Diamond BB Facing Tool

Perfect alignment starts at the bottom bracket. Designed for use on carbon and aluminum/carbon hybrid bottom bracket shells. 

The Rotation Engineering Diamond BB Facing Tool brings a new level of precision and control to bottom bracket preparation. Instead of aggressive cutting teeth that remove material quickly and unpredictably, this tool utilizes a diamond-coated super abrasive surface to gradually and precisely face the bottom bracket shell.

The result is a smooth, perfectly square interface that ensures optimal bearing alignment and long-term drivetrain performance.

Traditional facing tools require frequent sharpening as their cutting edges dull. The diamond abrasive eliminates that maintenance entirely—no sharpening, no downtime, just consistent performance.

For professional mechanics and meticulous home builders, this tool offers the control needed to prepare frames properly without the risk of over-cutting.

Built for the modern workshop, the Rotation Engineering BB Facing Tool delivers precision, longevity, and confidence in every cut.

• Superior control compared to large cutting teeth
• Gradual material removal prevents aggressive over-cutting
• Extremely durable diamond abrasive surface
• No sharpening required — ever
• Consistent results