Yaskawa Sigma II Series DC Power Input SGMAJ - Manual (Page 56)

3.3 Mechanical Specifications of SGMMJ and SGMAJ Servomotors
3-15
3
(5) Vibration Class
The vibration class for the servomotors at rated motor speed is shown below.
Vibration class: 15
µm or below
(6) Protective Structure
The standard protection class for the protective structure is IP55 except for shaft opening.
3.3.3 Mechanical Characteristics of SGMAJ Servomotors
(1) Mechanical Tolerance
The following table shows tolerances for the servomotor’s output shaft and installation area. For more details on
tolerances, refer to the dimensional drawing of the individual servomotor.
(2) Direction of Servomotor Rotation
Positive rotation of the servomotor is counterclockwise when viewed from the load. (Same as for servomotors
with gears.)
Vibration Class
A vibration class of 15 µm or below indicates a total vibration amplitude of 15 µm maximum on the servomotor during
rated rotation.
TERMS
Position for measuring vibration
Tolerance T. I. R. (Total Indicator Reading) Standard With gears Reference Diagram
A
Perpendicularity between the flange
face and output shaft 0.04 mm
(0.00157 in)
0.06 mm
(0.00236 in)
B Mating concentricity of the flange O.D.
0.04 mm
(0.00157 in)
0.05 mm
(0.00197 in)
C Run-out at the end of the shaft
0.02 mm
(0.000787 in)
0.04 mm
(0.00157 in)
Positive direction