[NSRCA-discussion] OS 1.40 Case

[Fred Huber]

If you can get 3 thin pieces of musc wire inserted... in the slots made to let the metal shavings out as you tap threads... you can usually work the broken tap out.

You have to work carefully... or you'll mess up the threads.  Typically the tap will have broken due to trying to go in too fast with the hole not pilot drilled to a large enough diameter, so it may catch on the burs it made as you try to extract it.  

Turn left 1/2 turn.
Turn right 1/4 turn.  
Remove the pin drive (3 wires) 
Shake out fragments of metal.  
put the pin drive back in.
repeat.

If you get a few threads of the tap exposed you can usually grab it directly with locking pliers. 
  ----- Original Message ----- 
  From: Ron Lockhart 
  To: NSRCA Mailing List 
  Sent: Sunday, June 17, 2007 7:55 AM
  Subject: Re: [NSRCA-discussion] OS 1.40 Case


  While on that subject, I'd be interested in a case, with good screws, retapped is OK if working well.
  Or if anyone has a solution to an 8-32 tap broken in exhaust port threads?

  Reply off list is good.
  Later, Ron Lockhart
    ----- Original Message ----- 
    From: Ken Velez 
    To: NSRCA Mailing List 
    Sent: Saturday, June 16, 2007 11:13 PM
    Subject: [NSRCA-discussion] OS 1.40 Case


    Hi all,

    I'm looking for an OS 1.40 RX case with the exaust port screws treads in original condition (not taped) or a parts engine with a good case or a used engine. Please reply off list.

    Thanks,

    Ken
    kvelez at comcast.net




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