Pferd 21823201 Carbide Bur Ball Nose Cylinder 1/4 in SC-51

Product Description

The PFERD 21823201 is a single-cut carbide rotary bur with a ball nose cylinder head profile, designed for material removal, deburring, and shaping operations on metal and other hard materials. The cutting head measures 0.25 inches in diameter with a 0.5-inch length of cut, and the tool runs on a 0.125-inch shank at speeds up to 48,000 RPM. Single-cut tooth geometry produces a smoother finish than double-cut and is well suited for work on ferrous metals and harder alloys. Machinists, tool-and-die technicians, and maintenance professionals install this bur into die grinders and rotary tools for precision material work.

This bur is used in applications requiring controlled stock removal on internal contours, cavities, and radii where the ball nose cylinder profile can follow curved surfaces. Typical install scenarios include weld prep, port work, mold finishing, and deburring of drilled or cast features. The SC-51 industry specification identifies the head shape and size class within the standardized bur series.

Key Features

• Ball nose cylinder head profile conforms to curved internal surfaces and contours
• Single-cut tooth style for smoother surface finish on ferrous metals
• 0.25-inch cutting diameter and 0.5-inch length of cut for precise reach into small features
• Carbide head material provides hardness and wear resistance for extended service life
• Rated to 48,000 RPM for use with high-speed die grinders and rotary tools
• 0.125-inch shank fits standard collets on most die grinders

Compatibility

Designed to fit die grinders and rotary tools accepting a 0.125-inch shank collet, conforming to the SC-51 industry bur specification.

Installation Notes

Installation is performed by machinists, maintenance technicians, or skilled tradespeople using a compatible die grinder or rotary tool with a 0.125-inch collet. Always ensure the tool is powered off and disconnected from the air supply or electrical source before changing burs. Inspect the collet and shank for wear or damage before seating the bur, and do not exceed the rated maximum RPM of 48,000. Eye protection and appropriate personal protective equipment must be worn during operation.