7.3 Tools Flashcards
What are the 2 lengths of steel rules?
6 inch and 12 inch
What tool is used to measure things high up several feet?
Flexible steel tape
When using a ruler where should your eyes be when reading the measurement?
Above the measurement line on the ruler
What tool tests squareness
Set square
What do radius gauges measure?
Inside and outside radius
What does a protractor measure?
Angles from 0 - 180 degrees
What is a feeler gauge used for?
Measuring fine thickness
What is a ball gauge used for?
Measuring size of holes
What should you use for marking out?
Steel rule
What are dividers used for? And when is accuracy difficult?
Scribing arcs or circles on material. When the legs are wide open
What should scribing be done on?
A scribing block
What is the combination set?
Elaboration of steel rule, 3 attachments
What are ball pein hammers used for?
Shaping metal
What are straight and cross pein hammers used for?
Shaping metal and small nails
What are claw hammer used for?
Used as a lever
What are copper and hide hammers used for?
Shaped metal without leaving marks
What should you do when choosing your hammer?
Access what is needed for the job
What are punches used for and what is needed to use them?
A hammer to hit the punch onto a material for marking out
What are punches made from?
Steel
What are 60 degree and 90 degree centre punches used for?
60 - light work 90 - indentation
What do automatic centre punches not require?
A hammer
What are starting punches used for?
Starting a holes for a bolt/hole
What are parallel pin punches used for? (Clue if needed, used to remove ……..)
Mainly used to remove rivets
What are saws used for?
Cutting material or creating notches
What direction should the blade be pointing on a saw?
Away from you, cutting direction
What is the pitch on a saw blade?
Space from one tooth to the other
What are the three blades you can get for a saw?
Coarse, medium, fine
What does clearance provide when sawing?
Blade catching onto material
Describe use of the hacksaw back and forward using pressure
Forward with pressure, backwards without pressure
What is the use of a file?
Remove material and different rates
What are flat files used for?
Flat or convex surfaces
What are triangle files used for?
Internal angles greater then 60 degrees
What are square files used for?
Enlarging holes
What are round files used for
To file small radius
What are half round files used for?
To file larger radius
What are single cut files used for?
Smooth surfaces and one direction
What are double cut files used for?
Fast material removal, both directions
What are rasp cut files used for?
Rough cut, used in both directions
What are dreadnaught files used for?
Heavy cuts in one direction
What cleans a dirty file?
Metal brush thingy
What is the shank on a drill bit?
The metal rod that goes into the chuck
R
P
What is the cutting edge of a drill bit?
Entire cone cutting edge of drill
What is the land on a drill bit?
Portion between body and flutes
What is a flute on a drill bit?
Helical grooves which can carry fluid
What is the clearance on a drill bit?
Dunno tbf
What are the limits
Minimum and maximum permanent sizes of a component
What are the three types of fit types
Clearance fit
Interference fit
Transition fit
What is a clearance fit
Where there is a space between the two parts (shaft is always smaller than the part it fits into)
What is an interference fit
No space between the parts (shaft is always larger than the part it fits into)
What is a jobbers drill?
Twist drill to cut holes in metal sheet
What is a transition fit
It’s a range of fits which can be either clearance or interference. (Shaft can be larger or smaller than the space)
What is a taper shank drill?
Has a taper brev, idk
What is an extension drill?
Has long shank for reaching limited access areas
What are the two systems of fits
Hole basis system
Shaft basis system
What is the hole basis system
Where the range of fits is obtained by manufacturing the hole to a fixed size and the shaft size is varied
What is the shaft basis system
The shaft is fixed and the hole size is varied
Why is the hole basis system preferred
Because reamers for example come in a range of standard sizes
What does the process of reaming do to a hole
Enlarges a drilled hole
Which way do you rotate a reamer
Only in the direction of the cut
What are reamers made out of
Carbon tool steel or high-speed steel
What do hand reamers normally look like
Cylindrical shaft with a square end
What are chucking grooves
The spaces between the single teeth
What are the two types of reamers
Straight fluted and spiral fluted reamers
How are straight and spiral reamers different
Straight reamers have no precise effect on the direction of the removal of chips whereas spiral fluted reamers lead the direction of the removal of chips in a certain direction
Why must a drill be sharpened?
So it doesn’t create an uneven hole or damage the material
What does a right hand twist with a reamers do
Affects the direction of the removal of chips
What is different on drill bits used for harder material?
It has a larger cut angle
What does a left hand twist reamers do
Moves the chips in the advance direction
What are the advatanges of a machine reamer over a hand reamers
Much higher cutting capacity and can ream dead centre holes
How are hand reamers designed
With a small cutting angle, large major cutting edges and large overall cutting edges
What reamer is the most common,y used and why
A pilot chuck reamer - gives an accurate lead into a drilled hole and a superior finish
When is an expansion hand reamer used
When the hole needs to be cut a few thousands of an inch over nominal size for fitting purposes
When are hand taper reamers used
To produce a tapered hole for the fitting of a taper pin
What are the two types of tapered reamers
Metric and imperial
Metric hand reamer comes in - and refers too?
1-50 sizes and refers to its small diameter
Imperial hand taper reamer comes in - and refers to
Have a taper of 1-48 and refers to its large diameter
What are the characteristics of an adjustable hand reamer
Threaded it’s entire length
Fitted with tapered slots to receive the adjustable blades
What is the reaming speed
The speed of chip removal
What is a disadvantage of using a standard countersinking tool
Difficult to cut the depression to the right depth - making it impractical when you have lots of holes to countersink
What is the most efficient countersink tool and why
Microstop countersink - because it controls the depth it cuts too and keeps perpendicular to the work it is cutting.
Can you take apart a microstop countersink tool
Yes, the cutter head and pilot are removable
What angles do countersinks come in
82, 100, 120
What is a back countersinking tool used for
Used to countersink inaccessible holes
How do you back countersink
Start drill the motor and push back instead of forwards
What is the most common drill for sheet metal?
Pneumatic or air drill
Why are electric drills not used with aircraft?
Can ignite fuel and vapours
What are the most common drill motors?
Pistol grip or straight grip
What are angle drill motors used for?
Areas of tight space
What is a flat offset drill head used for?
Areas that are hard to reach
What is a flexible drill snake used for?
Areas at uneven angles or tight spaces
Should you use countersinking agents
Yes but refer to the AMM for which one.
How many tightening holes does a chuck have?
2, or 3
What is spotfacing
A method used for cutting a flat area or seat for a bolt head on a contorted or uneven surface
How should spotfacing be done
By use of a pillar drill or if not possible a hand held drill can be used.
What pilot should you use for a spotface pilot
1/32 inch smaller than the hole
Why should work be clamped?
Prevent it from slipping, keep it secure, safe
What does UNC mean
Unified national course
What does UNF mean
United national fine
What are screw pitch gauges used for
Used to determine the pitch of a thread quickly and exactly
What does a stock do (hand threading tool)
Used to hold and turn a threading die when producing external threads by hand
What does the die do (hand threading tools)
The dues have three or more flutes to form cutting edges on the internal threads
What is a tap wrench used for (hand tapping)
Used to hold and turn a tap when cutting an internal thread by hand
Why do tap wrenches have adjustable jaws
So they can grip onto each hand tap
Why do hand taps have chamfers on the leading edge
To enable easy starting
In which order do you use the different types of taps
Taper tap then intermediate tap then bottoming tap
What is torque
The amount of rotational force applied when tightening a fastener
What’s is a drill stop and what does it do?
Regulates drill hole depth and width
When is a torque wrench used
A precision tool. Used to adjust torque amountto prevent over or under tightening
What does a drill guide do?
Keeps drill bit at 90 degrees to work
What does a drill guide do?
Keeps drill bit at 90 degrees to work
What are the three basic types of a torque wrench
Deflecting beam
Torsion bar
Toggle
What is a nut plate drill jig? (Clue used on steel block task)
Used for accurate drilling of rivet holes for anchor nuts
What is a drill gauge and it’s use?
A plate with all drill sizes cut into it, can be used to determine drill bit sizes
What must precision tools have
Periodic Calibration testing
How can you test that a torque wretch is set to the specific torque
Test it with a torque analyser
What is a drill agent?
Used when drilling metal, acts as a lubricant
Where would you find specific torque values
In the AMM
What is boelube and it’s use?
Used as a drilling agent, lubricates metals
Does torque loading differ between wet and dry threads
Yes
Do you have a tolerance for thread loading
Yes you have minimum and maximum values
What must you take into consideration when using torque extension bars
That’s the torque measurement is taken from the original centre of the wretch. Therefore you must take that into consideration when using an extension
How are drills sized?
Between 0-60
What’s is correct drill size important for?
Good cutting result
What is drill speed?
Rate at which drill cuts through material
How is a micrometer tested during routine calibaration
A gauge block is inserted between the anvil and spindle and then the spindle is closed gently onto the block. The micrometer is the adjusted (by wrench) to the zero mark on the thimble so it exactly coincides with the sleeve datum line
What is a dial indicator?
High precision measuring instrument measures alignments of shafts or to check smoothness of surfaces
What is a abrasive wheel?
Grinding machine
When measuring with a micrometer what should be used to turn the thimble
Ratchet stop???????????? Not sure idk
Is Josh the most annoying twat ever
Yes
What different types of measurements can you take from a vernier calliper
accurate inner, outside and depth measurements faster than with a micrometer
What is a lubricant?
A friction reducing film added to a surface
What’s the difference between synthetic and mineral oils?
Mineral is from crude oil and synthetic is chemically made
What’s the difference between synthetic and mineral oils?
Mineral is from crude oil and synthetic is chemically made
What is grease?
A thickened lubricant
What is grease applied with?
Hands or lubricant gun.
What is the most common vernier calliper used and what is its range of accuracy
1/20 0.05mm
What is the purpose of lubricant?
Reduce firiction
How do you prevent lubricant contamination?
Keep containers sealed, keep dust away, keep brushes and guns clean, label tubs
What is bond testing?
Testing for safe distribution of currents
What is continuity testing?
Helps find hidden tears and breakages
