Thread Repairs For Threaded Bushes With Collar

Information 

• The repair bush must be installed recessed. Use the tool from the tool set for milling the relevant shoulder. 

Information 

Information 

• While pressing in the base thread, a noticeably larger amount of force on the screw-in tool is required to form the internal thread. Pressing is finished when the screw-in tool can be turned further more easily. 

Information 

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

1. Drill out the old thread fully using a drill bit (contained in the set) -B-  .

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   Thread

2. Mill in shoulder using countersink tool -C-  .
   Fig 1: Checking Shoulder Dimension

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   Shoulder

3. Cut thread.
   1. 3.1  Cut thread to dimension -Y-  using a cutting tool.
   2. 3.2  Clean the thread.
      1. 3.2.1  Blow drill chips out of the thread with compressed air.
      2. 3.2.2  Clean thread with brake cleaner.
      3. 3.2.3  Dry thread by blowing it with compressed air.
         Fig 2: Checking Thread Cutting Dimension

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         Thread

4. Position threaded bush on screw-in tool.
   1. 4.1  Clean thread on bush and on screw-in tool.
   2. 4.2  Oil the screw-in tool -E-  .
   3. 4.3  Screw threaded bush -A-  onto the screw-in tool -E-  by hand.

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      Threaded bush on screw-in tool

5. Screw in threaded bush -A-  fully using the screw-in tool -E-  .

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   Threaded bush

6. Form and press the threaded bush by turning further with the screw-in tool -E-  in the base thread.

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   Threaded bush

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

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   Screw-in tool