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@REPLYADDR Bob La Londe <none@none.com99>
@REPLYTO 2:5075/128 Bob La Londe
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On 9/27/2023 4:06 PM, Jim Wilkins wrote:
> "Bob La Londe" wrote in message news:uf2bu8$3aqmh$
1@dont-email.me...
>
> I can`t imagine trying to remove more than a few tenths with one of
> these adjustable hones, but it did resize the sleeve inside the head. I
> think I wound up a tiny bit over sized in the end, but it worked well
> enough. It didn`t result in out of spec parts for the machine. To be
> fair the manuals for the machine says it should hold .003 or better, but
> until I had mechanical failures in the ballscrews it tended to hold
> about .001 over its length of travel as long as I kept parts cool.
>
> --------------------------
>
> When reconditioning a hydraulic pump to the tightest tolerances I could
> manage I found that raising the table instead of extending the quill
> held bore diameter better.
>
>
Of course it does. Less stick out and less flex. Same thing on a
lathe. Heck its the same principal as using a screw machine drill
instead of an air craft drill. Its shorter and stiffer. I wasn`t
talking about that. I was talking about that there are hones that ARE
designed to hone to a consistent diameter. There is one in the bottom
drawer of my big roll-a-way right now. One I actually used to hone a
cylinder to an "exact" tolerance fit with a "piston" (the quill).
Another advantage to using the table instead of the quill is if the head
isn`t in perfect tram your oval bore will still be straight from top to
bottom.
--
Bob La Londe
CNC Molds N Stuff
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