carbide cylinder bore conversion (Bore Tech)

[FHPREMACH at aol.com]

In a message dated 1/11/99 3:39:54 PM Pacific Standard Time, bearbvd at sni.net
writes:

<< Yeah--as always, some luck will be needed. Your use of the words "solid
 lap" got me to thinking some more--mebbe the liner should be finished to
 the same bore as the polished bores in the block, but with a cross-hatch
 pattern from maybe #80 or #120 stones, and then be given the carbide
 treatment. The thought is that maybe this approach would give the lapping
 compound somewhere to "hide" and something to work against. What do you
 think??
 
 If Enco is Sears, does that make MSC = J C Penney's?? :-)
 
 Regards, Greg
 
  >>
On the solid laps they often cut a small spiral groove to carry the lapping
compound and let the swarf (removed material) float out of the way. Honing to
size would be best, be careful about how coarse a finish you leave. The peaks
will wear away and the lap will go oversize very quickly. Might try a small
spiral grove in the bore. Interestingly, when they lap Granite surface plates,
they use a cast iron plate, and charge (the term for applying lapping compound
to a lap) the lap with dry diamond powder by crushing it into the cast iron
with a hardened steel roller and then working the high spots down like block
sanding. Might work well as it would keep the lap from dying as quickly. You
could charge the lap with a rod and a radiused race bearing by rotating it in
a lathe.
As for MSC, it is more like Neiman Marcus in comparison.
Fred