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Introduction Edit

In medieval nut and trigger locks the contact surfaces of the nut and the trigger are highly stressed and prone to wear. One way to reduce wear is to reinforce the contact surfaces with hardened steel, as described in this article. For more ideas on how to reduce wear, look here

The process step-by-step Edit

Sart by cutting a wedge-shaped piece of hardeneable steel, such as spring steel. Then cut a matching wedge-shape to the trigger and put the whole package together using a vise:

Reinforcing trigger with contact surface with high-carbon steel - 01

Grind grooves to the contact surfaces of the wedge and the trigger and weld them together:

Reinforcing trigger with contact surface with high-carbon steel - 02

Grind away excess steel after this, then heat treat the tip.

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