Alpha
Alpha SM-3DC Cone Pointed Carbide Burr — 1/4″ Double Cut
Part No: SM-3DC | Barcode: 9342386017311 | Shape: SM — Cone (Pointed)
The Alpha SM-3DC is a 1/4″ (6.35mm) cone (pointed) double cut carbide burr with a 1/2″ 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.
1/4″ Head Dia.
Double Cut
1/4″ Shank
1/2″ 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.
- 60° cone angle — matches standard countersink geometry for consistent chamfers and V-groove finishing.
- 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 SM-3DC (1/4″ head) for countersinking, chamfering holes, V-grooving, and creating angled recesses. The 60° cone angle matches standard countersink geometry for consistent chamfers. The 1/4″ size is suited for fine detail work and tight clearances. 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 Cone Pointed Carbide Burrs — SM Series Double Cut
| Part No. | Head Dia. (in) | Head Dia. (mm) | Flute Length | Overall Length | Shank |
|---|---|---|---|---|---|
| SM-3DC ★ | 1/4″ | 6.35mm | 1/2″ | 2″ | 1/4″ |
| SM-5DC | 1/2″ | 12.70mm | 7/8″ | 2-5/8″ | 1/4″ |
★ You are viewing the highlighted variant. Other sizes in this series are also available.
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