How to find the right Convex Radius Milling Cutters AI guide
Written by an AI model from its trained knowledge.
What the AI looks for in Convex Radius Milling Cutters
- Radius / groove width
- The cutter's radius equals the radius of the semicircular groove it cuts, so the groove width is twice the radius for a full half-round. These are fixed-form cutters, so size them to the final groove.
- Arbor bore and keyway
- The bore must equal your arbor size, commonly 1 in or 1-1/4 in, or 22, 27 or 32 mm, and the cutter must have a standard keyway. Correct fit keeps the profile concentric and transmits torque.
- Form-relieved teeth
- Look for form-relieved teeth that are sharpened on the face only. Face-only sharpening preserves the radius after regrinding.
- Material
- Cobalt HSS for steels; M2 HSS is adequate for non-ferrous metals and mild steel. The full radius engages the work along its whole length, which generates heat.
Brands that matter
- KEO: US maker with an extensive line of HSS arbor form cutters.
- Somta: Wide HSS arbor cutter range.
- Niagara Cutter: US-made HSS milling cutters.
- HHIP: Low-cost imports for light-duty work.
What to avoid
- Taking the full groove depth in one heavy pass on a light mill. Rough first with a slitting or side cutter.
- Listings that do not state the radius and bore explicitly.
Questions
Is a convex cutter the same as a ball end mill?
They produce a similar groove, but a convex arbor cutter mounts on a horizontal arbor and cuts long grooves more rigidly, while a ball end mill works in a vertical spindle.