Wilton 7020/7040 - Manual (Page 13)

14
tion of the disk you have cut from the bar stock. Mea-
sure at the top and bottom of the disk.
The saw blade can be considered correctly adjusted
when the variation measure is no more than 0.012 inch
across the face of the disk.
If you do not have a piece of 2-inch bar stock avail-
able for a test cut, use a larger diameter test piece
rather than a smaller one. The maximum thickness
variation on any test piece should be no more than
0.003 inch, per side, per inch of stock diameter.
Adjustment of the Limit
Switch
1. The limit switch is provided to shut off the saw motor
when the workpiece is cut through.
2. To set the limit switch, loosen the jam nut on the limit
switch stop (figure15).
3. Adjust the stop as required and retighten jam nut.
Maintenance
Cleaning
1. Clean off any preservative on machine surfaces.
2. After cleaning, coat the machined surfaces of the
cut-off saw with a medium consistency machine
oil. Repeat the oil coating process at least every
six months.
3. Clean up accumulated saw cuttings after use. Make
sure the lead screw is kept free of saw cuttings and
other material that would cause damage.
4. Clean the chip sludge from the coolant tank. The
frequency should be determined by how often the
saw is used.
Lubrication
Lubricate the following components at the specified
frequencies and using the lubricants as defined:
the center locking screw with an Allen wrench (see
figure 12).
4. Position the bearing by turning the bushing. Set
the clearance at approximately 0.001 inch. (The
blade should be in a vertical position between the
bearings. (See figure 13.)
5. Tighten the center locking screw with an Allen wrench
while holding the eccentric bushing in position with
the 3/4-inch wrench.
6. Use the same procedure to adjust the other guide
bearing.
7. When the adjustment is correct, the guide bear-
ings should rotate freely with slight pressure of the
finger (with the blade stopped).
8.Adjust blade-edge bearings so they just touch
the back edge of the blade (see figure 19).
Test Cutting to Verify
Adjustment Accuracy
Test cuts can be used to determine whether or not
you have adjusted the blade accurately. Use 2-inch
round bar stock to perform these test cuts, as follows:
1. With the bar stock securely clamped in the vise,
make a cut through the bar stock. (See figure 14.)
2. Mark the top of the bar stock.
3. Move the bar stock about 1/4-inch past the blade so
you can begin a second cut.
4. Rotate the bar stock 180 degrees so the mark you
made is now at the bottom of the cut.
5. Make a cut through the bar stock.
6. Use a micrometer to measure the thickness varia-
Figure 14: Cutting a test disc
1. Clamp in vise and mark top
of barstock here
2. Cut off a slice of
the bar stock
3. Rotate stock in vise
so mark is at bottom
4. Cut off a new
slice from the
stock
5. Measure
here...
New slice
7. Differences between
measurements at edges
of disc should be less
than .003 inches per
inch per side of stock
diameter
6. ...measure
here
Jam Nut
Adjustment
Screw
Switch
Roller
Limit
Switch
Figure 15: Limit switch adjustment