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Your Model G1004/G1008 milling machine
requires very little maintenance. A thorough
cleaning, now and again, will increase the
machine’s durability and efficiency by removing
chips and grime that can gum up moving parts.
An occasional application of a protective spray
coating will keep the table and other bare metal
parts from rusting and pitting.
REMEMBER: When performing maintenance or
repairs on shop equipment, always disconnect
the machine from its power supply.
The G1004/1008 milling machine table features
tapered gibs in the dovetail ways. To tighten the
table, loosen the screw at the small end of the
tapered gib and tighten the screw at the large
end. Use the same procedure for the saddle and
knee gib adjustments.
Spindle: Add oil to the oil cup after every 4 hours
of use. The cup is located on the right portion of
the milling head just under the belt guard. SAE 20
oil is recommended.
One Shot Lubricator: Located on the left side of
the knee. Check periodically and fill oil reservoir
as necessary with SAE 20. This lubricator will
supply oil to the knee, apron and table slides. By
pulling the lever you will apply enough oil for a 4
hour period of use.
Flood Coolant System: For best results it is rec-
ommended that a water soluble oil be used.
Replace coolant when it becomes noticeably con-
taminated or rancid. Take the time to clean the
sludge from the bottom of the tank annually.
Access to the tank may be made from the right or
left panels on the stand/base.
Table and Apron Lead Screws: Lubricate every
day with SAE 20 oil. A few drops applied on each
side of each nut.
Lead Screw Bearings: Lubricate the bearings
located at the ends of the table and just in front of
the Y axis hand crank. You will find oil ports with
a ball stopper. Lubricate daily. Apply small
amount of SAE 20 using an oil can with a pointed
nozzle to help push in the ball.
General
Most of the bearings are factory-sealed. A sealed
bearing requires no lubrication during its lifetime.
Should a bearing fail, your mill will probably
develop a noticeable rumble, which will increase
when the machine is put under load. If allowed to
get worse, overheating of the journal containing
the bad bearing could occur. If the bad bearing is
not replaced, it will eventually seize – possibly
doing damage to other parts of the machine.
Bearings are standard sizes and can be replaced
through Grizzly.
Quill bearings are under a lot of pressure (pre-
loading). If not maintained properly, they will wear
out prematurely. You will need to partially dis-
mantle the machine once a year to repack the
bearings. Please call the service department for
instructions about repacking your quill bearings.
Bearings
Lubrication
Gibs
SECTION 7: MAINTENANCE
G1004/1008 Vertical Milling Machine