31-05-2018, 09:02 AM
(This post was last modified: 31-05-2018, 09:06 AM by Bob Culver.)
It is odd that the machinist did not finish. Did you bore yourself?
The parallel stone spring loaded deglazing hones can be acquired cheap 2nd hand as little use for nowdays. These not primarily intended for finishing after rebore because of rapid stone wear, but the amateur is unlikley to ever wear out. Books emphasise the cross hatch. I rebored a set of liners in lathe and finished with spring deglazing hone. All turning marks must go and very slight size adjustment can be made. Books reckon typically .001 to .0015 dia to clean up.
The rigid hones which precision correct and maintain dimensiosns are less easy to come by, and require more skill. (Although can do the whole rebore with)
The attraction of the ball hones is that do not ride on any wear steps, and less easily broken. Doubt if intended to finish after rebore.
Great emphasis is placed on cleaning of bore with detergent until a white paper unmarked.
For spring loaded parallel stones 280 was the standard grit, finer for modernes with modern OE rings..
The parallel stone spring loaded deglazing hones can be acquired cheap 2nd hand as little use for nowdays. These not primarily intended for finishing after rebore because of rapid stone wear, but the amateur is unlikley to ever wear out. Books emphasise the cross hatch. I rebored a set of liners in lathe and finished with spring deglazing hone. All turning marks must go and very slight size adjustment can be made. Books reckon typically .001 to .0015 dia to clean up.
The rigid hones which precision correct and maintain dimensiosns are less easy to come by, and require more skill. (Although can do the whole rebore with)
The attraction of the ball hones is that do not ride on any wear steps, and less easily broken. Doubt if intended to finish after rebore.
Great emphasis is placed on cleaning of bore with detergent until a white paper unmarked.
For spring loaded parallel stones 280 was the standard grit, finer for modernes with modern OE rings..