How do I choose the ball radius for a small curved feature?
Start with the part surface and the radius required by the toolpath. Compare the listed ball radius R and cutting diameter D with the local curvature and adjacent walls. A matching diameter alone does not establish access or the required finished profile.
Can the same-diameter NBS, DBS and EBS models be treated as equivalent?
Keep the three series separately identified. Compare the complete model record, ball radius, cutting length and holding dimensions, then specify the workpiece and any material or coating requirement. Matching dimensions do not establish identical construction, application suitability or cutting behaviour.
Does the nominal micro ball diameter give the cutting speed at every contact point?
No. The engaged portion of a ball tip changes with the cut and surface orientation, so the working cutting diameter may differ from the nominal diameter. Provide the toolpath and engagement for technical review; a nominal diameter alone is not a complete speed recommendation.
What should be checked before approving a micro ball nose trial?
Record the selected model, ball radius and cutting length, then document holder projection, the runout assessment and the actual workpiece and path. Agree the dimensional and surface-finish result to evaluate. The trial needs those conditions to make a later comparison meaningful.
Will a micro ball nose cutter leave a flat-bottomed feature like a square-end tool?
Its rounded working profile differs from that of a square-end cutter. Select the profile against the part drawing and planned path rather than substituting the tool by diameter. For a flat working-end requirement, review the square-end micro tool range separately.
What should a distributor include in a micro ball nose quotation list?
List NBS, DBS or EBS full model codes and quantities separately, together with the required ball radii and lengths. Include the workpiece, application and sample acceptance requirements. Keep any marking, individual protection and delivery requirements attached to that specific assortment.