TTR ERA 4400
Scale drum for incremental modular angle encoder 
without integral bearing
Line count:              10000
Grating period:          40.000 µm
Accuracy of the          
graduation:              ± 3.0 ''
Geometry of drum:        Outside Ø 127.64 mm, 
                         inside Ø 80 mm, hole 
                         circle Ø 95 mm, 6 holes Ø
                         5.5 mm, with centering 
                         collar
Reference mark:          1 reference mark
Mechanical permissible   
speed without mechanical 
fault exclusion:         12250 min-1
Mechanical permissible   
speed with mechanical    
fault exclusion:         6250 min-1