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  1. Thoomy

    Belt pulley diameter - grinding machine

    Thanks for the answer. You calculated the 55mm diameter from the gear ratio from EM to d5? Or from the rpms on grinding disc and the EM?
  2. Thoomy

    Belt pulley diameter - grinding machine

    Yes, the machine had the V-belts before, but we will install a bit bigger EM which wwon't fit on the existing mounting plate. Therefore the axial distance changes so longer belts are required. That chatter is not so important since the discs we are machining mostly are old-used ones bent for...
  3. Thoomy

    Belt pulley diameter - grinding machine

    @electricpete Yes it is and induction motor, running at around 2900-3000rpm. The grinding disc (d5) is on the same shaft as d4 pulley on the picture (so equal RPM for both). @Tmoose You guessed it correctly, it has some old flat belts without grooves. Only the belt from EM to the first...
  4. Thoomy

    Belt pulley diameter - grinding machine

    Hello to all, I had a discussion with my coworkers about a brake disc grinding machine that is pretty old, regarding the optimum diameter of driver pulley. We will put a new EM on it together with new driver pulley. We have the info from the grinding disc manufacturer about maximum allowed...
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