# 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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### GD&T for Multiple Surfaces as Single Feature

I'm looking to get some collective agreement on a question that I have come across a few times now. When referring to features that are technically independent, what is the general consensus on ...
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### How to display an adiabatic boundary condition in a diagram?

I want to create a diagram. It will consist of a plate with a uniform heat load, a heat sink, and an adiabatic boundary condition. I thought of displaying the sink as a rigid attachment (as in ...
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### 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 ...
687 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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### 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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### 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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### What is the minor diameter of a thread in terms of its nominal diameter and pitch?

I'm trying to find the formula for calculating the tensile stress area of a bolt. According to page 1528 of The Machinery's Handbook (29th Ed.), that formula is given as  A_S=\frac{\pi}{4}\left(\...
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### Servo drive gear placement relative to the body

Is there a universal rule for servo drive gear placement? I'm planning to use this servo for a robotics project, but I need to know exactly where the drive gear is located relative to the body. The ...
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1 vote
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### how to interpret ISO2768-mK angular tolerance

How to apply tolerance for angle based on ISO-2768-mK? Cause I am confused about the statement "Permissible deviations in degrees and minutes for ranges in nominal lengths". Lets say I have ...
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1 vote
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### How would this piece be manufactured

I've started tinkering with drawing parts from the blueprints for a Spitfire Mk V. I am looking at this drawing for a support strut and I am wondering how one might actually manufacture it. In other ...
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1 vote
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### What is the maximum width of this part?

I'm trying to create a PCB footprint for this part, but I'm not familiar enough with dimensioning to fully understand the diagram. Usually dimensions like D and E are specified as minimum and maximum ...
1 vote
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### Hydraulic circuit part question [Blanking Cartridge]

There is a part in this circuit called a "Blanking Cartridge". Its symbol looks identical to a standard capacitor in electrics. I have no idea what this part does. It is connected in ...
1 vote
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### What is the unidentified shape in the drawing

Woot! HTTP://www.DigiPeer.de is back up and running so I am back to practicing part drawing in Inventor LT 2021. I am looking at the following drawing titled "Pin" (according to some ...
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1 vote
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### Replicate loft-based object to value-driven object

I've made the following oddity in Solidworks: All the dimensions are known except for the top part. This is probably because this was done using the Lofted Boss/Base feature. The Loft profile goes (...
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1 vote
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### What software is used to create the graphics for stuctural analysis textbooks?

I want to create some 2D and 3D drawings of simple trusses and frames. and I was wondering, what is the software used to create the graphics seen in structural analysis textbooks (example: R.C ...
1 vote
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### Is there sufficient information to complete the bottom end?

BACKGROUND Fresh of the heels of figuring out my "kinky" issues in this question I thought I was fully prepared to deal with the following drawing titled COILED PIPE 2. The drawing seemed ...
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1 vote
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### Interpreting drawing annotations

The other day I was looking for example drawings to follow that would be used in a real world context as opposed to basic exercise books and I stumbled across a museum archive of the V2 rocket design. ...
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1 vote
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### 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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1 vote
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### 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 ...
1 vote
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### 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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### 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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### Fillet Indicator or Potential Tolerancing

Currently working on some drawing from the Spitfire Mk. V. I am working on this piece from part of the undercarriage legs. I am working with Inventor LT 2021. In the source drawing I can see ...
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### How can I create this lead of helix cut in CAD?

In this blueprint: http://library.centerofthewest.org/digital/collection/WRAC/id/2703/rec/8894 How can I create this Head of helix cut? I'm having trouble in determining the position of the plane and ...
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If on a blueprint it says XXXX R. Max. do I need to add a radius when creating a CAD representation, or is the radius always optional, but if present must not ...
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### How do I perform a lead of helix cut?

In this old blueprint from 1944, it calls for a lead of helix, 1 turn in .2" on red arrow: No other info is provided. This is a top view of the part. Here's ...
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### Find dimension of surface arc in blueprint given instructions

I'm trying to find the dimension for the surface arc as shown here as L: It doesn't provide the dimension directly, instead it says: ...
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### Circularity symbol with datum?

I am trying to interpret a technical drawing that has a datum attached to a circularity GD&T symbol. This page says that Circularity never has a datum reference. But this is a technical drawing ...
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### Missing View From Orthographic Third Angle

so the drawing is missing the right side view, but i'm having a hard time to visualize how it look, especially the 90° part
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### Orthographic projection technical drawing

My professor asked me to make the orthographic projection of this object with the third angle rule, but the object has an oblique/slanted surface. Does it require an auxiliary view too?
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### Missing View and Isometric Projection

i'm having a hard time to project the missing top view and the isometric projection. My professor did not give me any information about what angle it is (like third angle or first angle), so I'm super ...
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### Auxiliary View to Isometric Projection (3D)

I'm having a hard time to visualize this Auxiliary View into Isometric Projection or the 3D version, my friend said that it shape like a hinge, but I stil could not visualize it, can anyone help me?
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### Drafting - Specifying multiple hole quantities

First post in this stack but curious on if there is a 'right' answer (within Australian or ISO standard) for how to quantify numerous holes of same size/properties on a drawing. In the past I've seen (...
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### Tolerances in the manufacture of mechanical parts (plastic)

It is necessary to make an adapter ring for connecting the smartphone to the microscope eyepiece (turn from ABS on a lathe, or 3D printing). Microscope eyepiece diameter is 33mm. What should be the ...
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### Locating an angular surface using GD&T

I'm having doubts about how to dimension an angular surface using proper GD&T techniques. I want to achieve the 6 mm feature of size (FOS) at an angle of 89 deg. to Datum B to within an angularity ...
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### Is there a default circular blueprint cut depth?

I have a drawing that has a circular cut: Nowhere it says how deep should the cut go into the material. Is there a default way to obtain the depth that I'm not aware of?
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### What reference lines can be trusted and what points are being dimensioned

Based on the dimensions for the fold lines of the part above, the part is not square in the corners. It is my understanding that the short sides are actually at an angle other than 90 to the long ...
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### Mechanical Drawing Ventilation Abbreviations - Canada

I'm trying to figure out what the abbreviations are for exhaust fans in mechanical drawings. I've posted an example below, which is shown in the legend as Supply Air (SA), along with its size and ...
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### BA Hole Designation

I a previous question I included a drawing for a strut. In this strut drawing it designates a 2 BA Hole in the bottom of the strut. I have seen this call out for many other parts that are part of ...
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### Is a geometric straight tolerance allowed on threaded bolts?

A custom bolt-like part needs to be particularly straight. Can a geometric straightness tolerance be added on the threaded part of the bolt or can it only be added before threading? The example can be ...
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### Autocad Change Properties for All Object

Does anyone know how to change the Vertex X and Vertex Y value for all of the dots? Because some of the red dots has a different vertex X and Y value which also causes the shape to be slightly ...
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### How to get angle of isometric drawing

My sincerest apology if this question does not fit the platform, I need urgent help, which is why am posting here for the first time. I am very new to Isometric drawing. I am given one sample and ...
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### Find profile view when having frontal and top views

I need to find profile view of an drawing when I have frontal and top views.
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In my on going series of teaching myself to model machine parts in Inventor, I keep stumbling across the following scenario for both external and internal threads. My reference drawing are from the ...
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### Need help with Solidworks

Would I be allowed to ask which Solidworks feature I should use to make the recessed bit (circled in red) of the thing in the diagram below? Thanks.
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### How are 2D views from a 3D CAD Model stored in STEP-File with Boundary Representation generate for engineers to define details? And why?

I am new in this topic and need some help. There are 3D CAD models (stored as STEP Files with the boundary representation) and some engineers need 2D views of these models for further processing. With ...
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### Trying to draw rib tangent to a circle AutoCad 3d modeling

I'm trying to draw a rib tangent to a circle but If some one can link a video or a tutorial on how to do that I'd be really thankful here's the drawing in 2d (the rib is highlighted with the red ...
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### Part drawing information vs Assembly drawing

With my progress through various drawings, I finally came across an assembly drawing with parts I have actually drawn up that caught my eye. The first part drawing as shown below is a simple sheet ...
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### What is the best way to handle the hole pattern in this drawing

Apparently I am on a roll of more questions than not today. In the following drawing, there is a pattern (partial?) of 2.7 mm holes. The word in German pointed at them according to google translates ...
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### Concentric Circles & Section/Breakout Confusion

This is part of my on going saga of drafting question with respect to the V2 drawings I am using for practice while learning inventor. The following drawing is titled "Partition" (...
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### How would you level this arm on a base?

I was wondering how can I level smartly the following equipment's slighlty heavy arm. The arm is fixed on a base with 4 big socket head screws. The same arm needs to be levelled via the 4 jacketscrews ...
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