Quote:
Originally Posted by Chris is me
In a drivetrain, with HTD belts, 24T pulleys and 9mm wide belts are riding on the edge of feasibility - these drives tend to fail belts by ratcheting and eventually tensile failure. I haven't experimentally determined how small of a pulley you can go to in order to safely use a 15mm wide belt - I'm sure I could estimate it with some math, I just haven't done it. I seem to recall 18T pulleys would cause 15mm belts to skip in a drivetrain, but I don't remember if that was speculation I heard someone else say or something actually based on real world experience.
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Hm, it would be nice to know whether an 18t HTD pulley will work with 15mm wide belts. I'm currently working on a WCD that would be using that setup, so I have a bit of a vested interest. For your purposes, since you're already machining your pulleys out of stock, couldn't you switch to GT3 belts and GT2 pulleys? there's not a huge difference, but it would give you some margin of safety for the the setups that are on the cusp of failure.