Single Crystal Diamond Planetary Scaif Benches

Coborn’s Planetary Scaif benches are generally used to polish facets on single crystal diamond tools. They may also be used in gem diamond polishing. The bench combines the high speed rotation of a scaif plate with a relatively slow, smooth, horizontal planetary motion. The planetary motion speed is variable between 0-50 cyclesminute.
This motion gives a number of advantages over a standard scaif:
The plate does not become tracked as polishing takes place over an annular band. The scaif surface remains smooth and flat.
The motion results in a constantly changing angle of attack: this gives a ‘self-zooting’ action producing line free facets without manual work.
In many situations the tang can be set on the machine and the diamond or tool left to polish
‘Knarted’ stones become easier to polish as the angle of attack constantly changes.
All planetary benches are fitted with a 2.2kW, adjustable height spindle. The working height of the plate surface can thus be re-established after the plate has been remachined. PS benches can be supplied with either a fixed (type A) or adjustable (type B) planetary stroke. An inverter drive can be fitted as an optional extra.