woodworking, boring and drilling lesson, carpentry
TRANSCRIPT
BORiNG / Drilling tools
Boring or Drilling tools
are specially designed to make
hole in wood or metal
The different types of drilling tools adopted to meet special working
conditions such as:1. Punching 4. External
Boring
2. Boring 5. Counter
Sinking
3. Drilling 6. Enlarging
To perform those
operations we need various
kinds of tools
Let’s recogniz
e the tools!
Please help me to find them!
Will you?
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BRAD AWL
Sizes from 1/16” to 3/16” diameter
Smaller sizes called Spring Tools ww vid\bradawl.mp4
• a small tool used for punching or
piercing small holes• it is generally used in starting a nail or
screw into hardwood
• a tool used for boring holes by hand pressure
classified as
a.Twist b. Plain
ww vid\bradawl.mp4
AUGER
diameter ranging from 1/2” to 2 inches
an Auger that is provided with a shank is called “bits”.
Example of Straight Core Bit
• is a coarse pitch for quick boring
recommended for hard or gummy wood,
end-grain boring, mortising doors, etc.
Single Thread Bit
Single Thread Bit & Double Thread Bit
• coarse
• was proven unsurpassed for
accurate working on seasoned lumber not
extremely hard or gummy wood
preferred for cabinet making.
Double Thread Bit
• a bit with double thread can be used practically for all types of work but
bore more slowly than the coarse single
thread bit.
Single Cutter
• with an extension lip and coarse screw is recommended for a general all around boring and rapid clean cutting and
easy boring operation.
• it is used for difficult boring or wet green, and very hard knotty wood and boring or
wood parallel with the grain.
d. Double Cutter
• with extension lip and fine screw big bores and clear the hole easily. It
is recommended for furniture and cabinet
making or wherever the particular smooth hole is
essential.
Single lip Head w/ Single Cutter W/o
Screw or Lip
• is sometimes called barefoot.
• it is preferred for deep boring in wet pitchy wood or when straight boring is required. In the absence of
screw bit. It has little tendency to drift down the
grain wood.
Hollow Auger
• is intended for external boring or
turningww vid\Use of a spoke pointer and hollow auger.mp4
Spoke Pointers
• cuts a conical hole. It is similar with the auger
only that the cutter is lengthwise
Counter Sunk
• is used to enlarge a conical hole at the
surface of the wood.
Counter Sunk
Reamer
• is chiefly a machinist tool used in enlarging
manholes.
Reamer
ww vid\Hand Bead Reamer - Jewelry Tools.mp4
• Likewise, it is also used in carpentry work for
enlarging holes on wood when bored too small for
the screw. Reamer provided w/ a shank
instead of a handle. Thus, brace hand is
indispensable partner of reamer.
Twist Drill
• was designed for drilling small holes.
ww vid\North Brothers, -Yankee- 1545 Hand Drill.mp4ww vid\Wood Hand Drill.mp4
• Twist drills are preferably used in cases where the gimlets or the auger may
cause splitting of the wood grain. This tool has less
tendency of splitting the wood grain because it was not provided with a cutting
lip.
Gimlets
• in using the gimlet, the handle is grasped in the right hand and pressed
into the wood by the palm.ww vid\Chips 'n Tips #5 Gimmie a Gimlet.mp4
ww vid\Boring into End Grain with a T-handle Auger- The Beginning of a Shrink Pot.mp4
• It is driven into the wood by a series of
half turns being released and re-
grasped at each half turn.
Single and Double Twist Auger Bits.
• In boring operations, the screw on the head of the bit draws the tool in
the wood.
• Therefore, making a heavy pressure in drilling is not necessary. The nibs makes an incision in the
wood below the cut advances by the cutters
w/c take the wood shavings into the twist lifting them
out of the hole.
Single Twist Auger Bit
• is primarily intended intended
for boring deep holes.
• the cuttings are thrown into the center of the hold and delivered more easily out as compared w/ the double twist auger w/c
crowds the cutting to the walls of the hole where they become jammed
betweeen the tool and the hole.
Ring Auger Bit
• was designed for heavy work
principally on hardwoods.
• as a worm and twist type boring tool it is
suitable for large deep boring
operations similar in designed as the nut
auger and the boring machine auger.
Straight Core Bit
• is also suitable boring tools for
hard wood.
Expansive Auger Bit
• is also suitable boring tools for
hard wood.
Forstner Auger Bit
• is guided by TS circular rim instead
of its center.ww vid\Step Drilling with Forstner Bits- Quick Tip.mp4
• It can bore any arc of a circle and vould be guided
in any directions regardless of the grain or knots leaving a smooth surface. It is used for
delicate pattern such as core boring, veener,
screen, scalloping, fancy scroll, twist column, etc
Boring Speed
• the pitch of the boring tool screw determines
the speed of the bit.
• It is not practical to make a different pitch for every kind of boring but
certain standards has been adopted for general work. The thread is made of fine,
coarse or very coarse according to speed of
boring permitted by the nature of the wood to be
bored.
• The term coarse and fine as applied to screws are
relative and maybe applied to either single thread or
double thread. The bit having a given number of double threads per inch
will bore just as fast as a bit w/ half that number of single thread of the same
pitch.
• If the cutters have less pitch than the
threads, they will act as a stop gauge not permittingthe bit to
bore as fast as it would such obstruction
• It should be understood that
Double Thread bit is intendedfor soft wood and the Single thread bit is for hard wood
boring.ww vid\Wood Boring Bits.mp4