Restoring a very nice adjustable wrench made by "Peugeot Freres". This wrench was probably made in the late nineteenth century judging by the markings (lions on arrows) and brand name that both changed over time. All the marks in this wrench are related to the first production that started in November 1858.
I decided to weld the broken jaw so I can get some use out of this beautiful wrench because this steel is weldable (the french marking "tout acier forgè" means "all in forged steel"). And I also re-hardened the movable jaw because high heat from welding process had tempered to soft the steel near the teeth for sure.
Index of operation and materials:
0:50 Clean the movable jaw with wire wheel
1:16 Center punch at the end of the crack
1:27 Drill hole with carbide tip bit, the steel is pretty hard
1:58 Grind a grooves for the welds with die grinder
2:42 Stick welding to fill all grooves and voids
3:40 Remove excess weld with angle grinder, die grinder and file
4:40 Remove some material from jaw to make it parallel with the other on the 2x72 belt grinder
5:10 Hardening. Take the steel up to 850°c and quench in warm vegetable oil
5:40 Removing some scales on the wire wheel
5:45 Tempering to 200°c for 2hr
6:00 Final clean again on the wire wheel
6:23 De-greasing the wrench body
6:50 Electrolysis bath to remove all rust. Just water and a 12v battery charger
7:40 Final clean again on the wire wheel
8:10 Small parts, de-greased with nitro solvant and ultrasonic cleaner
8:37 De-rusted with MC-51 rust remover and ultrasonic cleaner
9:10 Refining the head shape of the screw with needle files
9:30 Finishing the steel with cold blue
10:03 And a good coat of synthetic oil
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