Title: Repair threaded holes.
Course: Small Engine Repair (20110-36) > Section: Demonstrating the Use of Tools

Repair should include

- identifying the thread geometry (i.e., depth, diameter, pitch)
- selecting the appropriate repair and replacement method
- selecting the appropriate repair tools and fixtures (e.g., tap, wrench, die, thread-cert, Heli-Coil)
- performing the repair
- testing effectiveness of the repair.

Process/Skill Questions:

- What causes the hole to have to be repaired?
- What are the different thread pitches? How can one tell which thread pitch to use?
- What is cross-threading? How can it be prevented?

Teacher Resources:

- Thread Chart (UNF-UNC) - Major and Minor Diameters, Echo Engineering and Production Supplies