Mechanical Tooling Precision spherical forms

Diamond Balls

Diamond-surfaced spheres where you need an accurately shaped, wear-resistant contact.

Good to know

Construction may use a diamond coating over a supporting core.
Diameter, roundness and surface texture are separate inspection characteristics.
Probe mounting must be defined independently of sphere geometry.

What we define for diamond balls, with units and how each is typically measured. We confirm values for your application in technical review.

Parameter	Unit	Typical test method
Lateral size, outline or diameter, and tolerance	mm	Optical measurement
Roundness and sphericity	µm	Roundness measurement
Drawing dimensions and tolerances	mm	CMM or optical measurement to drawing

Parameter	Unit	Typical test method
Crystal type, grade and grain size		Raman spectroscopy or microscopy

Parameter	Unit	Typical test method
Surface roughness per side	nm Ra	Profilometry or AFM
Surface finish condition (as-grown, lapped or polished)		Visual inspection to drawing
Surface quality (scratch and dig)		Visual inspection (ISO 10110-7)

Parameter	Unit	Typical test method
Density	g/cm³	Archimedes method
Hardness and fracture toughness	GPa	Indentation (ISO 14577)
Wear resistance		Application wear test or pin-on-disc

Parameter	Unit	Typical test method
Coating construction and thickness	nm	Spectrophotometry, XRF or cross-section

Parameter	Unit	Typical test method
Mounting interface, host fit and attachment		Per drawing
Packaging, cleanliness and labelling		Per drawing
Certificate of conformance and traceability		Supplier declaration