Position of breather valve/oil drain plug in motor flange
As shown in the mounting position sheets, the position of the breather valve/oil drain plug depend on the gearmotor mounting position.
The following table lists the position of the breather valve and the oil drain plug depending on the mounting position.
Mounting position | Breather valve position | Oil drain plug position |
|---|---|---|
M1, M3, M5, M6 | In the gear unit housing | In the gear unit housing |
M4 | In the motor flange | In the gear unit housing |
M2 | In the gear unit housing | In the motor flange |
If the breather valve (M4 mounting position) or the oil drain plug (M2 mounting position) is positioned in the motor flange, the position depends on the terminal box position.
The positions of the breather valve/oil drain plug in the mounting position sheets always refers to the standard terminal box position 0°. Note that the position of the breather valve/oil drain plug is changed depending on the possible terminal box positions (90°, 180°, 270°).
The following figure shows the exact position of the breather valve or oil drain plug in the motor flange.

[A] | Position of breather valve/oil drain plug | [d] | Diameter of countersinking |
[B] | Continuous core drilling | [l] | Thread length |
[C] | Counterbored bore | [a] | Flange diameter |
[α] | Drill angle | [β] | Position angle |