How to use a metal wedge is fairly straightforward and often contradicts how they are used by current manufacturers. Often they are used right at the time they are hung. Although Gransfors Brukshas now stopped that practice.
The basic concept is to tighten a loose axe head. The key word being loose. Far too many people and manufacturers try to put them in right from the start which is a mistake. Primarily because if the axe head is hung tight then a metal wedge isn’t needed. You’ll also have a heck of a time driving it in. That’s why most manufacturers are forced to use hydraulic presses. Finally, if you put a metal wedge in and the head does become lose then you aren’t left with many options besides putting in another metal wedge. It’s why old axes eventually become magnets for debris.
The proper way is to put in a metal wedge is after the head becomes loose. Then you also have room to pound it in.
When placing a metal wedge it should run parallel to the existing wooden wedge. Not only will that stop it from splitting the wood and possibly the handle but it will direct pressure towards the largest surface area.
Don’t be fooled into using tiny hammer wedges that look pretty. Choose the largest wedge you can find so you are essentially double wedging the entire eye.
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