Use and Care Manual

15
For very high production on cutting of special
materials, or to work hard-to-cut materials such as
stainless steel, tool steel, or titanium, ask your
industrial distributor for more specific blade
recommendations. Also, the supplier who provides
the workpiece material should be prepared to
provide very specific instructions regarding the best
blade (and coolant or cutting fluid, if needed) for the
material and shape supplied.
9.7 Blade break-in procedures
New blades are very sharp and, therefore, have a
tooth geometry which is easily damaged if a careful
break-in procedure is not followed. Consult the
blade manufacturer’s literature for break-in of
specific blades on specific materials. However, the
following procedure will be adequate for break-in of
JET-supplied blades on lower alloy ferrous
materials.
1. Clamp a round section workpiece in the vise.
The workpiece should be 2 inches or larger in
diameter.
2. Set saw on low speed. Start cut with a very light
feed rate.
3. When saw has completed 1/3 of cut, increase
feed rate slightly and allow saw to complete the
cut.
4. Keep the same settings and begin a second cut
on the same or similar workpiece.
5. When blade has completed about 1/3 of cut,
increase feed rate. Watch chip formation until
cutting is at its most efficient rate (sect. 9.5) and
allow saw to complete the cut. The blade is now
considered ready for regular service.
10.0 User-maintenance
Always disconnect power to
machine before performing maintenance.
Failure to do this may result in serious personal
injury.
10.1 General cleaning
Keep wheels clear of chips and debris.
Keep slide areas (such as vise ways and T-slot,
slide for bow swiveling, and behind scale where
blade brackets slide) clean and oiled. Make sure
vise lead screw remains free of cuttings or other
obstructions.
Keep a light coat of SAE 10W oil on machined parts
to inhibit rust.
10.2 Lubrication
All ball bearings are permanently lubricated and
sealed; they require no further attention.
Coolant – Maintain proper coolant level. Clean chip
sludge from coolant tank and hose as needed.
Replace coolant on a frequency appropriate to type
of coolant being used. Oil-based coolants can sour.
Refer to coolant supplier’s instructions for
frequency.
Vise lead screw – apply a light oil monthly.
Hydraulic cylinder pivot – apply a light oil every 6
months.
Blade tension screw – grease every 6 months.
Wire brush bearing – apply a light oil monthly.
10.2.1 Hydraulic system
If it is necessary to fill the hydraulic cylinder with oil,
proceed as follows:
1. Lift bow slightly (about 15°) and place a block
beneath bow to hold it.
2. Turn cylinder cover (B, Figure 9-1) counter-
clockwise, then fill with hydraulic oil or
equivalent.
3. Retighten cylinder cover.
10.2.2 Gearbox
The gearbox has been pre-filled by the
manufacturer. After first 50 hours of use the gearbox
should be drained and refilled. After that check oil
once a year.
1. Remove drain plug (B, Figure 10-1) and allow
lubricant to drain completely. Reinstall drain
plug.
2. Remove oil fill plug (A) and fill gearbox with
850mL (0.9 qt.) of Mobil
TM
SHC 634 gearbox oil,
or equivalent. Replace fill plug.
Figure 10-1
10.3 Belt replacement
De-tension belt (see sect. 7.5). Slip old belt off
pulleys and install new belt. Re-tension belt and
tighten knob.
New belts may stretch slightly as they get broken in,
so belt tension should be re-checked after a period
of use.