7.3.5 Spanners and Sockets Flashcards
What is the term for ‘Spanners’ in the US?
Wrench
Spanners are common tools used in aircraft maintenance.
What is the term for ‘Ratchets’ in the US?
Ratchet handles
Ratchets are associated with tooling in aircraft maintenance.
What is a common material used for spanners?
Chrome-Vanadium Steel
This material is known for strength and longevity.
What are the classifications of spanners?
Open-end Spanner, Ring Spanner, Combination Spanner, Ratchet Handles, Sockets, C Spanner, Strap Wrench
These are categorized tools in aircraft maintenance.
What is an Open-end Spanner?
A spanner with open parallel jaws designed to fit on a hexagonal nut.
Open-end spanners can have jaws parallel to the handle or at an angle.
What is a Crows Foot Spanner?
A type of open-end spanner with an opening for inserting the shaft of a ratchet handle.
Crows foot spanners are useful for securing bleed nipples or pipework.
What is the typical size range for spanners?
From 3/16” to 1-1/16”
Spanners are sized by the AF measurement in 1/16”.
What is an Adjustable Spanner?
An all-purpose tool with one fixed jaw and one movable jaw, designed as an open-end spanner.
Adjustable spanners are generally not recommended for aircraft use.
What is a Ring Spanner?
A tool that surrounds the nut or bolt head, available in hexagonal or bi-hex formats.
Ring spanners are useful in close quarters.
What is a Ratchet Ring Spanner?
A spanner that allows turning a fastener in one direction while remaining fitted.
It saves time and effort by applying the correct amount of torque.
What is a Combination Spanner?
A spanner that incorporates an Open-end spanner at one end and a ring spanner at the other.
It can include standard and ratchet ring types.
What is a Ratchet Handle?
A tool used with sockets to remove and install fasteners, featuring a reversible ratchet mechanism.
Common drive sizes include 1/4”, 3/8”, and 1/2”.
What is a Breaker Bar?
A tool that accepts a socket but lacks a ratchet mechanism, used to ‘break’ torque.
It consists of a long handle with a socket drive fitted.
What are Insulated Tools?
Tools designed to reduce the risk of electrical shock in high-risk environments.
All spanners, ratchets, and sockets can be insulated.
What is a C-spanner?
A tool shaped like a ‘C’ used for removing or installing nuts with corresponding slots.
Variants include fixed, adjustable, C-pin, and pin face spanners.
