Aqui esta el link de baldor http://www.baldor.com/products/produ...s%5FSevereDuty, el de US motors http://www.usmotors.com/default_products.htm, siemens http://www.sea.siemens.com/machine/default.html, ABB http://www.abb.de/product/es/9AAC100523.aspx?country=US.
Saludos