Preformed Windings are obsessed with Quality. Based in Sheffield, UK, we have more than 55 years’ experience in delivering the highest quality high voltage diamond coils for motors and generators. In independent product specialists we do not compete with service organisations, instead supporting there strategies for growth. We serve a global client base from a wide range of industries, including power generation, water, transport and shipping. Whilst operating out of the UK, the majority of our products are shipped to a global base of partners including the most respected OEM's and service companied in the world. We are the supplier of choice when quality is key and have built a reputation for having the highest quality coils in the world that improve the performance and life of assets while reducing maintenance requirements.