3mm Ball-Nose Rotary Burr, 38mm Length, Cross-Cut Flute Pattern

Overview

This compact rotary burr delivers precision finishing for internal corners, radii, and complex contours—a workhorse for tool production shops and precision machining operations. The cross-cut flute pattern removes material efficiently while leaving a smooth, finished surface. The tapered shank with machined flat faces ensures secure collet grip without slippage, making it reliable for detailed work where accuracy matters.

For shops requiring a full range of burr sizes, consider pairing this with larger 4mm and 6mm ball-nose options to handle varied finishing tasks across your product line.

Key Features

• Ball-Nose Head Design: Ideal for radiused internal corners and curved surfaces; eliminates sharp edges
• Cross-Cut Flute Pattern: Multiple intersecting flutes for smooth material removal and superior surface finish
• Tapered Shank with Flat Faces: Prevents rotation and slippage in collet chucks; ensures repeatable positioning
• Compact Size: 3mm head diameter suits precision work and intricate details
• Single-Piece Construction: Monolithic carbide or hardened steel design for durability and concentricity

Business Advantages for Resellers

• High Demand in Tool Production: Burrs are consumables in any precision shop; regular reorder potential
• Margin-Friendly: Low material cost relative to selling price; suitable for bulk inventory
• Complements Larger Burrs: Stock this alongside medium and large-format burrs to offer complete finishing solutions
• Long Shelf Life: No degradation; ideal for catalog stocking and consistent availability
• Professional Appeal: Precision shops trust burr quality; reliable sourcing builds distributor credibility

Technical Specifications

Specification	Value
Head Diameter (d1)	2.5 mm
Head Length (L1)	2.7 mm
Shank Diameter (d2)	3 mm
Overall Length (L2)	38 mm
Flute Pattern	Cross-Cut (Multi-Flute)
Head Shape	Ball-Nose
Shank Type	Straight with Flat Faces
Material	Carbide or Hardened Steel
Typical Application	Internal Radii, Finishing, Tool Production

Real-World Application

The 3mm ball-nose burr excels in confined spaces and detail work:

• Internal corner blending on precision dies and molds
• Radius finishing on small component features
• Deburring and smoothing of tight internal geometries
• Tool production and rework where surface quality is critical

Value to Your Customers

When your customers finish complex internal contours with this burr, they get:

• Smooth, burr-free surfaces without secondary finishing
• Precision radii that hold tolerances
• Reduced tool changes—one burr handles multiple corner and radius sizes
• Extended tool life due to efficient flute design

Closing Statement

Stock this essential finishing burr to address the precision machining segment of your market. Pair it with complementary rotary tool options to create a complete finishing solution that keeps customers returning for reliable, quality tools.