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Engineering : Recent Questions and Answers

Find answers to your questions about Engineering or help others by answering their Engineering questions.

Hand thread taps for stainless steel

I'm finding myself doing quite a lot of thread cutting in stainless steel lately, particularly 304 and 316, often these are moderately deep threads ~ 25 mm or so and...

Asked on 01/06/2022

3 answer

Hot neutral in UPS devices in battery mode

I have faced a problem with ITYS E-3KVA UPS device. While operating in the in-line mode the measured neutral-ground voltage is almost equal to zero. However, during...

Asked on 01/06/2022

1 answer

Why does stress act a point instead of on an entire area normal to the stress?

I've often heard stress acts at a point and not on an entire cross-sectional area to which the load is applied normally.Im a little confused here, Let us consider...

Asked on 01/04/2022

2 answer

How do automotive engineers determine the manufacturer rated towing capacity?

My layman’s understanding is that the limiting factors for towing capacity are usually the brakes, engine work capacity, and the transmissions ability to handle the prolonged torque without overheating. Are...

Asked on 01/04/2022

1 answer

Geometric constraints on Planetary Gears

I would like to design a single stage planetary gearbox using standard gears. There appears to be three primary conditions to ensure the geometry of the gears will fit -...

Asked on 01/01/2022

1 answer

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...

Asked on 01/01/2022

2 answer

Gear profiles (involute and root) generated by power skiving

@Involutius contributed an article on the equations that describe the root profile of gears which are cut by a trapezoidal-profiled hobbing tool. From that article, I was able to...

Asked on 12/30/2021

1 answer

Starter direction for methanol engine

I am having a small 2.5cc methanol 2-stroke engine that I am building an electric starter mechanism for. From my research I was under the impression that for a 2-stroke...

Asked on 12/30/2021

1 answer

Abaqus vcct fatigue consistently underpredicts disbond growth rate

I'm modelling a fatigue disbond using abaqus. I've understood the disbond growth rate is equal to: $$dfrac{partial a}{partial N} = c_3 Delta G^{c_4}$$ I've set up...

Asked on 12/30/2021

0 answer

Glass/Tile drill bits

I meant to get a countersink for wood. Then in the hardware store, beside the countersinks, I saw a glass/tile drill bit set, which as a pack, is not so...

Asked on 12/26/2021

1 answer

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