Alpha
Alpha SD-3DC Ball Carbide Burr — 3/8″ Double Cut
Part No: SD-3DC | Barcode: 9342386017038 | Shape: SD — Ball (Spherical)
The Alpha SD-3DC is a 3/8″ (9.53mm) ball (spherical) double cut carbide burr with a 5/16″ flute length and 1/4″ shank. CNC precision-ground from premium tungsten carbide for chatter-free material removal on steel, stainless steel, cast iron, and non-ferrous metals.
3/8″ Head Dia.
Double Cut
1/4″ Shank
5/16″ Flute Length
Tungsten Carbide
66,000 RPM Max
Suitable For
Mild Steel
Stainless Steel
Cast Iron
Tool Steel
Non-Ferrous Metals
Hard Facing Alloys
Key Features & Benefits
- CNC precision-ground flutes — delivers consistent cutting performance with reduced vibration and longer tool life across repeated use.
- Double Cut flute pattern — double-cut cross-flute pattern that produces finer chips than single-cut, resulting in a smoother surface finish with less chatter on ferrous metals.
- Full spherical cutting profile — uniform contact at any approach angle for rounding, hole enlarging, and blending internal radii.
- Premium tungsten carbide head — maintains cutting edge hardness at high temperatures, outlasting HSS burrs significantly.
- High-quality alloy steel shank (HRC 45–49) — resists deflection and breakage under load, ensuring safe operation at full RPM in die grinders and rotary tools.
When to Use This Burr
Choose the SD-3DC (3/8″ head) for concave cuts, rounding internal corners, cleaning weld joints in tight spaces, and enlarging holes. The full-sphere profile provides uniform contact at any angle. The 3/8″ size is suited for medium-duty shaping and edge preparation. Use with a 1/4″ collet die grinder at speeds up to 66,000 RPM — reduce speed for larger diameters and harder materials for best results.
Authorised Australian Dealer — This product is sourced directly from Alpha Australia and is backed by full Australian manufacturer warranty and local support.
Alpha Ball Carbide Burrs — SD Series Double Cut
| Part No. | Head Dia. (in) | Head Dia. (mm) | Flute Length | Overall Length | Shank |
|---|---|---|---|---|---|
| SD-1DC | 1/4″ | 6.35mm | 7/32″ | 2″ | 1/4″ |
| SD-2DC | 5/16″ | 7.94mm | 9/32″ | 2″ | 1/4″ |
| SD-3DC ★ | 3/8″ | 9.53mm | 5/16″ | 2-1/8″ | 1/4″ |
| SD-5DC | 1/2″ | 12.70mm | 7/16″ | 2-1/4″ | 1/4″ |
★ You are viewing the highlighted variant. Other sizes in this series are also available.
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