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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4answers
46 views

How to place a sketch plane at a specific geometric location

My background drafting is structural bridge drawings. I had Inventor LT installed the other day and I have been playing with it to refamiliarize myself with it and get used to the differences between ...
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2answers
36 views

What are the exact dimensions of this screw?

When working on a technical drawing project, I couldn't find the exact dimensions of the following screw In particular, I don't understand the $0.5:1$ to $\emptyset 15$ indication. Is this screw in ...
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3answers
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I need help with dimensions on technical drawing

Here is a 3D model of a housing: How can I specify the position of the marked features ?
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64 views

Projecting side surface from a 3D object made by lofting in autocad into 2D

i have made a 3d object by lofting two circles in autocad: Now I want to project the newly made side surface (without the two original circles) into 2D so I can make it with sheet metal. By ...
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1answer
66 views

Getting a 3d object from connecting two parallel surfaces and then viewing the new side surface

I have two slightly different surfaces (circle with a part chopped off and a similar circle but with half of an ellipse in the chopped off part) and I want to connect them into a 3d object and then ...
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2answers
79 views

How to Construct a Primary Auxiliary View given that an oblique surface with 6 sides

I need to construct the auxiliary views with the given front and right side orthographic views. The view is in third angle projection. I observed that there is an oblique surface so that perhaps I ...
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3answers
77 views

Finding the isometric view of an object from the front and right side view

I need to draw the isometric view and top section view of the object given only the front and right side view. I understand on how other edges of these views correlate with each other. I just do not ...
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2answers
54 views

Does anyone know the name of this mechanical part?

Does anyone know the name of this mechanical part?
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3answers
351 views

Meaning of quarter hole color fill in drawing

In this drawing 4 of the holes have the top left quarter filled in black. What is the meaning of that? It it some special type of hole? The drawing is from a Waveguide and in the specs it says ...
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0answers
30 views

How to align the assembly in Siemens NX?

I rotated the assembly somehow and when I try to make a technical drawing of the assembly this happens: As you can see, the cylinder ( assembly ) makes an angle. How can I fix it ?
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1answer
54 views

Sleeve and cotter joint

What does 0.1D signify in this cotter joint. I meant is it denotes spacing between pin and hole. I am new to machine drawing , kindly let me know. Thanks in advance
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1answer
23 views

How to find a reference line for " Form Tolerances"?

In my project I have to choose a form tolerances ( parallelism ) between the handle ( purple part ) and the part that sits inside it ( the grey part ), where the two parts slide on each other. But I ...
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0answers
45 views

How to find old (especially Soviet/Russian) blueprints

I am interested in old blueprints, especially if related to aerospace (and from the old Soviet Bloc), things like these: Vostok blueprints Soyuz blueprint. Does anybody know if there is any methods to ...
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28 views

Conversion of orthographic projection to isometric projection [duplicate]

I'm new to engineering drawing, and I am having trouble drawing isometric projection from orthographic projections. Can someone give the steps/thought process behind this conversion? I can upload the ...
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1answer
30 views

Shape of the shaft of knurling device

I'm trying to design and simulate a simple knurling device. The shaft ( blue part ) has a flat surface at the other end, where the small grey pin connect the green body to the shaft. I guess you can ...
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0answers
56 views

What if the paper of my drawing changes at the last moment?

I have a full set of about 500 drawings sheets, in Autodesk AutoCAD 2018, with layouts, paper sizes and scales set up for an A0 paper, meant to be printed in A0 at the project beginning. At the very ...
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5answers
120 views

How to choose tolerance size?

I can not really understand how people decide what tolerances to set for a part or assembly. For example: When can I choose 0.2 mm and when 0.002 mm; and if I choose 0.002, why didn't I choose 0.001 ...
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1answer
556 views

Can you help me to interpret technical drawings?

I'm trying to find out the angle/ length of the oblique line, or the solid angle of the conic part. This is what I've tried so far: According to the pythagorus theorem the length of the line is equal ...
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1answer
43 views

Ambiguous technical drawing sizes

I'm having trouble reading several dimensions on this technical drawing. First, I don't know how big is the diameter of the marked cylinder. M24 is a threaded hole in my opinion and that cannot say ...
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2answers
881 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
75 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
58 views

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
37 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
176 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
54 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
69 views

What does this P&ID symbol represent?

The symbol: Here is a part of the diagram:
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2answers
506 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
45 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
60 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
280 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
68 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
130 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
175 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
140 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
50 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
42 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
330 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
116 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
37 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
42 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
95 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
414 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
47 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
40 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
504 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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25 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
135 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
146 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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115 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
3k 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 ...