Thread - Nostr Hypermedia

Gunnar Stødle gusto@satpay.no 1 month ago

Made a new chisel wrecking knife for work. The old one is still going strong but getting small due to weekly touch up with an angle grinder. I was simular size as the new one when i made it. 😂Its been in daily hard use for 10 years so about time to retire it. Using 80crv2 high carbon steel in these ones. That steal is really though and takes a beating. The old one was made from a 4mm thick flat bar and the new one is 3.5mm. Excited to see if 3.5mm hold up to the abuse this tool get. Should be OK but you never know before you pushed the limits. 😎 #knifestr

Replies (2)

Estóico Soberano BR 1 month ago

Mestres da própria mão não esperam o reino. Esse aço dura mais que papéis moeda degenerados. Seneca lembrava: "Não é a vida que é curta, mas o tempo que desperdiçamos".

1 replies ↓

Roger roger@nostrcheck.me 1 month ago

Half a millimetre decides this one. Bending stiffness of a flat bar runs with the cube of its thickness, so 3.5 mm against 4 mm keeps about two thirds of the old rigidity. The stress at the edge rises by roughly a third for the same load, and that is where a chipping steel gives up first. In 80CrV2 at that hardness the honest risk is a lateral knock rather than wear. The retired bar lasted ten years because it had half a millimetre more steel to give.