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Questions and Answers
What term is used to express the distance AB?
In the context of screw threads, what does the term 'Pitch diameter' refer to?
Which type of joint is Double riveted (Zig-Zag) associated with?
What is the term for the dimension between two consecutive threads measured parallel to the axis?
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What does the distance of a screw advance in one complete turn refer to?
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Which type of head thread is used in carpentry vices and ratchets?
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How is the distance between corresponding points on consecutive threads measured?
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'Across corner (A/C) of nut' refers to which dimension of a nut?
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Study Notes
Fasteners and Threads
- Fillister Set Screw dimensions: 1.5 D + 3 mm
- Various types of screws are categorized by their thread; left and right hand threads are common.
- Bureau of Indian Standards (BIS) is key in standardizing bolts and screws.
- British Association screw is commonly abbreviated as B.A.
Types of Screw Threads
- Terms to know: Flank, Crest, Root, Pitch, Lead, Single Start, Double Start, Triple Start.
- Different thread types include Knuckle, Square, Buttress, and Acme threads.
- Lead relates to the distance a screw travels with one full rotation; indicated as single, double, or triple start.
Nut Types and Features
- Domed Cap Nut, Castle Nut, and Simmond's Lock Nut are popular types.
- Features such as thickness, width, and height of nuts should be considered.
- Special types of nuts may include Capstan Nut and Grooved Nut.
Bolt Types and Uses
- Castle Nut is recognized for its locking capabilities with a fiber ring.
- Foundation bolts may vary: Lewis, Cotter, through, and stud and nut foundation bolts.
- Screws can be categorized as cylindrical, T-head, hook, or eye bolts based on design and function.
Key Types and Applications
- Different keys include: Saddle Key, Woodruff Key, Dovetail Key, Peg Key, and Sunk Key.
- Segmental keys are often used to secure rotating components, engaged between hub and shaft.
- Key engagement is crucial for mechanical reliability; key types are selected based on the application.
Rivet Types and Uses
- Rivets come in various head types: Countersunk, Pan, Round, Ellipsoid, and Conical.
- Caulking operations are performed to prevent leakage from rivet holes in joints.
- Joint types include double riveted butt joints and lap joints, impacting strength and application in structures.
General Factors to Consider
- Various measurements in terms of diameter (D) need to be noted for proper fitting and function.
- Understanding threading and fastening mechanisms is essential in mechanical design and assembly.
- Selection of fasteners should be based on load requirements, environmental factors, and connection types.
Studying That Suits You
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Description
Test your knowledge on different types of foundation bolts by choosing the correct names for each type presented. Identify bolts like Eye foundation bolt, Cotter foundation bolt, and others.
