TTR ECA 4400
Scale drum for absolute angle encoder without 
integral bearing
Line count:              44000
Accuracy of the          
graduation:              ± 2.0''
Geometry of drum:        Outside Ø 560.46 mm, 
                         inside Ø 512 mm, hole 
                         circle Ø 528 mm, 18 holes
                         Ø 7 mm, with centering 
                         collar
Mechanical permissible   
speed:                   1500