thread maker tool

[VK5RC]

Most commonly available taps are just the 3 types of taper,  bottoming etc,  there are large numbers of other variants (partial,  full,  overfull).  There are some good machining texts that cover these issues over MANY chapters.
For small threads (less than 8mmm) it usually makes little difference. You can spend a huge amount of time looking at all the options,
 ....... if the screw fits.......... :-)

[jetwolfk2]

i use these often and its simple drill the pilot hole and then a bigger bit closest to the bolt size then use the threader, this way the threader does not get worn as much

[kripton2035]

i use these often and its simple drill the pilot hole and then a bigger bit closest to the bolt size then use the threader, this way the threader does not get worn as much

yes but then the thread will not be as deep as it could be ?

[mzzj]

You guys are buying single tap sizes for doing a couple of holes, in aluminium, for hobby purposes?

Sheesh.  Walk down to your local hardware store, pick up a cheap tap and die set.

Pretty often those cheap tap and die sets are so nasty quality that you will soon regret trying to tap even couple of M3 holes in aluminium.

Soft gummy sort of aluminium requires sharp taps with good surface finish if you dont want broken taps and ugly threads.

[kripton2035]

I bought this one on amazon.fr (build in germany)
very good quality and 3 tap sets for less than 25 euros

[Kjelt]

I bought this one on amazon.fr (build in germany)

Wow the french buying german stuff, europe becomes a success and the world is changing 

[cs.dk]

i use these often and its simple drill the pilot hole and then a bigger bit closest to the bolt size then use the threader, this way the threader does not get worn as much

yes but then the thread will not be as deep as it could be ?

Thats usually not a problem. A day at work someone slept and drilled 7,5 mm (instead of 6,8 mm) hole to a M8 thread. Just as a test we tried to mount a M8 bolt (8.8), it was almost impossible to turn over. Try make the test your self, you will be surprised over the strength.

[rob77]

i use these often and its simple drill the pilot hole and then a bigger bit closest to the bolt size then use the threader, this way the threader does not get worn as much

yes but then the thread will not be as deep as it could be ?

Thats usually not a problem. A day at work someone slept and drilled 7,5 mm (instead of 6,8 mm) hole to a M8 thread. Just as a test we tried to mount a M8 bolt (8., it was almost impossible to turn over. Try make the test your self, you will be surprised over the strength.

the strength will something like half or less compared to the specs

[Kjelt]

Maybe in 70 of the 100 cases it is no problem. When you mount unmount the bolt 50 times in that thread and put a lot of pressure on it , it might become a problem in the long run. Let's say it like this, I would not want to ride a rollercoaster ride where all the taps were not in spec. 

[akis]

I bought this one on amazon.fr (build in germany)

Wow the french buying german stuff, europe becomes a success and the world is changing 

Germany must be the only country in Europe where you walk into the supermarket and everything you see on the shelves is ... made in Germany. Italy must be a clilose second, and did not try Austria. But try the same at an English supermarket, everything is made in China. Everything in our kitchen, except our very, very old (and very good) pots and pans (made in Belgium), is made in China, glasses, plates, cutlery (except some specially bought Sabatier knives). I'd say 85-95% of all the kitchen items, and items all around the house, it's all made in China.


So there are a few things of note here:

1) England does not make anything (tangible) - it is a miracle that the world pays England for anything - the English literally must be selling hot air to the rest of the world and the world is falling for it
2) Germany makes everything - they are almost self sufficient
3) Italy also makes their own stuff (but it was about 10 years ago when I looked)
4) England does not buy from Europe - except some dubious quality food produce, like olive oil, labelled as "made in EU" which in my books means "chinese engine oil, made to look like olive oil, arrived in some weird EU country under different designation and label, repackaged in some weird EU warehouse and lost its "China" stamp, and now sells as genuine EU olive oil. Yes, because as we all know the whole of f*cking Europe is packed with olive trees. Yeah, right....

[cs.dk]

the strength will something like half or less compared to the specs

Of course it will be less strong - But it is remarkable, how much torque you can put into it. Maybe i'll make a test later on the day with a torque wrench.

But for a heatsink, really this is no problem.

[rob77]

the strength will something like half or less compared to the specs

Of course it will be less strong - But it is remarkable, how much torque you can put into it. Maybe i'll make a test later on the day with a torque wrench.

But for a heatsink, really this is no problem.

or with a press with a pressure gauge - make one correct in-spec thread and one with larger hole and the middle tap only , put a longer longer in both (kep few mm gap between the bolt's head and the surface of the plate with a taped hole) and try to press the screw in with a press. the one in spec will tolerate more pressure till the threads are ripped of and the joint will fail.

[kripton2035]

I bought this one on amazon.fr (build in germany)

Wow the french buying german stuff, europe becomes a success and the world is changing 

I almost have no french tools in my lab/shop...
I buy in germany when I want quality tools
I buy in uk when I dont want to wait for a month for a finaly chinese tool
I buy in china when I can wait for it
I used to buy in usa but now customs and shipping have become far too expensive from there.

german people buy in germany from german shops that have german tools inside
uk people buy in uk from uk shops that have chinese tools inside
french people have almost no valuable shop in france (all shops have moved elsewhere cheaper in europe !)
sorry but most of the valuable french manufacturers have gone

[neslekkim]

I bought this one on amazon.fr (build in germany)
very good quality and 3 tap sets for less than 25 euros

That looked like an good kit, do you have link or name of this? (Havent found the german name for these things yet)

[kripton2035]

here.
http://www.amazon.fr/gp/product/B000K2TC7K/ref=oh_details_o00_s00_i00?ie=UTF8&psc=1
but I'm not sure you can see it outer from france ?
it is a "Mannesmann 53250"

[Kjelt]

@Krypton2035 it was a joke, I come to your lovely country a lot of summers since the mid 70's and adore France, but the people were always very protective of mind in a way that, if its origin was not French it was not ok, this was for cars, wine, food etc.  With wine and food btw I still agree 

[kripton2035]

Quote from: Kjelt on Today at 22:41:04

@Krypton2035 it was a joke, I come to your lovely country a lot of summers since the mid 70's and adore France, but the people were always very protective of mind in a way that, if its origin was not French it was not ok, this was for cars, wine, food etc.  With wine and food btw I still agree 

for wine and food I also buy exclusively from france ! no offense !
but my car is a german one ...

[Kjelt]

for wine and food I also buy exclusively from france ! no offense ! 

No offense taken if I always had the choice I would do this also   

[TerraHertz]

It was interesting to learn about progressive thread cutting taps (1 & 2 stripe) taps. Also funny to see the confusion among those who didn't get that taper and progressive are different things.
I've been tapping holes all my life, and didn't know progressive thread-cut taps were available. Just the 3 end profiles: taper, intermediate and bottoming.
Which, incidentally, you can make a bottoming tap out of either of the others with a grinder, going slow to not overheat and lose the temper.

I don't think I'm ever likely to need to do progressive thread cutting. None of the machinist work I do needs that kind of sophistication. Mild steel, brass, aluminium, and very rarely a little stainless is all I ever use.

Something I'm surprised no one has mentioned, is Trefolex. It's a lubricant grease intended for tapping.
You don't need much - I was given a small vial of it by a machinist at my first job in my early 20's, and I'm still using that same vial, about 40 years later.
But if it does run out before I die (unlikely) no worries. Since some years ago I found a huge tin of it, never used, rolling around loose in the junk on the floor of an abandoned brickworks' machinists shed. So I have about 20 lifetimes supply. Ha ha... since the place had been walk-through open to anyone for decades, and there was literally nothing else left there of any interest, I can only assume that no one else of the hundreds (thousands?) who must have wandered through knew what it was.

This stuff: http://www.crcindustries.com.au/trefolex-cutting-compound
You just dip the tap into it before cutting a thread.

Another tip: if you are desperate to get a large screw or bolt into a material that is too tough to let you just force the screw in, but you don't have a tap, you can make an improvised tap out of one of the screws.
Use a very thin cutting disk in an angle grinder, and cut a groove lengthwise along the body of the screw. If you do it carefully, at the right angle, you can get a good sharp 90 degree cutting edge on the 'advancing' face of the groove. Viola! A one-flute tap. Even though the screw likely isn't tempered, it will thread-cut a few holes into materials like aluminium or hard plastics. With hardened screws/bolts, they will even thread-cut into mild steel.


For small taps like M3, 1/8" and below, I find it helps a lot to have a suitable small tap holder, that has only a short, fixed cross bar. Gives a much better feel for how the cut is going.  Like the one at bottom-right in the pic.

[neslekkim]

here.
http://www.amazon.fr/gp/product/B000K2TC7K/ref=oh_details_o00_s00_i00?ie=UTF8&psc=1
but I'm not sure you can see it outer from france ?
it is a "Mannesmann 53250"

yes, I'm seeing it, found it around on ebay also, but the cheapest seller is on holiday, so I'll try to remember it after summer, thanks!

[mzzj]

here.
http://www.amazon.fr/gp/product/B000K2TC7K/ref=oh_details_o00_s00_i00?ie=UTF8&psc=1
but I'm not sure you can see it outer from france ?
it is a "Mannesmann 53250"

I bet only thing German is the name 

Mannesman is nowadays chinese crap re-branded. With luck you can get decent product like anything else made-in-china.

[kripton2035]

I have other tap sets I bought in a shop nearby, they are single tap set, and they don't last long ...
this one has 3 taps sets and for now it's still entirely not broken.
we will see but it really seems stronger than all the others.

[WarSim]

I have searched eBay.ca many times for the progressive type tap set.  After using all the search terms I can think of I just can't find any.   There could be some from Europe but the Canadian site will show thousands unrelated items long before it will show a non-USA item.  Goofy site shows many USA only sellers before the Canadian sellers when the Canada only option is checked.  It's pathetic. 

Nothing found on the industrial tool and die sites I found either. 

Seems I am trying out retirement I don't have access to a machine shop I don't have any other sources to try. 

Well, interesting thread, but I believe it is time to give up on finding a progressive tap set.  There seems to be a mental block when it comes to anything but the tapper/plug/bottoming taps here in North America.   


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[kripton2035]

this one is for metric threads but it is available to ca ..?
http://www.ebay.ca/itm/Tap-Die-Set-metric-32-pc-High-Speed-Steel-PRO-HSS-SET-FOR-NEW-THREADS-2316-/141031593246?pt=LH_DefaultDomain_3&hash=item20d623551e

[WarSim]

this one is for metric threads but it is available to ca ..?
http://www.ebay.ca/itm/Tap-Die-Set-metric-32-pc-High-Speed-Steel-PRO-HSS-SET-FOR-NEW-THREADS-2316-/141031593246?pt=LH_DefaultDomain_3&hash=item20d623551e

I zoomed in on the picture and they look like Tapper/Plug/Bottoming sets. 
Do you have information to the contrary? 


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