Podcast
Questions and Answers
What is a feature of some ratchet ring spanners?
What is a feature of some ratchet ring spanners?
- They are only used for loosening fasteners
- They have a switch to reverse the ratchet direction (correct)
- They have a fixed jaw design
- They are only used for tightening fasteners
What is a precaution to be taken when using open-ended ratchet spanners?
What is a precaution to be taken when using open-ended ratchet spanners?
- To use them with power tools only
- To use them in areas with restricted access
- To apply the final tightness to fasteners
- Not to use them to apply the final tightness or 'crack' tight fasteners (correct)
What is the primary purpose of special spanners with a limited application?
What is the primary purpose of special spanners with a limited application?
- To be used on any type of thread system
- To be used on a specific component or in special tool kits (correct)
- To be used on only metric fastening devices
- To be used on a variety of fastening devices
What is the purpose of step-up and step-down adaptors?
What is the purpose of step-up and step-down adaptors?
What material are some spanners made from to ensure spark resistance?
What material are some spanners made from to ensure spark resistance?
What shape is the socket aperture usually at one end?
What shape is the socket aperture usually at one end?
Where is the size of a spanner typically marked?
Where is the size of a spanner typically marked?
What are the two main sizing systems used for spanners?
What are the two main sizing systems used for spanners?
What is a common use of socket spanners?
What is a common use of socket spanners?
What does the sizing on a BS spanner relate to?
What does the sizing on a BS spanner relate to?
What is a potential hazard of using a ratchet ring spanner?
What is a potential hazard of using a ratchet ring spanner?
What is indicated by a spanner marked 1/2 BS?
What is indicated by a spanner marked 1/2 BS?
What is a characteristic of the ring/open-ended spanner?
What is a characteristic of the ring/open-ended spanner?
What is the purpose of the gap in each ring of a flare nut spanner?
What is the purpose of the gap in each ring of a flare nut spanner?
What is a common use of box spanners?
What is a common use of box spanners?
What is a characteristic of ratchet ring spanners?
What is a characteristic of ratchet ring spanners?
What is a common advantage of flare nut spanners?
What is a common advantage of flare nut spanners?
What is a requirement for using a box spanner?
What is a requirement for using a box spanner?
What is the main purpose of a crowfoot socket?
What is the main purpose of a crowfoot socket?
What type of drives are composed of twisted steel wire strands?
What type of drives are composed of twisted steel wire strands?
What is the primary advantage of a knuckle or breaker bar?
What is the primary advantage of a knuckle or breaker bar?
What is the main difference between a flex socket and a crowfoot socket?
What is the main difference between a flex socket and a crowfoot socket?
What is a common use for a speed brace?
What is a common use for a speed brace?
What is a characteristic of some extension drives?
What is a characteristic of some extension drives?
Why should adjustable spanners and wrenches not be used on aircraft components?
Why should adjustable spanners and wrenches not be used on aircraft components?
What is the proper procedure for screwing a fastener into a threaded hole or anchor nut?
What is the proper procedure for screwing a fastener into a threaded hole or anchor nut?
Why should pipe unions always be tightened with two spanners?
Why should pipe unions always be tightened with two spanners?
What is a safety precaution to take when using a spanner?
What is a safety precaution to take when using a spanner?
What should be done when there are no torque loading instructions?
What should be done when there are no torque loading instructions?
Why should spanners and hands be free from oil or grease?
Why should spanners and hands be free from oil or grease?
Study Notes
Types of Spanners
- Ring/Open-Ended Spanner: combines bi-hexagonal end and open end, with same size hexagonal head nut or bolt
- Flare Nut Spanner: designed with a gap in each ring, permits introduction to hexagon in restricted access, engagement every 15° of handle movement
- Box Spanner: gives full enclosure of nut or bolt head, used with tommy bar, must fit snugly on nut
- Ratchet Ring Spanner: bi-hexagonal drive socket with ratchet mechanism, rapid run-down/loose of nuts/bolts without removal
Spanner Materials and Sizing
- Spanners made from case-hardened mild steel, hardened and tempered high-carbon steel, or alloy steel
- Copper alloys used for spark-resistant tools
- Two main sizing systems: British Standard Institution (BS) and British Association (BA) Imperial system, American/Unified (Imperial) and metric system
- BS spanner sizing relates to nominal diameter of nut, bolt or stud
Ratchet Spanners and Open-Ended Ratchet Spanners
- Ratchet Ring Spanner: different size drive at each end, may or may not be cranked
- Open-Ended Ratchet Spanner: modified jaw design, grip when turned in one direction, slip in the other, for rapid run-down/loose in restricted areas
Socket Spanners and Drive Accessories
- Socket spanners used with handles, extension pieces, and universal joints
- Socket aperture bi-hexagonal at one end, square or hexagonal at the other
- Common drive sizes: 1/4 in. and 3/8 in. square
- Step-up and step-down adaptors available
Crowfoot Sockets and Handles
- Crowfoot sockets reach nuts in inaccessible locations, available with open, box, and flare-nut ends
- Handles and adapters: extension drives, tee bars, knuckle or breaker bars, ratchet handles, and speed braces
Safety Precautions and Best Practices
- Use spanners of correct type and size, avoid shimming jaws of worn or oversized spanners
- Hold bolt head firm with one spanner while moving nut with another
- Turn fastener when screwing into threaded hole or anchor nut, otherwise turn nut
- Pipe unions must be tightened with two spanners
- Ensure footing is sound, hands and spanners are free from oil or grease
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Description
Learn about the different types of spanners, their materials, and sizes. This quiz covers the properties of spanners, including case-hardened mild steel, high-carbon steel, and copper alloys. Discover the various markings on spanners and their units of measurement.
