Posted by Janicholson on July 29, 2012 at 05:56:19 from (96.24.99.126):
In Reply to: Ball Hone posted by equeen on July 29, 2012 at 00:08:41:
Four types of hone: Machine controlled Honing (Pro rebuilders) Sunnen Brand style straight hone center pivot hard abrasive hone Ball Hone The pro rebuilders use Machines that drive the hard abrasive stone axially through the cylinder in alignment with the boring bar that was used to resize that bore. (jasper engine rebuilders and many others use that machine shop floor model tool. The Straight hone is a parallel actuated honing system that can make a cylilnder correctly cylindrical and straight, but follows the axis of the cylinder as found (floats in the cylinder) It is best in all ways for surfacing a bore that needs to be sized to a piston after machining. The center pivoted stone based hones, and the ball hones are not ever used (correctly) to change straightness, or roundness, or axial alignment. Both are surface finish modifiers for placing a compatible cross hatching on the metal of the cylinder wall. both conform to the existing shape of the hole, and do not correct wear. Both of these should not be used for material removal as they can (and do) make trumpet shaped irregular wear at the ends of thrir travel if attempts are made to use them for sizing. Jim
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