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Type: Posts; User: jboggs

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1. ## Thread: Moment force on bearing in swivelcastor

by jboggs
Replies
1
Views
35

### The type of bearing you're using is not intended...

The type of bearing you're using is not intended for this type of application. It is intended for mainly radial loads with lesser thrust loads. In this case the thrust loads are the primary forces....
2. ## Thread: Student in Mechanical Engineering looking for advice on my GPA and future

by jboggs
Replies
5
Views
156

### Yes I do. You don't have the time. "Been there,...

Yes I do. You don't have the time. "Been there, done that".
hang around this forum for some interesting reading. Kelly does a great job of running it.
3. ## Thread: Student in Mechanical Engineering looking for advice on my GPA and future

by jboggs
Replies
5
Views
156

### From 40+ years down the road in front of you:...

From 40+ years down the road in front of you: Grades and internships will open the first doors for you - but that's all. After that, it is only your experience and competence that will open the...

by jboggs
Replies
2
Views
163

### Post a diagram. Explanation is unclear.

Post a diagram. Explanation is unclear.
5. ## Thread: Global Material Callouts

by jboggs
Replies
5
Views
202

### Sounds like your problem is bureaucracy and red...

Sounds like your problem is bureaucracy and red tape, not engineering.
6. ## Thread: Global Material Callouts

by jboggs
Replies
5
Views
202

### What Kelly said - "acceptable alternates".

What Kelly said - "acceptable alternates".

by jboggs
Replies
5
Views
204

### Without gravity the force on the top and bottom...

Without gravity the force on the top and bottom will be a result of the pressure of the water in contact with them. That pressure will be created by the centrifugal force the water experiences. It...

by jboggs
Replies
5
Views
204

### If you're ignoring gravity their both wrong. ...

If you're ignoring gravity their both wrong. Without gravity there would be no liquid at the bottom. The hole in the middle would go all the way from the top to the bottom. A perfect cylinder.
9. ## Thread: Venturi Ejector Air Flow Mechanics

by jboggs
Replies
6
Views
225

### "energy is always conserved but can be changed...

"energy is always conserved but can be changed from one form to another"
Yes but... That transition always includes losses in the form of waste heat. So, its never 100%. That's where the term...
10. ## Thread: Venturi Ejector Air Flow Mechanics

by jboggs
Replies
6
Views
225

### You're getting into an area where details and...

You're getting into an area where details and specific terminology matter. For example you mention "strength", "power", "energy". These terms all have very specific meanings, and are not the same...
11. ## Thread: looking to design an automated backlash checker for gearheads

by jboggs
Replies
2
Views
230

### I would examine the options available for...

I would examine the options available for automatic chucks on lathes. They engage and disengage cylindrical surfaces all day long. Maybe some sort of segmented tapered wedge arrangement like an...
12. ## Thread: Cable Carrier Selection for SMAW on Track

by jboggs
Replies
4
Views
445

### I thought of a reel too, but assumed the voltage...

I thought of a reel too, but assumed the voltage and current would be a killer on that. But I'm not an electrical guy. I would call some reel manufacturers and find out. You would still have to...
13. ## Thread: Cable Carrier Selection for SMAW on Track

by jboggs
Replies
4
Views
445

### You should consult some of the major...

You should consult some of the major cable-carrier manufacturers, like Gortite, Kabelschlepp, or others, just to see what they have that might work. There are many options out there. You might also...
14. ## Thread: Environmental Engineering or Civil Engineering?

by jboggs
Replies
2
Views
550

### Agreed. You will find that the older engineering...

Agreed. You will find that the older engineering disciplines (mechanical, electrical, civil) are also the most diverse as far as job opportunity.

by jboggs
Replies
4
Views
420

### Thick enough and big enough to carry your...

Thick enough and big enough to carry your anticipated loads. But not so big as to be too heavy.

Solved.

Next question?

Seriously, maybe you thought you were asking a simple question. You...
16. ## Thread: Linear then Rotary Action

by jboggs
Replies
4
Views
382

### Can you post a link to the video? Your...

Can you post a link to the video? Your description can be interpreted different ways.

Also, the gold standard on the topic is:
Mechanisms, Linkages, and Mechanical Controls by Nicholas Chironis...
17. ## Thread: Bull gear & Pinion gear Drive Problem

by jboggs
Replies
2
Views
298

### If the system requires more torque now than in...

If the system requires more torque now than in the past, something is changing. What's changing? The number of pinion gears did not change, so how will increasing the number of pinion gears solve...
18. ## Thread: Design for Company & Liability

by jboggs
Replies
3
Views
359

### Also - speaking in broadly generic terms, at...

Also - speaking in broadly generic terms, at least in the US, if somebody wants to sue you or the company for anything at any time, they can. Doesn't mean they will win, but they can sue.

Others...

by jboggs
Replies
2
Views
427

### H:W No homework allowed.

H:W
No homework allowed.
20. ## Thread: Bolt tension on a cantilever beam?

by jboggs
Replies
7
Views
554

### Its a simple lever. Sum of moments about the...

Its a simple lever. Sum of moments about the lower bolt centerline = zero.

by jboggs
Replies
4
Views
861

### I feel your pain my friend. I've been on the...

I feel your pain my friend. I've been on the engineering side for several decades, and I can tell you - just like most professions, we have more than our share of sloppy engineers. Everything I...
22. ## Thread: Using Square Symbol on a square hole pattern

by jboggs
Replies
2
Views
641

### Just to be a contrarian (if that's a word), I use...

Just to be a contrarian (if that's a word), I use the square symbol in a few cases. When the intent is clear (can't be misinterpreted) and the drawing is already very busy, the square symbol can...
23. ## Thread: Economics / Cost of Applying GD&T

by jboggs
Replies
3
Views
473

### Speaking for myself, and based on my 45 years of...

Speaking for myself, and based on my 45 years of experience, GD&T is just a tool, among many, that engineers use to communicate their thoughts to others in a three dimensional form. And just like...
24. ## Thread: Help with designing and making a pneumatic tube transport system?

by jboggs
Replies
1
Views
360

### Since you're wanting to DIY this thing, and...

Since you're wanting to DIY this thing, and you're not sure what technology to use or even where to start, I would suggest you use the engineering approach. Try to identify the 3 or 4 main key...
25. ## Thread: Best Way to Dimension Circular Features

by jboggs
Replies
3
Views
444

### There is no "best way" to dimension a part unless...

There is no "best way" to dimension a part unless you know how it should mate and function with other parts, how it will be made, and how it will be checked. Example, I've had maintenance folks...
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