Product Detail
Corner Radius / Bull Nose End Mill
Corner radius / bull nose carbide end mills when defined radius strength beats sharp square corners.
Geometry · Corner strength / bull nose
Need a defined corner radius for tool strength—when is bull nose better than sharp square?
Partial radius · ferrous walls. Bull-nose / corner-radius tools keep most of a square wall but add a programmed corner radius for strength. Full spherical contact is the ball-nose series; sharp 90° walls are square end mill.
Naming note: Bull nose end mill searches map to this corner-radius intent—body-text aka, not a redirect merge.
Radius decision ladder
- Print allows/requires corner radius R → stay here
- Print demands sharp corner → square end mill
- Full ball envelope / 3D blend → ball nose
Fits corner-radius carbide
- Pocket floors meeting walls with specified R
- Corner chipping on sharp tools is the failure mode
- Material is steel/stainless/CI (Al PCD square/ball stay on PCD hubs)
Bull-nose RFQ fields
- Material grade
- Ø, LOC, corner radius value
- Wall/floor tolerances; allowed blend
- Machine/holder/runout
- Sharp-tool corner chip history if replacing
Corner radius FAQ
Bull nose vs ball nose?
Bull nose = partial corner radius on an otherwise square tool. Ball nose = spherical end for 3D contact.
Stock radii only?
Quote from the R callout on your print.
Al PCD?
Use PCD square/ball series for aluminum abrasive walls/contours.
R value on the print?
Corner-radius RFQs need the radius number and material—not a generic square packet.