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  1. henschen

    Gear Quality Rating

    Am working on a planetary gear train, and I am getting gears in at a lower gear quality rating (Q5 rather than Q7) than I specified. What is the impact of the lower quality gears...durability, noise...? I need to know what my risk is to use these gears. What characteristic am I most likely to...
  2. henschen

    1021M vs 1022

    For a fastener, is there an advantage to using 1021M or 1022 steel, or are they basically the same material? What does the 'M' suffix signify?

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