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Electroplated Diamond Hole Saw Small Plastic Kit For 7 Pcs Bits and 1 Pcs Plastic Drill Guide
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Electroplated Diamond Hole Saw Small Plastic Kit For 7 Pcs Bits and 1 Plastic Drill Guide
Diamond Hole Saw.pdf
Checking Diamond Drill/Bit Run Out
Bring the indicator close to drill, until its spring just touches the surface of the drill. The dial of the
indicator should indicate 0. Turn on your drilling machine, holding the indicator firmly in place. The
dial of your indicator should remain at 0 while your drill is running (rotating). This means you have
no drill run out. If your indicator is greater than zero, your drill is running out. Turn off your drilling machine, and remount the drill. A black marker, is an alternative if you have don’t have an indicator available.
Take a piece of paper or any thin piece of material, measuring its thickness using a caliper or micrometer. Place the material firmly against the drill. Holding the marker firmly in place, remove
material between drill and marker. Turn on your drilling machine and observe drill rotation. If the
marker touches surface of the drill, there is too much drill run out. Turn off drilling machine, and try
again.
Another effective way of checking drill run out, is rotate the drill head assembly (including the water
swivel adapter, if your drill has this feature) by hand. The run out of the drill diamond section (the cutting/drilling edge) will be indicated by the stem. A strong correlation exists between the run out on
the water swivel adapter and on the diamond drill—the larger the run out on the water swivel adapter,
the larger the run out will be on the drill. If the run out is not properly indicated, the drilling operation
will not be accurate.
You should also ensure that your drilling accessories are properly held in the chuck. If the drill or
drilling device is not running true, loosen the chuck of your drilling machine, turn it 90 degrees and
run your drill again. If this does not work, examine condition of your equipment. Mount the drill on
another drilling machine. Make sure your drilling equipment is in proper condition to accomplish
your objectives. No matter how well the diamond drill is made, it will not give you close tolerances
if the shaft, or chuck of your drilling equipment is misaligned or vibrates.
If for some reason you feel there is a manufacturing defect, please return the drill where it was
purchased with a note explaining the difficulty. Defective drills will be repaired or replaced. Drills improperly used will be repaired or replaced at users expense.
Drilling Speeds
To maximize the life of your drill and minimize material damage, it is important to run your drills at the proper drill speed and pressure. Drilling speeds vary with diameter of diamond drill, diamond mesh size, coolant being used, diamond bond type and hardness, as well as material hardness. Micro Diamond Drills from .001” required drilling speeds as high as 150,000+ RPM. Whereas very large diamond drills 48” diameter require drilling speeds as low as 3 RPM’s.
Below is a chart of Recommended RPM's (speeds) in correlation to diamond drill/bit diameter. Please note this chart is for reference purpose only to be used as starting point only. RPM's will vary with material being drilled, material hardness, density, geometry, drilling depth, environment, and operator objectives.
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