Grier Abrasives B121-N3-17234 Mounted Point Ball Medium

Product Description

The GRIER ABRASIVES B121-N3-17234 is an aluminum oxide mounted point with a B121 ball shape profile, designed for precision grinding, deburring, and surface finishing on metal and other hard materials. The abrasive head measures 1/2 inch in thickness and mounts on a 1/8-inch diameter shank with a 1.5-inch shank length, making it compatible with standard die grinders and rotary tools. With a medium grade and medium density unitized bond construction, this mounted point delivers consistent stock removal with controlled surface finish. It is rated to a maximum of 45,370 RPM. At 0.006 pounds, it is a lightweight precision consumable suited for close-tolerance work.

This mounted point is used in metalworking, fabrication, and maintenance applications where internal grinding, port work, weld blending, or deburring in confined areas is required. The ball shape profile is well suited for curved surfaces, concave contours, and cavity work. It is commonly used by machinists, tool and die professionals, and maintenance technicians in production and repair environments. The 1/8-inch shank fits most standard collet sizes found on pneumatic and electric die grinders.

Key Features

• B121 ball shape profile for grinding curved surfaces and confined contours
• Aluminum oxide abrasive material provides durable, consistent cutting action on ferrous metals
• Medium grade and medium density for balanced stock removal and surface finish
• Unitized bond construction maintains shape integrity through the life of the point
• Rated to 45,370 RPM for use with standard die grinders
• 1/8-inch shank diameter fits most standard collet sizes

Compatibility

Designed for use with die grinders and rotary tools accepting a 1/8-inch shank collet. Suitable for grinding, deburring, and finishing operations on ferrous metals and other hard materials in fabrication and maintenance applications.

Installation Notes

Mounted points are installed by a machinist or technician into the collet of a die grinder or rotary tool. Ensure the tool is powered off and disconnected from its air or electrical source before changing accessories. Verify the tool spindle speed does not exceed the 45,370 RPM maximum rating of this point. Inspect the mounted point for cracks or damage before each use and do not use damaged abrasives.