9. Readjusting the main spindle
The headstock is screwed to the lathe bed. The headstock contains the main spindle with two
adjustable precision tapered roller bearings.
If adjustment is required, proceed as follows:
1. Open the gear cover hood by undoing the safety screw with the supplied special key
2. Undo the stud screw (1) in the setting nut (2)
3. The setting nut (2) is located at the rear end of the main spindle
4. Rotate the setting nut (2) clockwise until the bearings run free again (it must be possible to rotate
the main spindle by hand easily)
5. Tighten the stud screw (1) back up again
6. If the tapered roller bearings are set too tightly they will quickly become unusable
7. Close the gear cover hood by tightening the safety screw with the supplied special key
10. Overload coupling
In order to prevent risks to the user and damage to the machine, an overload coupling has been fitted
to the lead screw.
The overload coupling (11) is effective:
■ When the feed is overloaded
■ When contact is made with an end stopper in the longitudinal direction
If adjustment is required, proceed as follows:
1. The overload coupling (11) is set using the hexagonal nuts (38) and countered with the nut (46).
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