Quick answer

Choose the SL-4 NF taper for narrow contours and rounded edges in tight spots, the SE-3 NF oval for contouring and blended rounded edges, and the SB-3L cylinder end cut for flat faces and finishing right-angle corners. All three are Aluma Cut tungsten carbide burrs with a 1/4-inch shank for die grinders.

What the Aluma Cut designation changes for aluminum

Aluma Cut is the flute style on these burrs, and it matters most on aluminum because the soft, gummy chip behavior is different from steel. The catalog does not list flute counts or cut classifications beyond the Aluma Cut name, so treat the shape as the reliable differentiator and confirm the cut style suits your material before ordering.

The catalog also states these tungsten carbide burrs handle more demanding jobs than high-speed steel. That hardness supports longer life, but it does not replace correct speed, feed, and chip clearance on aluminum.

Where shape matters more than cut style

On a die grinder, the burr shape controls reach and contact area. A taper reaches into narrow contours; an oval spreads contact for contouring; a cylinder with an end cut presents a flat face for milling and corners. If you are already set on Aluma Cut, pick the shape by the geometry you need to produce, not by the burr that looks most versatile.

The trade-off is that no single shape covers all three jobs well. A taper is awkward for flat face milling, while a cylinder end cut is clumsy for blending tight rounded edges.

Aluma Cut shape questions answered

Which Aluma Cut burr should I use for a rounded edge?

Use the SE-3 NF oval for general rounded edge processing, or the SL-4 NF taper when the rounded edge sits in a narrow contour the oval cannot reach. If the edge is open and accessible, start with the oval.

When is a cylinder end cut burr the right choice?

Pick the SB-3L cylinder end cut for interior contour work, peripheral and face milling, and finishing right-angle corners, because the end cut gives you a flat cutting face.

Can one Aluma Cut burr handle taper, oval, and cylinder jobs?

No. The three shapes have different contact geometry, so a taper will not mill a flat face and a cylinder will not blend a tight rounded contour as cleanly. Plan on the shape that matches the majority of your work.

Will these fit my die grinder?

All three listed burrs use a 1/4-inch shank, the common die grinder size. Check your tool's collet size before ordering; the catalog does not list other shank options for these items.

Does Aluma Cut mean I can run any speed on aluminum?

The catalog does not publish speed or RPM ratings for these burrs, so follow your die grinder and accessory guidance rather than assuming a fixed speed. The Aluma Cut flute style is intended for aluminum, but it does not remove the need to manage heat and chip clearance. Test on scrap aluminum before committing a workpiece.

Product facts