Questions tagged [technical-drawing]

Technical drawing, drafting or drawing, is the act and discipline of composing drawings that visually communicate how something functions or is constructed.

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6
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2answers
809 views

How to indicate bolt direction on a drawing?

Consider the following steelwork drawing: The location of the 6 no. M12 bolts are indicated with a circle and cross. However, it is not clear whether the shank of the bolts should point into or out ...
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1answer
30 views

Is there anything in BS 8888 regarding the scale of a section view?

If a section view isn't sufficient enough to show all details required, can it be at a larger scale than its parent view? Is there anything in BS 8888 regarding recommended scales in section views? ...
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1answer
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Notation of a technical drawing

can someone explain me what 1/8" or 1/16" means in the image below?
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1answer
33 views

Specifying GD&T feature when not expecting the fabricator to measure it

For context: I work designing one-off science exhibits. Generally we design around pretty sloppy tolerances when we can, so things can be cheaper to make, with less precise tools, and at more ...
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3answers
82 views

How to draw an arc through 2 known points and tangent to a line

I am using AutoCAD and I was trying to figure out how to draw a circular arc through 2 known point and tangent to a line. When I look at the circle tools I see the following options: When I look at ...
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1answer
37 views

Connector drawing - please help find C abbreviation/symbol meaning

Please help me to identify what C5 stands for in this picture. Full drawing is available here.
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1answer
46 views

What does this P&ID symbol represent?

The symbol: Here is a part of the diagram:
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2answers
102 views

Converting multiview drawing to isometric drawing

Please help me answer this. There is more to this but I just need to know the trick so I can answer the rest please.
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1answer
44 views

Steel beam size

I'm a customer not an engineer! I had 2 sets of drawings for a project to put in bi fold doors. The original drawing had a beam of 230mm and then the engineer sent a revision with a beam 260mm. The ...
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1answer
28 views

How do I interpret a fillet indication on a technical drawing

I'm reproducing in Fusion 360 an object based on a technical drawing, but I have trouble understanding what this means: When I read the Wikipedia article on Engineering drawing, abbreviations and ...
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2answers
57 views

Meaning of a symbol for a hole specification in a drawing

A very simple question, so sorry for this, but I have searched many online docs and cannot find a simple answer. I have a hole specification of 3.4 + 0.13 (picture attached). What does the +0.13 mean? ...
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1answer
43 views

Drafting techniques for various views [closed]

I was looking at this previous question and I got bored and started drawing it up just for something to do. The image in the question shows a nice front view and an elevation/section as shown below. ...
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1answer
89 views

Convert .dxf file to .svg

I'm an software dev and my job is to convert a .dxf file into a .svg file My code actually works, but there are some issues with the dimensions or something similar. Unfortunately, i have no ...
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2answers
83 views

Coplanarity Profile Callout Confusion

From Krulikowski (1997), the callout for several coplanar surfaces using the Profile symbol is done by using two surfaces to establish datum plane A-B and then tolerancing the remaining coplanar ...
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1answer
66 views

Do drawing dimensions have to start from datum?

When specifying the depth of a cut, should the dimension start from the datum surface or from the surface where the cut will be made? In the example below, a cut of 5mm is made from the surface ...
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0answers
28 views

Dimensioning holes through a hollow shaft

I have three types of holes in a hollow shaft that are perpendicular to the shaft. The first type of hole go only through to the centerline. The second type go all the way through (i.e. out the other ...
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1answer
36 views

Autodesk Inventor Make Holes on Different Edges Based on One Line

I need to invent a construction based on standard square tubes with holes placed in certain distance from each other and from ends of the tubes: I also need to imagine the tube with holes as a ...
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0answers
209 views

In freecad, how do you copy a sketch geometry from one plane to another?

I'm using FreeCAD, and I would like to copy all the geometry in a 2D sketch to another plane. So you have a 2D drawing on XY, and you want the same geometry to be copied to XZ. I can't seem to find an ...
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3answers
98 views

What is an acceptable tolerance for a non-engineering dimension

I have part that I'm dimensioning and setting tolerances on. Some of the dimensions/features have engineering requirements (e.g. press fit) and I have the tolerances set correctly (e.g. H7). But I ...
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1answer
35 views

Please check the front,top and left hand side view of my figure

Below is the link what I have tried Please check if it is correct or not?
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1answer
40 views

buying a mounted bearing determining radial vs axial load it can bear

Can anyone tell if these bearings load ratings are for a radial load or an axial load ? Bearing designed for an axial load is (sometimes?) called a "thrust bearing". Based on its mounting, I guess ...
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1answer
77 views

What does “h2” mean on technical drawing?

I have a technical drawing, but I can't understand the "h2". The "h2" points to a hole, and I don't understand it. Can you please give me an answer? Thanks!
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1answer
235 views

How to model Motor Windings in Solidworks?

I want to model a DC motor in order to eventually do some simulations (temperature/cooling related) and I'm wondering what is the best way to model the motor windings? I've seen a few video's on how ...
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0answers
35 views

Differentiating between Two Orthographic Projections

I came across the infamous control handle assembly in two different books, referencing the views differently. One of the had it like the following photo The other book labelled the side view in this ...
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1answer
35 views

Autocad start drawing away from the Z=0 (non-coplanar)

I'm having an issue when I draw some elements. They are been drawn away from the Z=0, is causing to be non-coplanar with other elements. So, I cannot make fillets or can find crossing points. I don't ...
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1answer
208 views

Why is the left-side view called like that?

The top view looks at the top of the objet from the top of the object, the front view looks at the front of the objet from the front of the object. All seems logical. So why does the left-side view ...
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24 views

How do split drawings from this without losing their dimension Autocad

I have a dxf file converted to dwg (unit: millimeters). There are 6 different drawings in the same file, How do I split those to different sheet. I wanted to take their consumption, as they are going ...
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1answer
83 views

Is is possible to form a 3D object from the front, side, top views with a triangle, a square and a circle respectively?

A friend of mine asked me this question, but I don't know if it is possible or not. If it is possible, please show me how to construct it. If it is not possible, please prove it. Thanks.
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4answers
142 views

Strange CAD excercises

a long time back at school, I had a difficult excercise which was named X, Y and Z bodies. They were drawings where both the front view and the top view were fully given. We had to find the view from ...
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70 views

Projection of a given view to produce another views

First as a beginner in Technical drawing, I'm required to project two other views from the given views. In the first image the original object was not given and I'm required to produce the third view. ...
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2answers
2k views

What does “do not scale drawing” in a drawing sheet mean?

I opened a new sheet in Solidworks drawing, in the title block, there was a field written "Do not scale drawing". What does that mean? There is a scale already being chosen over there. It was just a ...
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1answer
110 views

P&ID Symbol Identification Question

Does anyone know what these three symbols are? I am working to identify them but they do not seem to appear in the site: https://www.edrawsoft.com/pid-legend.php Does anyone know a better reference ...
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1answer
207 views

Engineering Drawing-Projection of intersection curve of two standing cones

I have this projection of two intersecting cones, and I am asked to draw the intersection curve of the two cones on the projection. What is the right way to do it?
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1answer
99 views

Drawing in orthograhphic

I need to draw this in orthograhpic views. I'm a bit confused about the weight of lines I should use to draw. Like ,for the pat (I pointed the arrow at) you can see it's sticking out a bit, would I ...
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2answers
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Technical Drawing: Labelling a component that's not part of my design but integral to my system

I am creating a technical drawing of a system I created. Let's call my system, system X. System X is a mounting mechanism for already invented system Y. System Y is customizable, however, system X is ...
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1answer
52 views

Help interpreting dimensions from this drawing

Why there are different dimensions for the same measurements on this drawing? For example 0.127mils and 0.097 mils pin to pin. Or highlighted 405 and 385 mils. I can't find anything on the datasheet ...
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1answer
79 views

How to calculate the dimensions of an ellipse in a multi-view projection

The following image is an example that will help to demonstrate what i am saying and this below is a blender image version of an object with a slant surface at the top. to draw the multi view ...
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1answer
67 views

What does P0.35 stand for in a Tech drawing for a Bolt

Got a Tech Drawing today with measurements and all that. I understand everything except for one part where they've specified a bolt with M4 P=0.35. The M part I get but what does the P specify?
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337 views

What standards apply when specifying coating/painting in a mechanical part drawing?

I have produced a part drawing which calls up a machined mark on a flat surface, and the supplier has manufactured the part with this surface painted. I haven't added a note to the drawing that says ...
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2answers
50 views

How to communicate to keep original dimensions of a part in a technical drawing?

Example: let's say that I have a rectangular part that I would like machined. I'd like to cut it to change the length, but the width and thickness are fine as is. The width and thickness are not nice ...
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1answer
201 views

What do the short parallel lines mean in a symmetrical value?

I was wondering if the short parallel lines at the ends mean anything?
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1answer
139 views

Is the diameter before knurling assumed to be the same as diameter after knurling?

If the diameter before knurling is 80. Is the knurled diameter also 80?
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1answer
103 views

How are NPT hole features defined?

I'll be the first to admit that I have always been somewhat confused by best-practice dimensioning standards surrounding pipe threads. While there is a decent amount of literature available online, (...
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2answers
65 views

Technical Drawing Content

When producing a set of engineering drawings for products we tend to specify the materials used for the part in the notes. For example if it's a moulded part we'd specify PA6 GF20 and then the ...
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2answers
85 views

Find correct dimensions from mechanical drawing

I'm designing an electrical component into a CAD from the manufacturer drawing. The version I'm interested to is the code 106166-1 (6 positions, last entry in the table). I'm not sure to understand ...
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1answer
119 views

Can you help interpret hand-drawn technical drawing?

I can't seem to figure out the proper left view for the following image, and the full and half sectional cutout for the left and front projection.
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Suggestions needed: Automatically recognising key elements of object in 2D image for technical drawing reconstruction [closed]

Disclaimer: I am aware that this is a vague question, I am merely looking for suggestions on where to start. If you find that this question is better asked elsewhere, suggestions are more than ...
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1answer
3k views

Understanding hole specifications

I am trying to interpret the hole specifications in the attached diagram. What does each component mean? I understand what 'Thru All' means, does 4x mean 4 holes? What is the diameter of the hole? is ...
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0answers
84 views

What does C20019 IN PAIRS AT 900 MAX CTS WITH 2 ROWS OF BRIDGING AT 1/3 POINTS mean in a technical drawing?

Specifically, does in pairs mean that there are 2 C20019 members per indicated line on a technical drawing?
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1answer
1k views

2PL / 3PL annotation on arc in technical drawing

I found a technical drawing of a popular guitar shape online and I'm having trouble to understand a certain annotation on some arcs in the drawing. It basically says stuff like "0.43R 2PL" or "3PL" (...