Clearance Angles Page

Two types are available in either natural or synthetic diamond.
CONICAL CLEARANCE Representing the ultimate controlled waviness characteristics for this product group, Contour's conical clearance tools have a truly circular edge, guaranteed to be within 0.4µm and often in the order of 0.25µm. Tools can be manufactured with nominal radii of 0.1-1.0 mm. It should be noted that as standard, these tools have a 12.5° clearance angle and 100° of arc. Increased arc is available. 120° or more must be manufactured using a synthetic single crystal diamond. The accuracy of conical clearance is only seen when a 0° rake is used.
CYLINDRICAL CLEARANCE Where a relaxed work piece geometry can be tolerated, Cylindrical Clearance tools offer a suitable alternative. Cylindrical clearance tools have an elliptical form, which is proportional to radius size, clearance angle and rake angle. For example: for a 0.5mm radius, 100° arc, 12.5° front clearance and 0° rake will have an elliptical form deviating from a true circle by 0.4µm. This figure does not include manufacturing tolerances.