Repair procedure for threaded bush without collar

Information 

• Remove wire thread inserts (Helicoil) that are installed as standard before drilling out  .

Overview of thread repair kits

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1. Loosen wire threaded insert (Helicoil) -1-  using a suitable screwdriver.

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2. Pull out wire threaded insert (Helicoil) -1-  .

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3. Drill out thread.
   1. 3.1. Drill out the old thread fully using special 3-flute drill bit  (contained in the set) -B-  .

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4. Cut thread.

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   1. 4.1. Cut thread up to dimension -Y-  using a cutting tool.
   2. 4.2. Clean the thread.
      1. 4.2.1. Blow drill chips out of the thread with compressed air.
      2. 4.2.2. Clean thread with brake cleaner.
      3. 4.2.3. Dry thread by blowing it with compressed air.
5. Position threaded bush on screw-in tool.
   1. 5.1. Screw threaded bush -1-  onto screw-in tool -2-  .

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      Check that the threaded bush -1-  is screwed fully onto the screw-in tool -2-  .

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6. Screw in threaded bush.
   1. 6.1. Screw in threaded bush -1-  fully using the screw-in tool -2-  .

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7. Unscrew and remove screw-in tool -E-  from the threaded bush -A-  .

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   Information 

   Heat threaded insert for a short time using a hot-air blower, Leister-Electron hot-air blower/V.A.G. 1416 WE 1119. → Time: 2 min → Temperature: 80°C  Alternatively, do not screw or unscrew threaded joints at the repaired thread for approx. 3-4 hours.

   • Heating or the specified waiting time is necessary in order to ensure that the threaded insert will not turn when you screw in the screw  .
8. Heat the thread.