13
9.2.4 Excessive speed/feed indicators
A drill that splits up the web is evidence of too much
feed or insufficient tip clearance at the center as a
result of improper grinding. The rapid wearing away
of the extreme outer corners of cutting edges
indicates that speed is too high. A drill chipping or
breaking out at the cutting edges indicates that
either feed is too heavy or drill has been ground with
too much tip clearance.
10.0 User-maintenance
10.1 Drive belt replacement
Disconnect electrical power to
drill press to avoid possibility of inadvertent
operation and exposure to potentially lethal
voltage levels.
1. Start drill press. Set speed control to highest
speed. Stop drill press.
2. Disconnect machine from power source.
3. Remove pulley cover.
4. Remove belt. (With speed control setting at
highest speed, belt should be loose enough to
remove.)
5. Install replacement belt. Install pulley cover.
6. Connect drill press to power and run machine to
verify correct operation.
10.2 Motor replacement
Disconnect electrical power to
drill press to avoid possibility of inadvertent
operation and exposure to potentially lethal
voltage levels.
1. Remove drive belt (sect. 10.1).
2. Disconnect electrical wiring from motor junction
box.
3. Remove nuts from mounting studs securing
motor to drill head. Remove motor.
4. Remove upper and lower pulleys and related
components from motor shaft.
5. Install upper and lower pulleys and related
components on replacement motor shaft.
6. Install motor on mounting studs and secure with
nuts.
7. Connect electrical wiring (refer to wiring
diagram for details).
8. Install drive belt (sect. 10.1).
9. Connect drill press to power and run machine to
verify correct operation.
10.3 Lubrication
See Table 4 for lubrication points and
recommended frequency. Avoid getting oil or
grease on belts.
Figure 10-1
Lubrication points
Location
Recommended
lubricant
Frequency
Spindle splines
(A, Figure 10-1)
#2 lithium
based tube
grease
Monthly
Quill and
column
Machine tool oil Daily
Table raising
rack
SAE 20 oil
(clean rack with
kerosene
before oiling)
Weekly
Push rods (B,
Figure 10-1)
#2 lithium
based tube
grease
Periodically
as needed
Table 4
10.4 Additional servicing
Any additional servicing should be performed by
authorized service personnel.
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