Lesson 1 - Why is tightening technique important?

Reference material, including videos, pocket guide, and glossary

Video 1 - Why is tightening technique important? (5:07)

• What is needed to make a proper assembly?

• Why use bolted joints?

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Video 2 - What is clamping force? (4:38)

• What is pre-load and tensile force?

• What is friction?

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Video 3 - Example of bolted joint (5:24)

• How does the pre-load influence the bolt?

• What is torque?

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Video 4 - What happens when friction changes? (4:39)

• When we have oil on threads?

• When we have a corroded bolt?

• When we add a washer?

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Video 5 - Ways of changing friction

• Loctite, locknut, paint in threads, damaged threads, weld slag, bolt finishing

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Pocket guide - audio version (8:50)

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Supplemental material:

  • Tightening Technique - Pocket Guide - Lesson 1.pdf 2.1 MB, PDF

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