7.3 -Tools Flashcards
What are screw drivers made up of ?
Tip/blade
Shank
Handle
What are some characteristics of a screw driver handle ?
Non conductive of heat or electricity
What are screwdriver shanks made of ?
Carbon steel
What % of the screwdriver tip must slot into the fastener, to stop slippage ? (Flat head)
At least 75%
What is the angle of a Phillips screwdriver head ?
How are they numbered ?
30 degrees
Numbered 0 to 5, 5 being the biggest size
Angle of a Reed and Prince or Frearson screwdriver head ?
45 degrees
Difference between Phillips and Reed + Prince (Frearson) screwdrivers ?
Reed + Prince (Frearson) is sharper and has a bigger angle (45 degrees) compared to the 30 degrees of a Phillips head
Reed + Prince - higher torque can be achieved
What is rounding a fastener also known as ?
Cam-out
Benefits of Posidriv screwdrivers ?
Improved version of the Phillips, due to increased contact area.
Reduces cam-out
Benefits of Torx screwdrivers ?
Ability to apply more torque, reduces cam-out
Less operator effort
What are Internal Hex types also known as ?
Allen key fittings
Benefits of a tri-wing fitting ?
Greater torque transfer to the screw
Benefits of Torq-set screws ?
Cross is offset compares to a normal Phillips cross.
Greater torque transfer
Benefits of a MorTorq fastener ?
4 wings that are curved in a cross pattern
This design allows for a shallower recess, yet retain its strength, allowing for less weight
Benefits of a Hi-torque fastener ?
Straight slot arrangement (Like a Flat Head) expect it gets wider on the ends of the slot.
Higher toque can be applied
Suitable where there is a need to repeatedly install and remove the fastener, used on thin skin a/c
How can hammers be classified? (4 ways)
Pein
Face
Weight
Shape
What does the head of the hammer consist of in a hammer ?
Neck, cheek, face and pein
What are the 3 most common hammer types in aviation ?
Ball pein
DIN general purpose
Soft face mallet
What are ball pein hammers made from ?
High grade drop forged steel, fully heat treated
What are 3 less common hammers ?
Dead blow
Copper and rawhide
Sheet metal
How are pliers classified ?
By function and nose type
What are 4 plier hinge types ?
Fixed
Toggle compound
Lap
Slip
What are 4 types of pliers ?
Diagonal (snips)
Combination (general use)
Long nose
Locking
What are multi grips also known as ?
What are the characteristics ?
Swan necks
Several curved grooves that make up a series of interlocking joints.
Long handles for greater force
What are 3 types of vices ?
Metalworking
Hand held
Machine
What can a metalworking vice be ? (2 options)
Fixed / stationary
Rotating
What are spammer often made from ?
Chrome vanadium steel
What is the angle of an open ended spanner jaw usually ?
15 degrees
Benefit of a bi-hex spanner ?
Easier to latch on to nuts and bolts in difficult locations
Are adjustable spanner’s to be used on a/c ?
NO, if so use carefully - can cause damage
What 4 versions can C spanners be broken into ?
Fixed
Adjustable
C pin
Pin face
Where are C Spanners used ?
On landing gear oleo struts or hydraulic filter housings
What are the 2 types of torque wrench ?
Type 1 - Torque wrenches that indicate the torque via a mechanical scale, and is up to the operator to stop at the desired torque
Type 2 - Torque wrenches that are pre set before use, and beeps or clicks when torque is reached.
What are the different Classes of Type 1 torque wrenches ?
Class A - Wrench with flexing bar
susceptible to damage - rare to see
Class B - Rigid body and indicator (dial)
Class C - Rigid body and Electronic reading
Class D - Screwdriver with indicator (dial)
Class E - Screwdriver with Electronic reading
What are the different Classes of Type 2 torque wrenches ?
Class A - Adjustable with indicator
Class B - Fixed torque wrench
Class C - Adjustable with NO indicator
Class D - Adjustable Screwdriver with indicator
Class E - Fixed Screwdriver
Class F - Adjustable Screwdriver NO indicator
Class G - Adjustable with flexing bar indicator
What is torque ?
Rotational or twisting force, intended to turn a fastener
What must be done when storing Torque wrenches ?
Keep in casing
Keep clean
Store at lowest torque setting - relives pressure from spring
What must engineering squares meet in terms of European standard ?
BS 939 + DIN 875
What are callipers used for ?
Measuring diameter and distances
2 types of callipers ?
Inside (inside diameters)
Outside (outside diameters)
What are the 2 angles of a prick punch ?
When is a prick punch used ?
30 or 60
Used when marking a piece of metal, to show where holes must be drilled, NOT to help the drill
What are the 2 angles of a centre punch ?
60 for light and 90 for general work
Prevents wander during drilling a hole
What is an automatic centre punch ?
60 to 90 degrees
Causes a dent, to help with drilling.
No hammer needed, just the palm of your hand
When is a starting punch used ?
To start when driving out a bolt or pin
What type of punch is used to remove a rivet ?
Pin punch
What type of punches are used, when damage may occur when using normal steel punches ?
Copper and brass punches
What are yellow, green and red aviation snips ?
Yellow - cuts straight
Green - cuts right
Red - cuts left
3 types of saws ?
Full size hacksaw
Junior hacksaw
Mini hacksaw
What is the size range of a full size hacksaw ?
6 to 16 inches
12 being most common
Ranges of blade pitches and usage (Full Size Hacksaw)
14 tpi (coarse) - cutting steel
18 tpi (coarse) - aluminium
24 tpi (medium) - thick tubing, brass, copper
32 tpi (fine) - thin tubing, sheet metal
Direction of cut on Full Size Hacksaw ?
Forward stroke
Direction of cutting on a junior hack saw ?
Towards the operator
What are files made of ?
High grade carbon steel
Usual angle of teeth of single cut files ?
65 - 85
Usual angle of teeth of a double cut file ?
First set: 40 - 50
Crossing set: 70 - 80
4 common grades of file cut
Bastard
Seconds
Smooth
Rasp
3 methods of filing ?
Straight filing
Cross filing
Draw filing
4 types of pneumatic drill ?
Pistol grip drill
Straight drill
Right-angle drill
45 degree angle drill
