials where aluminum oxide abrasive is appropriate.

Installation Notes

Mounting and operation should be performed by qualified machinists or metalworking technicians familiar with abrasive tooling safety. Before mounting, verify that the tool spindle speed does not exceed the 35,620 RPM maximum rated speed of the mounted point. Inspect the abrasive for chips or cracks before each use and discard any damaged piece. Always use appropriate eye protection and guarding when operating rotary abrasive tools.