10 Questions
What is the advantage of using a combination wrench over a box-end wrench when backing off a tight nut?
It can be unscrewed more quickly.
Describe the function of a ratcheting box-end wrench when removing a nut or bolt.
It can be swung back and forth to remove the nut or bolt.
What are the two parts of a socket wrench?
The socket and the handle.
Explain the difference between socket wrenches with fixed handles and those with detachable handles.
Fixed handles are usually accessories to machines, while detachable handles come in sets.
How are socket wrench handles attached to the socket head?
By a square lug on one end that fits into a square recess in the socket head.
What holds together the two parts of a socket wrench (socket and handle)?
A light spring-loaded poppet.
What types of handles can detachable handle sockets fit?
T, ratchet, screwdriver grip, and speed handle.
How many sides can a socket with a fixed handle have to fit a nut or bolt head?
Four, six, or twelve-sided recess.
What tool shown in Figure 9-7 has a box end on one end and an open-end wrench of the same size on the other?
Combination wrench.
In Figure 9-8, what are the two types of sockets shown along with an extension bar?
Not provided.
Study Notes
Torque Wrenches
- A torque wrench is a precision tool used to apply a specific amount of pressure to a nut or bolt during installation.
- It consists of a torque-indicating handle and an adapter or attachment.
- The wrench measures the amount of turning or twisting force applied to a nut, bolt, or screw.
- Before each use, the torque wrench should be visually inspected for damage.
Types of Torque Wrenches
- Deflecting beam torque wrench (not shown)
- Dial indicating torque wrench
- Micrometer torque wrench (preset to the desired torque and gives a sharp impulse or breakaway "click" when reached)
- Electronic torque wrench
Strap Wrenches
- A strap wrench is a valuable tool for AMTs, used to grip aircraft components without damaging them.
- It uses a plastic-covered fabric strap to grip the part.
Impact Drivers
- An impact driver is used in certain applications to break loose stubborn fasteners.
- It uses cam action to impart a high amount of torque in a sharp impact.
- The drive portion of the impact driver can accept different drive bits and sockets.
Metal Cutting Tools
- Hand snips are used for cutting metal, with different types for different purposes (straight, curved, hawksbill, aviation snips).
- Snips should not be used to cut heavy sheet metal.
Wrenches
- A combination wrench has a box end on one end and an open-end wrench of the same size on the other.
- A ratcheting box-end wrench can be used to remove a nut from a bolt.
- A socket wrench consists of a socket and a handle, with many types of handles, extensions, and attachments available.
- Sockets can have fixed or detachable handles, and come in sets to fit different types of handles.
Learn about the precision tool used to apply specific pressure to nuts or bolts - the torque wrench. Find out how to use and maintain a torque wrench effectively for accurate measurements.
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