45
1019658 11/2014
5.7.4 Gears with Oil Lubrication
Harmonic Drive® Units with oil lubrication are generally customer-specific solutions. Please follow the notes given on the
confirmation drawing and refer to table 33.2 for allowed oil types. The oil temperature during operation must not exceed
90° C. Oil must be filled into the unit by the customer as the standard delivery does not include any oil lubricant.
Oil Quantity
The values specified in the confirmation drawing include the valid oil quantities to fill in. The oil quantity defined
on the confirmation drawing must be obeyed in any case. Too much oil results in excessive heat production and
early wear due to the thermal destruction of the oil. If the oil level is too low, this may lead to early wear as a result
of lubricant deficiency. See illustration 45.1 and table 45.3.
Operating Positions
Wave Generator above
Wave Generator perpendicular
Wave Generator below
B = Oil level
B = Oil level
Illustration 45.1
A = Oil level
Table 45.2
The required oil quantity is dependent on the design. Therefore, the quantity specified in the drawing/service manual of the
machine is decisive for the oil quantity to fill in. Please also consider illustration 45.1 and table 45.3. The defined oil levels must
be obeyed in any case. Too much oil results in excessive heat production and early wear due to thermal destruction of the oil.
If the oil level is too low, this may lead to early wear as a result of lubricant defiency.
When the gear is to be used with the Wave Generator above or below, special consideration must be given because even small
changes of the oil level affect the churning losses.
Minimum amount of oil
Size
14
17
20
25
32
40
45
50
58
Liter
0.01
0.02
0.03
0.07
0.13
0.25
0.32
0.4
0.7
Oil levels
Size
14
17
20
25
32
40
45
50
58
A
10
12
14
17
24
31
35
38
44
B
2.5
3
3
5
7
9
10
12
13
[mm]
Table 45.3
