Jet 691050, Operating Instructions And Parts Manual

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11.0 User-maintenance
Always disconnect machine
from power source before doing maintenance.
If you do not have knowledge or training to
complete the maintenance, have an authorized
JET service center maintain your mill. Failure to
comply may cause serious bodily injury.
11.1 General maintenance

During operation, occasionally vacuum and
brush chips and debris from machine.

Periodically operate knee and table lead
screws through full range of movement to
evenly distribute lubricant (particularly when
applied using the “one-shot” system).

Periodically apply light machine oil to work
table and other exposed metal surfaces to
prevent rust or corrosion.

Periodically remove side panels to check
pulleys and belts for unusual wear or grooving.
Operators should vary speed occasionally to
prevent groove formation on pulley surfaces.

When using a coolant pump, periodically clean
the sump in the machine base to extend pump
life and promote efficient cutting. Change
coolant regularly at intervals recommended by
coolant supplier.
11.2 Lubrication
Do not operate mill before
fully lubricating it. Failure to comply may cause
damage to machine.
Refer to Figures 11-1, 11-2 for lubrication areas:
Key Description
Recommend
ed Lubricant
Action
A
Grease fitting
(back gear) Mobilith AW1,
or equivalent
Service weekly
when operating in
back gear mode.
B
Oil cup
(clutch
bearings) Mobil DTE Oil
Light, or
equivalent
Service daily.
C
Oil cup
(spindle
bearings) Mobil DTE Oil
Light, or
equivalent
Service daily.
D
Auto lube
system (table
and knee
ways &
leadscrews)
Mobil Vactra
Oil #2,or
equivalent
Pump handle once
for every hour of
operation.
Check oil daily;
add if required.
E
Grease fitting
(knee
leadscrew)
Mobilith AW2,
or equivalent Service once each
week.
Table 5
Figure 11-1: Lubrication points
Figure 11-2: Lubrication points
11.3 Gib adjustments
Refer to Figure 11-3.
The table, saddle, knee and ram are equipped with
adjustable gibs. The gibs may require adjustment if
unusual vibration is noted when locking
mechanisms are off, or if you experience unusual
vibration when spindle speed, tooth pitch or depth
of cut do not account for the vibration.
NOTE: When adjusting table, saddle and knee
gibs, always start with knee first; adjust saddle
second, and adjust table last.
11.3.1 Knee gibs
Adjust gibs located between knee and column by
turning two adjustment screws beneath the wipers
(A, Figure 11-3). Use a dial indicator to measure
amount of movement in knee. Adjust gib until
indicator reading is within 0.003”.
11.3.2 Saddle gib
Adjust gib located between saddle and knee by
turning two adjustment screws (B, Figure 11-3) at
front and back of saddle. Use dial indicator to
measure amount of movement in saddle. Adjust
gib until indicator reading is within 0.003”.