These new Rotacaster® measure 125mm (5") in diameter, and weigh in at 272g (0.6lb) compared with the small ones that only weighed 37g. Both sizes us a standard LEGO Technic Axel whole. These Rotacaster®'s provide unlimited manoeuvrability and bring a whole new dimension of possibilities to the design and functionality of large wheeled LEGO Mindstorms NXT Robots.
As mentioned above, these new 125mm Omni-wheels from Rotacaster® Omni-wheels will allow you to construct robots that break away from the confines of indoor surfaces. Like the smaller 48mm [rotacasters], the quality is excellent. With a dynamic load capacity of 115kgs and a lateral load of 68Kgs, your LEGO Parts will fail before the wheels will. Due to the roller size, these Rotacaster® Omni-wheels a quite noisy compared with the smaller wheels when travelling on hard surfaces.
Full project details, including CAD Instructions at: www.rjmcnamara.com