Technological information management is an efficient tool in the competitive context. It helps firms to find better solutions for productive problems and new business possibilities. Usually, information about product and process innovation is generated and managed by R&D staff. But what about firms that do not have R&D structures? Do they also collect, choose and apply technological information? This paper investigates informal R&D activities in three SMEs of Mechanics Industry in Brazil. Discussing topics as innovation, learning, accumulation of knowledge and skills, technological changes and strategic positioning, we found that informal R&D activities are not continuous, but moved by need of solving problems. Most of new ideas are generated by blue-collar employees, using creativity, experience and knowledge. Research demonstrated the importance of informal R&D activities in technological capability analyses.