Siemens offers direct drive torque motors in two configurations: 1FW3 and 1FW6. These motors are permanent-magnet synchronous torque motors that work in applications with low driving speed and high torque. The compact 1FW3 is a water-cooled motor available in IP rating 54 with a high overload capacity (up to 2.5 times rated torque) and a wide hollow shaft allowing new and innovative machine designs. It has a maximum rated speed of 800 RPM, and a static torque of up to 5275 lb-ft. The built-in 1FW6, also water-cooled, is rated for IP 23 and offers a high overload capability of up to two times rated torque. The 1FW6 has a maximum rated speed of 650 RPM, and a maximum torque of up to 8040 lb-ft.