Tool Angle; Lathe Chuck; Head Spindle Seat; Adjusting The Speed - Jet BD-11G Operating Manual

5.4.2 Tool angle

ATTENTION!
The tool must be clamped with its axis perpendicular to the axis of the work- piece. If it is clamped at
an angle, the tool may be sucked into the workpiece.

5.5 Lathe chuck

The workpieces must be clamped firmly and securely onto the lathe before they are machined. The clamp should
be tight enough to ensure that the workpiece is moved cor- rectly, but not so tight that it is damaged or deformed.
Clamp the workpiece into the lathe chuck with the aid of the chuck key provided.
WARNING!
Do not clamp any workpieces that exceed the permitted chucking capacity of the lathe chuck. The
clamping force of the chuck is too low if its capacity is exceeded. Also, the jaws might work loose.

5.5.1 Head spindle seat

The head spindle seat is designed as a short-taper seat. For the installation of a quantum four jaw chuck a chuck
flange is necessary.
ATTENTION!
When disassembling the machine a workpiece holder might fall on the engine bed and might damage the guide rail.
Put a wooden board or another appropriate part on the engine bed in order to prevent damages.
Unscrew the 3 nuts on the flange for the lathe chuck to remove the workpiece holder (in this case, the three-jaw
chuck).
Take the workpiece holder off.
If necessary, loosen the workpiece holder by hitting it gently with a plastic-tipped hammer or a rubber mallet.

5.6 Adjusting the speed

Adjust the speed by changing the position of the V-belt on the pulleys.
With the equipment variant, the speed can be regulated within the corresponding speed ranges with the aid of a
frequency converter. The speed can then be adjusted using the potenti- ometer on the control panel of the lathe.

5.6.1 Protective cover of the headstock

In order to change the speed or feed, you must first remove the protective cover.
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