Drill Bits

Some articles on drill, drill bit, drill bits, bit:

Drilling Rig - Drill Types - Reverse Circulation (RC) Drilling
... drilling is similar to air core drilling, in that the drill cuttings are returned to surface inside the rods ... known as a "hammer" driving a tungsten-steel drill bit ... dry rock chips, as large air compressors dry the rock out ahead of the advancing drill bit ...
US Number and Letter Gauge Drill Bit Sizes
... Number drill bit gauge sizes are analogous to, but different from, American wire gauge ... It happens that as the technology for making small drill bits and drilling small holes has become more available, metric measurements have become the norm ... Number and letter gauge drill bits are almost always twist drill bits ...
Metal Drill Bits - Center and Spotting Drill Bits - Use in Spotting Hole Centers
... Traditional twist drill bits may tend to wander when started on an unprepared surface ... Once a bit wanders off-course it is difficult to bring it back on center ... A center drill bit frequently provides a reasonable starting point as it is short and therefore has a reduced tendency to wander when drilling is started ...
Fractional-inch Drill Bit Sizes
... ANSI B94.11M-1979 sets size standards for jobber length straight shank twist drill bits from 1/64 inch through 1 inch in 1/64 inch increments ... For morse taper shank drill bits, the standard continues in 1/64 inch increments up to 1¾ inch, then 1/32 inch increments up to 2¼ inch, 1/16 inch ... One disadvantage of this scheme of sizing is that the size increment between drill bits is very large for the smaller sizes, 100% for the first step ...
Drill Bit - Characteristics
... Drill bit geometry has several aspects The spiral (or rate of twist) in the drill bit controls the rate of chip removal ... A fast spiral drill bit is used in high feed rate applications under low spindle speeds, where removal of a large volume of swarf is required ... Low spiral drill bits are used in cutting applications where high cutting speeds are traditionally used, and where the material has a tendency to gall on the bit or ...

Famous quotes containing the words bits and/or drill:

    Assemble, first, all casual bits and scraps
    That may shake down into a world perhaps;
    People this world, by chance created so,
    With random persons whom you do not know—
    Robert Graves (1895–1985)

    Swift blazing flag of the regiment,
    Eagle with crest of red and gold,
    These men were born to drill and die.
    Point for them the virtue of slaughter,
    Make plain to them the excellence of killing
    And a field where a thousand corpses lie.
    Stephen Crane (1871–1900)