Jet Tools GHD-27 Mode D'emploi page 5

For example:
Drilling mild steel with a drill bit of
20mm allows a speed of
400 RPM max.
2000 RPM max. with carbide tool
7. Setup and adjustments
Warning:
Setup and adjustment work may
only be carried out after the
machine is protected against
accidental starting.
Push the emergency stop button
and disconnect from the power
source!
7.1 Changing spindle speeds
Speeds may only be changed at
complete spindle standstill.
WARNING:
Changing speeds during spindle or
motor rotation will damage the
gears and switch.
Refer to the speed chart whenever
changing speeds.
7.2 Tool replacement
MT3 tools can be ejected from the
spindle by activating the tool eject
lever (K).
If the lever is swivelled out, the spindle
can run all the way into the housing
where at the same time ejecting the
MT3 tool.
For normal operation the tool eject
lever must be swivelled back in place.
7.3 Adjusting the Depth Stop
GHD-22, GHD-27:
To drill multiple holes at the same
preset depth, use the depth stop
(G, Fig 2)
GHD-27PF:
To drill multiple holes at the same
preset depth, use the depth stop
(P, Fig 5)
7.4 Engaging the power down feed
(GHD-27PF)
Adjust the drill depth stop (P, Fig 5).
with HSS tool
Adjust the desired power down feed
(R).
Engage the clutch (Q) to activate the
power down feed mechanism.
Engage down feed by pushing out the
down feed handles (S).
The spindle will feed down
automatically until the drill depth stop
has been reached.
The spindle will return to the top by
spring force.
CAUTION:
Do not let feeding depth exceed
spindle stroke.
If not in use disengage the power
down feed mechanism (Q).
8. Maintenance and inspection
General notes:
Maintenance, cleaning and repair
work may only be carried out after
the machine is protected against
accidental starting.
Push the emergency stop button
and disconnect from the power
source!
Clean the machine regularly.
Defective safety devices must be
replaced immediately.
Repair and maintenance work on the
electrical system may only be carried
out by a qualified electrician.
8.1 Annual Lubrication:
- Gearbox:
Change the hydraulic oil
DIN 51517-2 CL ISO VG 68
(e.g. BP Energol HLP68, Castrol Hyspin
AWS 68, Mobil DTE Oil Heavy Medium)
Oil must be up to indicator mark in oil
sight glass.
Fill oil by removing oil filler plug..
Fig 5
7
Drain oil after first month of
operation by removing drain plug.
Drain entire oil and refill with oil.
Then change the oil in the gearbox
annually (respectively every 700
operating hours).
8.2 Daily Lubrication:
Daily apply oil:
CGLP DIN 51502 ISO VG68
(e.g. BP Maccurat 68, Mobil Vectra 2)
- Spindle quill
Apply oil on entire length.
8.3 Coolant system
Pour 8 litres of coolant mix into the
coolant tank (D).
Follow coolant manufacturer's
recommendations for use, care and
disposal.
9. Trouble shooting
Motor doesn't start
*No electricity-
check mains and fuse.
*Defective switch, motor or cord-
consult an electrician.
Machine vibration
*Stand on uneven floor-
adjust stand for even support.
*Tool deflection-
reduce tool length.
*Dry spindle quill-
lubricate spindle quill.
*Dull tool tip-
resharpen or change tool.
*Chip load too high-
reduce depth of cut or feed-
Tool tip burns
*Cutting speed too high-
reduce spindle speed.
*Dull tool tip-
resharpen tool tip.
Drill leads off
*cutting lips or angle not equal-
resharpen drill bit correctly.
*drilled hole off centre-
drill a pilot hole first.
*bent drill bit-
use a proper drill bit.
*drill bit not properly installed-
install drill bit correctly.