14
votes
Accepted
How to make factory machine hard disk drive more durable? How much its estimate life span?
Quite likely, the SSD killer is electrical. We can't entirely rule out mechanical vibration, but SSDs are pretty robust mechanically. A simple rubber mounting would increase the resiliency even ...
- 391
11
votes
How to make factory machine hard disk drive more durable? How much its estimate life span?
First off, electrical and magnetic problems are not as bad as problems of vibrations and air contamination. Moisture in air plus dust or chemicals can corrode or short paths quite easily, and in our ...
- 6,125
9
votes
Accepted
Is there an intuitive explanation for the Kinematic Viscosity unit of mm^2/s?
Dynamic viscosity represents the resistance of fluid to shear forces as you said. This is what lay people think of when they think viscosity. High dynamic viscosity = more resistance to flow. E.g. ...
- 2,646
8
votes
How can I cheaply drill a 0.1 mm hole in a small piece of tungsten?
99.5% pure tungsten? A lot depends on what the last 0.5% is.
Ductile tungsten is made by adding a small amount of rhenium, for example. That makes it much more machinable, and improves your chances ...
- 466
7
votes
Accepted
How can I finish a round hole so it has 90 degree corners (flat bottom)?
You are likely referring to a counterbore hole, which may be drilled using a bit of the same name. Alternately, if you can't find a bit of the appropriate dimensions, it may be possible to remove the ...
- 4,041
6
votes
Accepted
How to drill larger bore in pipe?
What you are looking for is called a reamer.
Some 10mm reamers:
http://www.aliexpress.com/item/Free-shipping-cnc-nc-2015-Reamer-10-0-X30X75L-High-speed-reamer-high-degree-of-finish/32244988192.html
...
- 7,904
5
votes
Accepted
How can I cheaply drill a 0.1 mm hole in a small piece of tungsten?
You really need to use a dial indicator to set up a 4 jaw chuck to the sort of accuracy required for this job. This is fiddly compared to a self centering chuck but has the potential to give you ...
- 15.2k
5
votes
How can I cheaply drill a 0.1 mm hole in a small piece of tungsten?
I am afraid that drilling tungsten will be very tough with any available drill bit.
You could also consider laser machining (in my country, there is at least one company offering even small batches ...
- 273
5
votes
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CNC milling of large cutouts
I'm assuming that you are cutting on a base sheet of some sort in my answer, if not, please do. In all my shop applications I have found that double sided taping the product to the base sheet is ...
- 66
5
votes
What is this "clamp" place on a piece of bar stock while turning it in a lathe for?
It's a lathe dog. It grips the part and extends over so it can be pushed by the spindle so the lathe motor can turn it. Like the chuck, it grips the part so the part must follow it in the ...
- 5,237
5
votes
Accepted
Does lead screw's thread have to be trapezoidal?
It's not exactly clear to me what you mean by trapezoidal thread rod. Like you noticed Metric threads are also trapezoidal (just like ACME with slightly difference face angels).
Figure : Common types ...
- 24.3k
4
votes
Accepted
How much larger must the ID of a cylinder be than the OD for a Slip Fit? Material: Delrin (Acetal)
0.01" is probably a decent place to start as a slip fit, though you can certainly go tighter. I might even question if you actually want a slip fit for this application. You say it's for an antenna, ...
- 2,829
4
votes
Accepted
Difference between continuous wave laser and a pulsed laser
Pulsed lasers release their energy in very short pulses which can have incredibly high peak powers. A run-of-the-mill nanosecond laser will have a peak power in the multi-kilowatt range while a ...
- 6,386
4
votes
Are there any materials that can not be drilled or sawed?
You may want to reword your question. What you are looking for is tamper evident materials or tamper evident technology. Searching for those may give you some better results.
Be aware that anyone ...
- 7,904
4
votes
How to define Knurl on drawing?
It looks to me like your guess was pretty good. The required information is only the type of knurl, the extents of the knurl, and the pitch. It is conventional to show the representative pattern, but ...
- 4,531
4
votes
How to define Knurl on drawing?
The (European) standard for knurls is DIN 82. The standard includes a proposed drawing representation as well. Its intention is to describe hand gripping aid knurls. As Ethan48 says, for fitting you ...
4
votes
What are reasons to use cutting speeds different from recommended?
By necessity recommended speeds and feed rates are generalisations and, in practice the optimum for a given job can vary a lot. Recommended speeds are typically intended to be a reasonable compromise ...
- 15.2k
4
votes
Why are entry-level CNC mills cheaper than entry-level manual mini mills?
The two existing comments are correct IMO, it's mostly due to economics. The price to produce comparable CNC and manual machines might be close, but the demand for CNC's is much greater than manual ...
- 2,347
4
votes
Accepted
Shape of the shaft of knurling device
Yes, it would be easier to drill the hole but there are other reasons.
It's makes the shaft the same width as the red bearing also clamped by the green sides.
The shaft will experience torque when ...
- 10.3k
4
votes
Does lead screw's thread have to be trapezoidal?
You can use regular threaded rod as a lead screw. The size and pitch (and grade) of the thread will determine your precision but 0.5 mm seems overkill for furniture positioning. The smaller the screw ...
- 2,347
4
votes
Accepted
How are high accuracy grinding stones and disks made?
Is there such thing as a "high-accuracy" grinding wheel? What does "high-accuracy" even mean in this context? If you mean of a precise dimension, then no. Grinding wheels wear and ...
- 5,237
3
votes
How can I cheaply drill a 0.1 mm hole in a small piece of tungsten?
I would rethink your design.
The cost and difficulty of producing your component with a conventional machine setup is likely outside your range of expectations.
I suggest the following approach to ...
- 1,076
3
votes
How can I cheaply drill a 0.1 mm hole in a small piece of tungsten?
Actually they have a machine call fine hole machine or call Superdrill machine in the market, and use a type of copper tubing with diameter 0.08mm. Or, can use copper tube 0.08mmm as electrode, ...
- 31
3
votes
Accepted
What is the accuracy of direct metal laser sintering (DMLS)?
Accuracy will vary a lot depending on what you are interested in.
At the simplest level you are limited by the layer thickness, which is in the $20-100~\mu m$ range. This places a limit on the ...
- 1,035
3
votes
Accepted
What's the smallest pin-like hole I can machine into a piece of tungsten using a metal lathe and common carbide tools?
Reposting my comment for clarity:
"Before we get into making this: have you confirmed that a wall thickness of ~0.3mm around the hole is going to be thick/strong enough to resist the pressure ...
- 386
3
votes
Accepted
What prevents using a toothed blade with a cutoff saw designed for abrasive discs?
I would certainly hesitate to install a toothed blade on a saw designed for abrasive disks. My biggest concern would be that the dynamic loading is likely to be significantly different and as these ...
- 15.2k
3
votes
Accepted
Accurately measure a bolt hole circle?
The bolt pattern should be a standard; if there are three bolt holes then there should be 120 degrees between each hole. If there are nine bolt holes then there should be (360/9) = 40 degrees between ...
- 3,575
3
votes
How to make factory machine hard disk drive more durable? How much its estimate life span?
Estimated lifespan is given by the manufacturer usually as "MTBF = 2000hrs" but in "normal conditions" - what you describe is not normal.
Why are the SSD drives failing - physical damage or poor ...
- 15.5k
3
votes
How to make factory machine hard disk drive more durable? How much its estimate life span?
Really a comment but too long:
I've dealt with PCs on the factory floor (woodworking), they proved quite resilient.
Our initial setup which was basically trouble free: We mounted the PCs inside a ...
- 171
3
votes
Tapping small hole on titanium
It should be doable by hand; the Quora answer missed what I found to be the most important factor for cutting Ti; use chlorinated cutting fluid like carbon tetra chloride. I once drilled small holes ( ...
- 6,112
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