Truing

The wheel slides are purposely slightly under-compensated, causing the work to approach an oversize condition after several truings.

As many as twenty titanium alloy test specimens can be ground between truings.

CBN^([cubic boron nitride (abrasive)]) wheel roundness to within .0001 inches (.0025mm) is considered satisfactory; however, roundess^([sic]) to 1 micron (.000040 inches) or less will extend the number of parts between truings.