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In addition to providing a positive method to insure that a
slug is not retracted with the cutter, the ejector rod serves
as a conduit for the cutting fluid and as a centering guide for
positioning the Mag Drill on the workpiece. Under normal
conditions, the point of the ejector rod should be kept at
least 1/16" above the work surface.
It is important that the point of the ejector rod not be
allowed to rest on the work surface for two reasons:
A) The point will drag on the work surface when Mag Drill
is repositioned which may cause the ejector rod to
become bent.
B) The ejector rod may hold the front of the magnet off of
the work surface, deminishing its holding ability.
GEAR COMBINATIONS FOR VARIOUS RPMS
Gear
Case
Cover
Remove
Screws
Drawings above show arrangement of gears. Be sure that upper and lower washers are replaced on Shafts A
and B when changing gears. If necessary, refer to exploded view when removing lower bearing retainer cap.
No. of Teeth per Gear
Cutter
RPM
Shaft A
Motor High Speed
120
18
332
30
Motor Low Speed
70
18
200
30
EJECTOR ROD ADJUSTMENT
Drill unit comes with 18-tooth gear on Shaft A and 30-tooth gear
on Shaft B to provide 120 RPM. For other RPM's, use optional gears
with the following procedure.
1. Remove the Lower Bearing Retainer Cap by removing the five
Cap screws.
Shaft B
2. Use two threaded holes to ease cover off. Remove gears from Shafts
A and B, being careful to save the two Altered Torrington Thrust
30
Washers and two lower Washers.
3. Be certain that the two Altered Torrington Thrust washers are
18
first mounted on Shaft A and B.
4. Slide proper gears on Shafts A and B (refer to table on left).
5. Mount lower washers on both shafts.
30
6. Pack gears with liberal supply of grease.
18
7. Replace Lower Bearing Retainer Cap. Replace and tighten all
six cap screws.
7
To adjust the ejector rod:
1.
Place the Mag Drill on a steel plate and turn the
magnet on.
2.
Loosen the lock nut and rotate the knurled nut until the
point of the ejector rod is in the desired location.
3.
When adjusted properly, the point should clear the
work surface (1/16" minimum) both when the magnet
is on and when it is off (Mag Drill riding on glide post).
4.
When adjustment is complete, using a wrench,
retighten the lock nut against the underside of the tie
bar.
Altered Washer
B
Gear
Lower Bearing
Retainer
Cap
A
Lower Bearing
Retainer
Washer
Motor
Shaft
B
Gear
Spline Shaft
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