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General Discussion » False Guide Interference .002"??? » 1/04/2022 8:47 pm

Snowshooze
Replies: 2

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Well...
  I went to the hardware store, bought up all their air chisel bits...
 Put one in my lathe, made a shouldered driver...
  It worked fine. 
  No longer ascart.
  Thanks,
 Mark

General Discussion » False Guide Interference .002"??? » 1/04/2022 12:40 pm

Snowshooze
Replies: 2

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Hi Guys;
  New member, experienced machinist just starting head work here.
  I tried driving in a false guide in a Caterpillar head, and killed it.
  The guide is 3" long and .5015" diameter OD, 3/8" bore.   
   Really, .0015" interference?  I did ream to .500" and she is right in there...
  I am a bit scared of the air-hammer... but if that is what it takes.. I'll go with it. 
  I had made an aluminum pilot punch and was using a 3# hammer. A lot like work.
   Also, is it better to drive from the top, like I did, or should I go from inside the bowl?
  My many thanks!
  Mark 

Gas Engines » Port and polish programs... » 10/18/2021 11:47 am

Snowshooze
Replies: 0

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Hi Guys;
  I am busy just trying to keep the business running...
    Customers want me to port and polish.
  Well, I am not an airflow dynamics Engineer, I don't own a Dyno... and no interest in either. 
  As I am a all-out CNC shop... I wonder...
     Is there a source for proven CAD models for various cylinder heads that I can just punch into my software and create tool-pathing?
  Thanks,
  Mark

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