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Setting the spindle speeds
Important
Always disconnect the mains plug before working on the drive
gearbox. Risk of injury.
The spindle speed must be adjusted to suit the work piece
material and diameter.
Calculating the maximum spindle speed
The required spindle speed can be calculated when the speci-
fied maximum cutting speed for a certain material is known.
Maximum permissible spindle speed
Cutting speed x 1000
=
Working piece diameter x 3.14
Example:
A work piece with a diameter of 20 mm is to be turned at a cut-
ting speed of 50 rpm.
50 x 1000
= 796/min
20 x 3.14
By shifting the V-belt (Fig. 10), set to the next highest speed. In
this case, the speed is 1600 rpm. The correct speed is now set
via the controls, and here is important to note that the controls
cover a speed range of 25% to 100%, i.e. in our example, 400
rpm to 1600 rpm.
1. Release the clamp screw from the drive gearbox and open
the flap.
2. Release V-belt tensioner 1 (Fig. 10).
3. Adjust the relevant speed by shifting the V-belt according to
Fig. 11.
4. Re-tighten V-belt tensioner. Note the appropriate tension of
the V-belt. Overtensioning increases the wear of the belt
and bearing and reduces the motor power.
5. Close the drive gearbox before commencing turning work.
Clamping the work piece in the lathe
chuck
Important
If work pieces are clamped in the lathe chuck using the tail-
stock without a steady, the projection (Fig. 12) must not be
greater than three times the diameter of the material
(L = 3 x D).
Note:
The normal lathe chuck has three steel jaws, which are uni-
formly adjusted and centre round work pieces automatically.
In the normal position, work pieces can be clamped up to a
diameter of 35 mm. After turning the jaws, it is possible to
clamp up to a diameter of 68 mm.
1. Turn the lathe chuck 2 (Fig. 12) using the wrench 1 until the
work piece fits in the mount.
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All manuals and user guides at all-guides.com
Do not leave the wrench in the lathe chuck. Risk of injury.
2. Clamp the work piece tightly and remove the wrench from
3. Check the running of the work piece and correct if neces-
Clamping a longer work piece which has been guided through
the spindle and is projecting to the left increases the risk of
injury. In this case, be particularly careful to ensure that no
objects are caught in the rotating shaft. Protect this zone sep-
arately by fuse.
Exchanging the clamping jaws (Fig. 13)
Remove mains plug.
Do not clamp work pieces with a diameter greater than
68 mm. The clamping force of the jaws is then too small and
the work piece may become loose. Danger of accident.
In order to clamp work pieces externally (e.g. for clamping solid
steel bars with greater diameters, the included outside jaws
must be inserted into the chuck instead of the factory-mounted
inside jaws.
To reverse or exchange the jaws, please proceed as follows:
1. Disconnect the mains plug to prevent the machine from
2. Use the chuck key to screw out the jaws as far as possible
3. Reverse or exchange the jaws and reinsert. During the pro-
4. Screw down the chuck with the chuck key and check the
5. If you want to work with the inside jaw chuck again, repeat
Switching on the machine
Before switching on the machine, ensure that the jaw chuck
wrench is not in the chuck, the jaws are not protruding and
that there is no-one in the danger zone.
Activation of the machine while clamping pins are in the chuck
holes can fling these out or lead to jamming during starting.
Danger: Serious injuries or material damage may result as a
consequence of this!
Only switch on the machine when the part to be turned is
clamped in the chuck, as otherwise the jaws could become
loose and cause injury.
Always work within the intended performance range! Avoid
spindle blockages caused by overloading. In the event of the
Important
the chuck.
sary.
Important
Important
Important
starting up unintentionally.
so that they can be removed from the chuck.
cedure, please pay attention to the identification: Numbers
(1, 2, 3) have been imprinted on the jaws!
centricity of the jaws. If required, correct the position of the
jaws by reinserting in the chuck body so that the jaws grip
the spiral in the correct position.
the steps described above in the reverse order, i.e. first
insert jaw nos. 1 and 2, and then 3.
Important
Caution:
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