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5.7 Assembly
The assembly must take place without the use of undue force. The assembly instructions of the machine manufacturer
should be referred to. Unless otherwise noted, all screws must be tightened crosswise in 3 steps to the prescribed torque.
Assembly procedure
The assembling method of the gear depends strongly on the design details. Thus, this assembly manual only provides general
guidelines. In exceptional cases, the assembly procedure may differ from those described herein.
Basically first the Circular Spline (CS) and Flexspline (FS) should to be mounted and screwed down. The assembly of these
two components can take place in any order. The Wave Generator (WG) should be shifted at last into the pre-mounted
components Flexspline/Circular Spline.
If the assembling sequence described above cannot be observed please ask Harmonic Drive® whether in the concrete case
another sequence is admissible.
Note:
Before the Wave Generator is set in position, the Circular Spline fixing screws must be tightened. Otherwise the Circular
Spline would deform under the pre-load initiated by the Wave Generator. This could cause the gear to run roughly.
For the planning of the assembly sequence it may be helpful to know the max. diameter of the Wave Generator. In table 43.1
the diameters of the Wave Generator main axes are indicated, please also see illustration 43.2.
Table 43.1
Size
ca. ∅ Wave Generator
- Main axis
Illustration 43.2
5.7.1 Assembly of the Circular Spline (CS)
The Circular Spline must not be bended during the assembly. Therefore it is particularly important that the mounting base of the
Circular Spline is absolutely even and that the mounting base centering causes neither clamping strength nor radial clearance.
Explanation:
A slightly deformed Circular Spline can result in irregular running characteristics. If a deformation of the Circular Spline is
suspected it should be verified whether the Circular Spline can rotate freely within its locating bore in the machine housing
without any friction. Even slight friction may be an indicator for a possible radial deformation of the Circular Spline. In this case
the tolerances of the machine housing and the Circular Spline must be checked.
For grease lubrication the Circular Spline teeth must be lubricated in accordance with section 5.7. The assembly is to be executed
considering section 5.7 and table 43.1.
1019659
11/2014
14
17
20
36
43
50
25
32
40
63
82
100
[mm]
45
50
58
114
125
146
43
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