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  1. C

    Building a model Drag Saw

    Mechanism Design vol 1 Arthur G. Erdman et al. Ibuprofin can be sourced locally. Isn't there a clutch showing in your photo? Possibly a small cone type?
  2. C

    Any idea what metal I may have? (55HRC)

    We make gun parts from 4140 Prehard HRC52+-. Rigid holding, good quality carbide cutters. Then we don't have to deal with warping post heat treat to get the needed tensile. Hope you don't have any warpage as you machine. Sounds like your metal was hardened accidentally and not necessarily...
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