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8

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 of drilling a hole. Even then - a 0.1 mm hole is extremely small, and I would not try to make a hole like that mechanically. You can try electrochemical ...


5

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 better accuracy for equivalent quality parts. Similarly you need to make sure that the part you are drilling is faced off as square as possible in the chuck and ...


5

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 with a very affordable price, comparable to the price of a single 0.1 mm drill bit - which you would almost certainly trash anyway). Or, you could build your ...


5

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 circumferential direction but unlike the chuck it does not impose any radial positioning to the part. Why is this useful? Why not just use the chuck? Well, a chuck grips ...


3

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 create a micro orifice. Instead of a conventional printer nozzle, consider using a thin piece of sheet material, perhaps 1mm thick, which has been drilled by a ...


3

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, machining using electrode discharge machine (EDM).


2

There is an instability (wobbliness) caused by uneven chuck jaws in my G0768 lathe. I read online about it and was able to correct it by incrementally inserting standard paper pieces until the chuck was aligned enough. (OTOH, the spindle is perfectly aligned it seems, by eye - can't see any movement in it). So doing that I was able to drill a 0.25mm hole ...


2

In industrial applications probably the closest approximation is in dressing bonded abrasive wheels. These use abrasive particles including aluminum oxide but a different bonding medium which makes them a bit tougher than standard fire bricks. With this is mind a diamond tipped dressing tool would probably be a good thing to try. I lathe turning stone ...


2

A groove will have a very slight internal radius in its corner, but if this is undesirable, then a relief grooving tool is used to remove this material. The relief grooving tool comes in at 45 Deg to cut as shown:


2

The number isn't as important as total surface area of the holes - it doesn't need to be greater than the can opening for the remaining pressure resistance to be entirely negligible. Decision on the number should be a trade-off between uniform distribution of the load and possibility of having the holes sealed by dirt or whatever contaminants could be ...


2

In many cases it is possible to make measurements to a much greater degree of precision than the parts required by the instrument doing the measurement. Just think of things like plumb lines, spirit levels, dividers etc and once you can get straight lines and circular arcs you can do pretty accurate geometric constructions. Also techniques like lapping and ...


1

Generally you want more than 24 teeth in a gear to avoid having an undercut tooth profile, if you're using off the shelf 20 degree gears. Spur gears you also want to have at most a 5:1 ratio between teeth. Your smaller gear (pinion) should be of a harder material than it's mating gear. If possible have the greatest common factor between the number of teeth ...


1

Probably the best option should be select the least used gear (this is what I would have done in this case). I know the multiple gear system (i've operated a lathe in the past) and there's some gears that I've never used (and neither my predecessor). So if you're using the geartrain the best option is to use some gear less usable (and with less wear) for ...


1

Wire EDM and a lathe aren't really directly comparable. Wire EDM is typically used for profile cutting of very hard materials such as hardened tool steel with good dimensional accuracy and may also be useful for producing very small holes or slots. As a result it tends to be quite a specialist process and compared to conventional machining processes on ...


1

Call local machine shops, and ask them, if they have a sonic mill. It uses special bits with coolant and ocelats to make the cuts. It can cut accurately through 1/2 inch in about 45 minutes. It shouldn't be too expensive, basically it vibrates the the material.


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