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Copy of P.P.T Presentation: Drills

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Rishab Saini

on 24 November 2013

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Transcript of Copy of P.P.T Presentation: Drills

Thank you for your attention!
Drills are awesome
What the hell is a drill anyway?
-Drill press
-First electric drill in 1889, invented by Arthur Arnot
and Blanch Brain.
Portable version in 1895
1917 Black and decker made
Everything you need to know
History of the drill
Types of drills
Easily Transported
Less power
Run time restricted by battery life
Recharging my take hours
Higher voltage means more power but more weight
no cord safer
Newer technology has improved cordless drills; most are now strong enough for many tasks previously out of their league. Also with new lithium Ion batterys charging time and weight has improved
A drill is a hand tool, power tool, or machine with a rotating cutting bit, used for making holes.
-Thousands of years old!
-Egyptians used bow drills
pistol grip version.
A wide variety of drill types are available for all your boring needs. They can be divided into 5 catergories, hand powered tools, corded electrical, cordless electric, and gas.

Let's have a look at our options, starting with hand operated drills.
Hand operated
Bow drill
Brace, or bit brace
-Push drill
-Hand drill
-Breast drill
Now for Corded types....
Before the industrialization of electric power, most drills were operated by hand, and these tools can still be useful today, in remote areas, developing nations, and anyplace you find your self with out electricity.
Types of power drills
-Hammer drill
Impact driver
-Most Common
-Huge selection.
-Wide size range
-For tight spaces
-For drilling concrete, masonry

-Uses pulses, BPM's.
-Usually cordless or air
-Generates lots of torque
(see diagram)
Traditionally, electrically powered drills used
cords connected to 120 volt circuts.
these tools are being replaced by cordless versions.
However they generally still do posses certain advantages to battery operated cordless devices.
such as....
-greater torque.
-reliable power.
-economical alternative to cordless.
Power drills of either type may be purchased to perform the same task.
Let's review some of our options.
parts of a drill
-exterior parts
-interior parts
They are sized according
to the bits that they can
use and the amperage or
voltage of their motor
Drill bits
There are a wide variety of drill bits
available for every kind of boring and drilling
operation. (Boring=making holes in wood.
Drilling=making holes in metal)
Some of these may be sharpened without
highly specialized equipment and skills.
Others are not user maintainable. Please
refer to owners manual and google to learn more.

Let's get an eyeful of some drill bits.
straight shank twist bit
-most common

-drills steel

-bores wood

-sizes: fractions, mms, letters.
masonry drill bit
-for boring concrete, stone

-use in hammerdrill
spur point bits. aka wood
or dowel bits
-two raised spurs
-quick cutting
-wood boring
Bullet pilot point bits
-these are similar
to spur point bits
but can drill thru metal,
plastics, and other
counter sink bits.
-for screw pilot holes.
Tile bit
-this bit is similar to the masonry bit
-no hammer action
spade bit
-only for power equipment
-efficient for removing large amounts of
Forstener bit
-incomplete holes
-used for much the same purpose as
spade bit
auger bit
-double or single twist
-hand tool bit
drill press
-good for drilling accurate
The cordless drill
-developing tech


-sized by voltage
Gasoline powered
-for heavier
-fume hazard
Do not do
1. Own and wear safety glasses.
2. Do not wear loose fitting clothing.
3. Wear clothing that will cover and protect your body,
but not get caught up in the moving parts of the drill.
4. Use a dust mask if needed.
5. Hearing protection never hurt anyone.
6. Loose fitting gloves might get caught by moving devices.
• Do not use a bent drill bit.
• Do not exceed the manufacturer's recommended
maximum drilling capacities.
• Do not use a hole saw cutter without the pilot drill.
• Do not use high speed steel (HSS) bits without
cooling or using lubrication.
• Do not attempt to free a jammed bit by starting and
stopping the drill. Unplug the drill and then remove the bit from the workpiece.
• Do not reach under or around stock being drilled.
Do not use in wet location

1. Maintain your drill and bits
2. Clamp and secure whatever your working on as a general rule.
3. Mark the center of the hole or use a center punch to mark it. Then place the drill in the center of the hole.
4. Predrill holes for woodscrews.
5. Start slowly and slowly increase speed.
6. Vary the pressure and don’t let the drill bind.
7. Don’t force the drill, let the machine do the work.
8. Slower speeds for thicker wood and high speed for metals.
9. Withdraw the bit often while drilling to remove chips.
10. Brush these away, blow on them and they could end up in your eyes.
11. Use a side handle and hold the drill firmly with both hands.
12. Take your time
Proper Technique
Who Uses the drill anyway?
Carpenters, electricians plumbers, framers,
mechanics. EVERYONE!
Worlds largest drill.
Is 9.5-meter (31-foot) wide drilling machine
Used to drill a tunnel under the swiss Alps
Its real. and it works!
Worlds smallest drill
Full transcript