Merit Abrasives 69078645338 Mounted Point B121 80 Grit

Product Description

The MERIT ABRASIVES 69078645338 is a ball-shaped mounted point designed for precision grinding, deburring, and surface blending in tight or contoured areas. It features an aluminum oxide abrasive bonded with a resinoid bond at 80 grit coarse grade, making it well-suited for aggressive stock removal on ferrous metals and hard alloys. The point measures 0.5 inches thick with an overall length of 2 inches, including a 1.5-inch shank. With a rated maximum speed of 45,370 RPM, it is built for use on die grinders and rotary tools operated by machinists, tool-and-die workers, and maintenance technicians.

This mounted point is used in industrial maintenance, fabrication, and toolroom applications where a standard flat wheel cannot reach. The B121 ball shape is appropriate for grinding internal radii, weld blending inside bores, and smoothing cast or machined surfaces. It fits standard 0.25-inch collet die grinders and pneumatic or electric rotary tools. It is packaged individually with a minimum order quantity of 5 units, making it suitable for shop stock replenishment.

Key Features

• B121 ball point shape for grinding internal curves, bores, and contoured surfaces
• 80 grit coarse aluminum oxide abrasive for fast, aggressive stock removal
• Resinoid bond with medium density for consistent cut rate and wheel integrity
• Rated to 45,370 RPM for compatibility with standard die grinder operating speeds
• 0.25-inch shank diameter fits common collet sizes on die grinders and rotary tools
• Pink aluminum oxide formulation suited for ferrous metals and hardened steels

Compatibility

Designed for use with die grinders and rotary tools accepting a 0.25-inch shank collet. Suitable for general-purpose grinding, deburring, and blending on metal workpieces in industrial and toolroom settings.

Installation Notes

Mounted points must be installed in a collet that matches the shank diameter exactly — in this case 0.25 inches. Before mounting, verify the tool spindle speed does not exceed the rated maximum of 45,370 RPM. Always power down and disconnect the tool before changing mounted points. Wear appropriate eye protection and follow ANSI B7.1 safety standards for abrasive wheel use.