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BA 5846 en 05/2015
Table 6: Variant description Taconite seal
Variants of
the Taconite
seals
Application Remarks
"E"
All input shafts with or without fan
Re-chargeable labyrinth
"F"
Output shaft
Type S:
Type V:
(Solid shaft)
(Solid shaft, reinforced)
"F‐F"
Output shaft
Type H:
Type K:
(Hollow shaft with parallel keyway)
(Hollow shaft with splines to
standard "DIN 5480")
Labyrinth re-chargeable on both sides,
incl. dustproof cowl to prevent contact
on gear-unit side facing away from
output
"F‐H"
Output shaft
Type H:
Type K:
(Hollow shaft with parallel keyway)
(Hollow shaft with splines to
standard "DIN 5480")
Labyrinth re-chargeable on output
side; dustproof cowl on opposite side
"F‐K"
Output shaft
Type D:
(Hollow shaft for shrink disk)
NOTICE
Material damage
Leakage of the gear unit is possible through insufficient sealing.
For recharging the labyrinth seals with grease, the specified frequency must be observed (see table 17
in item 10.1).
5.7 Backstop
For certain requirements, the gear unit can be fitted with a mechanical backstop. The backstop permits
only the specified direction of rotation during the operation of the unit. The direction of rotation is marked
by a direction arrow on the input and output side of the gear unit.
The backstop is fitted oiltight on an adapter flange on the gear unit and integrated in its oilcirculation
system.
The backstop is fitted with centrifugally operated sprags. If the gear unit rotates in the prescribed direction,
the inner ring rotates with the sprag cage in the direction of shaft rotation, while the outer ring remains
stationary. From a specific speed up (disengagement speed) the sprags disengage from the outer ring.
In this operating condition the backstop operates wearfreely.
6
5
3
4
2
1
Fig. 13: Backstop
1 Outer ring
2 Inner ring
3 Cage with sprags
4 Shaft
5 Sealing cover
6 Residual-oil drain
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