154-66-230,Wheel 18.69 mm, 21AT3/20-2
| External diameter | 18.69 mm |
| Bore | 4 mm |
| Number of teeth | 20 |
| Temperature range | -30...+80 °C |
| Description | Timing pulley 21AT3/20-2 |
Cast synchronous belts with suitable wheels. Large belt volume in relation to belt height combined with steel reinforcement gives increased force transmission capacity. The reinforcement also contributes to greater division accuracy which makes series AT especially suitable for positioning operation. The combination of synchronous belt and wheel with a close tooth gap gives gap free and safe function. Wheels are available in 2 models, with and without end pieces. Wheels with end pieces are used to guide the synchronous belt sideways. However, a rule of thumb is that you should use as few wheels with an end piece as possible in synchronous belt operation. The wheels need to be processed (drilling and threading) if a stop screw will be used for fastening.
