Deltronic 1mm to 20mm Metric Micro Ball Set, 60 Metric Balls – MB60

Deltronic Metric Micro Ball Set - MB60

Three balls of each mm size from 1mm thru 20mm included. (Total of 60 Metric Balls.) Clear lid for Gage-Set case protects from dust and rust. Labeling allows immediate identification of sizes in every slot.

Metric Tolerance: within 2 microns (0.002mm) for size, 1 micron (0.001mm) for sphericity

1. Checking micrometers at the exact spot for wear, as shown at point 'A,' where Micro Balls are ground and lapped to a sphericity of .001mm.
2. Checking wall thickness from the inside curve to the flat on the outside end.
3. In turning and grinding, where shoulder locations with respect to each other or to a common end are held close (.001”/.025mm), it is imperative that the depth of the center drill be maintained. Choose a Micro Ball that is tangent to a center and measure overall as 'A' or indicate the distance as 'B.'
4. Checking the depth of valve seats, ways, slots, etc.
5. For boring of collets, select a set of Micro Balls that match the width of slots on the collet. Coat the Micro Balls with grease or Vaseline before inserting. Close the collet and bore."