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14 votes
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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 ...
MSalters's user avatar
  • 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 ...
SF.'s user avatar
  • 6,105
9 votes
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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. ...
Daniel K's user avatar
  • 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 ...
Floris's user avatar
  • 466
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 ...
4LPH4NUM3R1C's user avatar
5 votes
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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 ...
Chris Johns's user avatar
  • 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 ...
dominecf's user avatar
  • 273
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 ...
DKNguyen's user avatar
  • 5,621
5 votes
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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 ...
NMech's user avatar
  • 24.3k
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 ...
Tawhiri Matea's user avatar
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 ...
Ethan48's user avatar
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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 ...
Chris Johns's user avatar
  • 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 ...
jko's user avatar
  • 2,347
4 votes
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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 ...
Transistor's user avatar
  • 10.8k
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 ...
jko's user avatar
  • 2,347
4 votes

Does lead screw's thread have to be trapezoidal?

Well, the question has already been accepted, however. I'll mention something regardless. First of all, it's perfectly fine to use a plain threaded rod for linear motion. You mostly simply need to ...
DrMrstheMonarch's user avatar
4 votes
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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 ...
DKNguyen's user avatar
  • 5,621
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 ...
Donald Gibson's user avatar
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, ...
David chau's user avatar
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 ...
Chuck's user avatar
  • 3,565
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 ...
Solar Mike's user avatar
  • 15.8k
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 ...
Loren Pechtel's user avatar
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 ( ...
blacksmith37's user avatar
  • 6,134
3 votes

Smallest possible elliptical hole

It's unlikely you'll be able to accomplish your goal. Lasers and high pressure water jets are not the tools for the smallest possible features. Electrical Discharge Machining (EDM) is capable of ...
fred_dot_u's user avatar
  • 7,122
3 votes

What is an acceptable tolerance for a non-engineering dimension

There are general tolerances, often defined for different industries. You cannot expect that a surgical instrument is designed with the same general tolerances as a drilling rig. If you have found a ...
useless-machine's user avatar
3 votes
Accepted

Small scale manufacturing

I believe the key here is not the material, but the manufacturing method. I would not recommend a small cnc machine, which seems to be what you're considering. Those are cool and fun, but you will ...
Drew's user avatar
  • 1,971
3 votes
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How are perfectly square blocks made from scratch?

The "three plate" method has been used as the basis for precision manufacturing/inspection. This is a decent summary, it's pretty ingenious and only requires dye and abrasives. This will ...
jko's user avatar
  • 2,347
3 votes

Conventions regarding sliding and press-fit tolerances for shafts and bearings

Shafts and bearings usually use interference or transition fits - they shouldn't slide and for installation you should use force - some kind of press or clamping tool would be best, eventually if such ...
elementiro's user avatar
3 votes

Temporary spray adhesive to hold two plates together for drilling?

Two flat metal plates can be stuck together just by a thin layer of grease. Then work to be drilled needs clamping anyway.
Solar Mike's user avatar
  • 15.8k
3 votes
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Temporary spray adhesive to hold two plates together for drilling?

Yes, it would be a nightmare to separate. That adhesive is designed for high strength, temperature resistant applications. That max temp is the point at which it looses it's rated strength. It may ...
Emily Conn's user avatar

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