Extraction Fixture #3
Here is another fixturing solution that I use from time to time when disassembling traditional multi-gear freewheels. In this case the single cog acts as one wrench. I attempt to unscrew that end-cap object with my adjustible wrench (crescent wrench). The right sized box wrench would be 22mm, but I don't have that. 7/8" is close, and I do have that, but the flats are too thin. This fixture failed.
Extraction Fixture #3
Here is another fixturing solution that I use from time to time when disassembling traditional multi-gear freewheels. In this case the single cog acts as one wrench. I attempt to unscrew that end-cap object with my adjustible wrench (crescent wrench). The right sized box wrench would be 22mm, but I don't have that. 7/8" is close, and I do have that, but the flats are too thin. This fixture failed.