Available. TTR_ECA_4402_178;55_120;00_14003_00_01. The Heidenhain TTR ECA 4402 is a scale drum designed for absolute angle encoders without an integral bearing. It features a line count of 14,003, providing high-resolution angle measurements. The drum's geometry includes an outer diameter of 178.55 mm, an inner diameter of 120 mm, and a hole circle diameter of 140 mm with six holes of 5.5 mm each, facilitating precise mounting. The graduation accuracy is ±2.0 arc seconds, ensuring exceptional precision in angle detection. This scale drum is capable of operating at mechanical speeds up to 8,750 revolutions per minute (min⁻¹), making it suitable for high-speed applications. For detailed specifications and mounting instructions, refer to Heidenhain's official product page.