Table of Contents
What does an assembly drawing include?
Assembly drawing Assembly drawings can be used to represent items that consist of more than one component. Assembly drawings may include instructions, lists of the component parts, reference numbers, references to detail drawings or shop drawings, and specification information.
Do you section nuts and bolts?
Shafts, bolts, nuts, rods, rivets, keys, pins and similar solid parts, the axes of which lie in the cutting-plane, should not be sectioned. Shafts, nuts, bolts, rods, rivets, keys, pins and similar pats, whose axes lie in the cutting plane, are not cross-sectioned.
How do you find the section of a drawing?
When sketching an object or part that requires a sectional view, they are drawn by eye at an angle of approximately 45 degrees, and are spaced about 1/8” apart. Since they are used to set off a section, they must be drawn with care. It is best to use the symbol for the material being shown as a section on a sketch.
What are 3 methods to represent screw threads on a drawing?
There are three methods of representing screw threads on a drawing.Drawing Screw Threads Pitch. Minor diameter. Tap drill diameter.
What is screw thread terminology?
A screw thread, often shortened to thread, is a helical structure used to convert between rotational and linear movement or force. A screw thread is a ridge wrapped around a cylinder or cone in the form of a helix, with the former being called a straight thread and the latter called a tapered thread.
What category does screws fall under?
Mechanical fasteners come in many forms, including screws, nails, nuts, bolts, washers, anchors and rivets. Each of these different types of fasteners is a category unto itself, with many types to choose from.
What are screws used for?
Screws help to hold things together, such as pieces of wood or metal. Compared to ordinary nails, screws provide more strength and holding power. They also form a tighter seal. Plus, unlike nails, they can also be removed fairly easily.
What category are screws?
Wood Screw, Sheet Metal Screw, Hex Bolt, Lag Bolt, etc. Fasteners in some categories are available with different drive types such as Philips or Slotted.Type. Fastener Type Standard or Implied Drive Bolt Hex Head Lag Bolt/Screw Hex Head Carriage Bolt/Screw No Drive Socket Bolt/Screw Allen Drive.
What are the type of fastening in engineering drawing?
There are three main types of threaded fastener; Bolts, Screws and Studs.
What are the types of screw threads?
There are three standard thread series in the Unified screw thread system that are highly important for fasteners: UNC (coarse), UNF (fine), and 8-UN (8 thread).
What type of drawing is used for working drawings?
They may include architectural drawings, structural drawings, civil drawings, mechanical drawings, electrical drawings, and so on. Traditionally, working drawings consist of two-dimensional orthogonal projections of the building or component they are describing, such as plans, sections and elevations.
What is Section in drawing?
A section view is a view used on a drawing to show an area or hidden part of an object by cutting away or removing some of that object. The cut line is called a “cutting plane”, and can be done in several ways.
What are the 7 types of section views?
There are a number of different types of sectional views that can be drawn. A few of the more common ones are: full sections, half sections, broken sections, rotated or revolved sections, removed sections, offset sections, and assembly sections.
Does assembly drawing need more views?
A general assembly drawing should include a part list with quantities, one or more views of the product and its components, and necessary dimensions.
What scale are assembly drawings?
A room plan at 1:50. A component drawing at 1:5. An assembly drawing at 1:2.
What is the difference between a detailed drawing and an assembly drawing?
Detail drawings provide detail descriptions of a part for construction or fabrication, whereas assembly drawings emphasis how the part is to be used. Detail drawings are fully dimensioned. Assembly drawings show the parts together in assembly.
What is UNC and UNF thread?
UNC: Is the symbol for Unified coarse pitch threads. UNF: Is the symbol for Unified fine pitch threads. UNEF: Is the symbol for United extra fine pitch threads. UNS: Is the symbol for Unified special threads.
What is pitch in engineering drawing?
Pitch is the distance between screw threads and is commonly used with inch sized products and specified as threads per inch.
What does UNC stand for in threads?
UNC – Unified National Coarse Thread, comparable with the ISO metric thread. UNF – Unified National Fine Thread.
Does screw length include head?
Does Screw Length Include the Head? The nominal length of a screw is usually, though not always, measured from below the head to the tip of the screw. If no head exists, such as on a grub screw or threaded bar, the screw would be measured from end-to-end.
How do screw measurements work?
A screw for wood is sized by two distinct numbers, first is the gauge of the screw which is the diameter. This means, the larger the number the larger the diameter. Therefore, a number 12 screw is larger than a number 4 screw. The screw size is determined by length and gauge.
How is screw thickness measured?
To measure the diameter of screws and bolts, you measure the distance from the outer thread on one side to the outer thread on the other side. This is called the major diameter and will usually be the proper size of the bolt.
What are the parts of a screw thread?
The three basic parts of a screw are the head, threaded shank and point.
How do you read a screw description?
How to Read Screw Sizes Read the first letter of the size. This the largest diameter: the measurement of the screw on the thread. Read the second number. Read the third number, generally the one following the “x.”.
What is the collective name for fixings?
Yep, “fasteners” is the term.
What is a screw without a head called?
A headless screw is simply called a set screw their are designed to hold an object within another object or hold two objects together.
What are screws without a point called?
The first thing you’ll notice about masonry screws, also called “anchors,” is that they’re not pointed at the tip. A masonry screw does not bore its own hole; instead, you must predrill a hole with before inserting the screw.
