Drilling Operation; Setup And Adjustments; Turning Between Centres; Taper Turning With Tailstock - Jet GH-2040ZH Mode D'emploi

6.7 Drilling operation

Use a drill chuck with MT-5 arbour (option) to hold
centring drills and twisted drills in the tailstock.
For recommended speeds refer to section 6.4
To eject the drill chuck, fully retract the tailstock quill.

7. Setup and adjustments

Warning:
Setup and adjustment work may only be carried out
after the machine is protected against accidental
starting.
Turn off the main switch and press the emergency
stop button!

7.1 Turning between centres

Mount the workpiece fitted with the drive dog between
centres.
The driver is driven by the drive plate (Fig 11).

7.2 Taper turning with tailstock

Turning up to a side angle of 5° can be achieved by
off-setting the tailstock.
To offset the tailstock (max +/-15mm possible),
Fig 11
Loosen the locking handle, loosen the front adjusting
screw and take up the same amount on the rear
adjusting screw.
Tighten the adjusting screws and the locking nut to
hold the tailstock in position.
The workpiece must be held between centres and
driven by the face plate and drive dog.
After taper turning, the tailstock must be returned to
its original position.
Turn a test piece and adjust until the machine turns a
perfect cylinder.

7.3 Taper turning with top slide

By angling the top slide, tapers may be turned.
Loosen two nuts and rotate the top slide according to
the graduated scale.

7.4 Three jaw universal chuck

With this universal chuck, cylindrical, triangular and
hexagonal stock may be clamped (Fig 12).
To hold big diameter stock, reverse the top jaws.
Use Molykote Paste G (or adequate grease) to
lubricate the jaws.
14
Fig 12