... idler, spiral idler, comb sharp clean idler, taper shaped idler, steel idler and so on.Selecting a idler, Confirming some parameters ... , TD75Bearing NO: 6204/6205//6306/6307/6308 etcMaterial: carbon steel, Rubber , nylon etc.Belt width from 300mm to 2000mmBearing ... coefficient, waterproof, effective sealing system,(2). High accurate steel pipes ensure the rollers with low vibration and noise.(3 ...