Tools Flashcards
How are files categorised? (4)
Length
Section
Grade
Cut
Name the 9 different types of file
Hand
Flat
Half-round
Round
Square
Triangular or Three square
Knife Edge
Warding
Rasp
Name the different types of hammer (3)
Ball pein
Cross pein & straight pein
Nylon faced
How are toolmakers clamps classified?
Overall length
How should measuring equipment be treated?
Kept free from rust and not subjected to rough usage
How to test an engineers square for accuracy?
Draw a line against a true edge, flip the square, draw another line.
Any gap will show twice the error
Or check against a master square
How do you sharpen a spring divider point?
Should close the divider legs and outside of legs be honed on an oilstone
What are the two types of hacksaw blades and how many teeth per inch does each type have?
Fine tooth blade - 24 to 32 teeth per inch
Coarse tooth blade - 18 teeth per inch
What are 3 different types of hacksaw
Standard
Radial (for contours, radii)
Junior (for small diameter)
Why is a chisel used in airframe repair?
To remove the heads from rivets
How is a chisel sharpened?
By grinding on an emery wheel (grindstone)
How are vee blocks classified?
By the maximum diameter of the work they can hold
What are the three heads of a combination set and what do they do?
Square head (engineers square)
Centre head (for finding the centre of the end of a round bar or tube)
Protractor head (angles)
What should you check before using a hammer?
The head is securely fixed to the shaft and the shaft is free from cracks
What should you check before using a file?
The hand is securely fitted
How to sharpen the scribing nib of a vernier height gauge?
Using an oilstone
What does SWG stand for?
Standard wire guage
Whats the difference between measuring and gauging?
Measurements are dimensions measured using an instrument while gauging means comparing the dimension without reference to its size
What information is on a calibration label? (5)
Date of calibration
Date of next calibration
Serial number
Certificate of calibration number
Calibration centre
What are three main types of standard gauges?
Plug gauge - holes an screw threads GO/NO GO (feeler gauge)
Calliper gauge - wire & drill size
Profile gauges - radius & screw pitch
3 types of pneumatic hand drill
Straight drill
Angled drill
Pistol grip drill
Why are tools in aircraft environments air driven? (2)
Avoid possibility of static discharge around fuels and oils
Controllable rotational speed and high torque
6 main attachments for a pneumatic drill
Twist drill
Cone cutters
Rotational files
Hole saws
Abrasive pads
Countersinking tool
What are the two grades of twist drill?
Carbon steel
High speed steel
Whats the purpose of the helical shape on a drill bit?
To allow swarf to be cleared from the hole and allow lubricant to reach the cutting edge
What shank does a drill below 12.5mm have?
A parallel shank
What shank does a drill above 12.5mm have?
Tapered shanks
What lubricant is recommended for drilling mild steel?
Soluble oil
What lubricant is recommended for drilling High-carbon & alloy steels and aluminium alloys?
Kerosene
What lubricant is recommended for drilling cast iron and brass?
Usually no lubricant required
Whats the taper of an imperial reamer?
1 in 48
Whats the taper of a metric reamer?
1 in 50
What are the three types of tap?
Taper tap
Secondary tap
Plug tap
Which tap is used to finish a thread in a blind hole?
Plug tap
Whats the difference between a taper tap and a secondary tap?
A taper is used to start the thread cutting process
The second tap is used afterwards to deepen the thread
To cut an internal screw thread, what size should the hole be?
Equal to the minor diameter of the thread
What size diameter should a rod be to cut an external thread on it?
Equal to the major diameter of the thread
What two reasons is a wire thread insert used?
For repairing a damaged thread
For providing a hard wearing thread in a material which is otherwise not hard wearing
What is used to extract a broken stud?
An ezy out
Whats screw pitch?
The distance between threads
What are the 4 Cs for pre use checks of vernier calliper?
Calibrate
Clean
Close
Check out
What material is used to manufacture a chisel?
High carbon steel
When using a vernier calliper for internal readings what myst you remember to do?
Add the thickness of the jaws to the reading
