Festo 548076, Repair Instructions, Page: 85 / 92

85 / 92 Festo 7DHTGd_en
7. Insert ball bearings into the housing.
Note
The number of ball bearings depends on the size of the rotary indexing table
(see Table).
Type Number of ball bearings
DHTG-65-…-A 1
DHTG-90-…-A 2
DHTG-140-…-A 2 or 3
DHTG-220-…-A 2 or 3
Ensure that the top rail of the ball bearings is not pressed down into the
housing. The balls of the ball bearings must run between the rails, otherwise
the plate may not be able to move and the balls of the ball bearings and the
rails could be irreparably damaged.
Note
When screwing in the clamping ring the plate seal can be pulled into the
joint between the plate and housing.
In this case, pull the plate seal out of the joint before screwing in the clamp-
ing ring any further. To this end, guide a flat, blunt object next to the pulled
in area under the seal and use it to move along the seal until the sealing lip
completely lies on the housing.
8. Tighten the clamping ring using two pin punches and a hole profile (or
another suitable lever tool).
To tighten the clamping ring, the rotary indexing table must be held in place
(if necessary, with the help of a second person or by fixing the rotary index -
ing table).
The correct preload of the guide segments is reached when the index hole
(arrow) is level with the screw hole and the clamping ring is flush with the
plate surface.
For design reasons, there are two screw holes in sizes DHTG-65 and DHTG-90.
The correct pretension is achieved with the hole marked during removal.
9. Screw the flat head screw into the plate and tighten to the appropriate tight -
ening torque (see table).
Type Torque
DHTG-65-…-A 0.6 Nm
DHTG-90-…-A 0.6 Nm
DHTG-140-…-A 0.6 Nm
DHTG-220-…-A 0.6 Nm