CSF CSG PDF - Harmonic Drive LLC

Assembly Procedure7. Ensure that the surface used for installation is flat and not skewed.8. Ensure that the installation surface does not have any burrs orforeign substances resulting from screw threading operations.9. Ensure sufficient clearance to prevent interference between theFlexspline and installed parts.10. When a bolt is inserted into a bolt hole during installation,make sure that the bolt fits securely and is not in an improperposition or inclination.11. Do not apply torque at recommended torque all at once. First,apply torque at about half of the recommended value to all bolts,then tighten at recommended torque. Order of tightening boltsmust be diagonal.12. Ensure that the Flexspline and Circular spline are concentricafter assembly.13. Do not damage Flexspline diaphragm or gear teeth during assembly.Note: For proper lubrication, please refer to lubrication requirements, p. 21-24.Assembly Order for Basic Three ElementsThe recommended sequences of assembly are illustrated below.Only after the Circular Spline and Flexspline are assembled in equipment is the Wave Generator assembled.If assembly is performed using a different method, Dedoidal assembly or teeth breakage may occur.It is essential that teeth of the Flexspline and Circular Spline mesh symmetrically for proper function.An eccentric tooth mesh (Dedoidal), will result in noise and vibration and may lead to early failure of the gear.When flexspline andwave generator areassembled, open partof flexspline will expandat major axis.flexsplinewave generatorcircular splineNote:1. Avoid assembling with excessive force on Wave Generator bearing.Insert Wave Generator as you rotate it.2. If the Wave Generator does not have an Oldham coupling, specialconsideration must be given to ensure that concentricity andinclination are within the specified limits. ( see page 27).31