|Andrew Tinsley||02/09/2018 16:32:50|
|1180 forum posts|
I was idly looking at taps and dies on Ebay and noticed that a fair number of cheap sets claimed to be tungsten steel. Is this some form of Chinese hype or is there really an intermediate type of steel between HSS and carbon for taps and dies?
|578 forum posts|
probably a new kinda cheese.......
only buy HSS, even the Chinese versions are better than the carbon sort...
|Andrew Tinsley||02/09/2018 16:55:08|
|1180 forum posts|
I never said that I would buy them! I usually buy carbon taps and dies from Tracey, unless it is a well used size when I buy HSS.
I actually find that The Tracy tools carbon taps are sharper than say a Presto HSS tap. I do realise that they won't stay that way for long with a lot of use.
6330 forum posts
It's a real thing, or rather a family of alloys. In short:
As always, simple descriptions like 'HSS' or 'Tungsten Steel' are often pretty meaningless. If it really matters you need to see a proper specification. Brand names and broad generalisations are often abused by salesmen or misunderstood by customers. But it's likely that Chinese Tungsten Steel taps will outperform Carbon Steel taps, and they may be much better value used manually than much more expensive HSS types.
|Ed Duffner||02/09/2018 18:04:47|
|810 forum posts|
I've seen some of the TiN (Titanium Nitride) coated tools advertised as titanium.
2051 forum posts
I have personally found that even the el cheapo, carbon steel taps/dies are excellent from tracy's tools. Definitely a good supplier of that kind of stuff.
The teeth seem very sharp, a cut above the set variety.
Edited By Michael-w on 02/09/2018 18:27:25
|Mick B1||02/09/2018 19:19:55|
|1729 forum posts|
|I've found the tungsten steel tap and die sets from Machine Mart are good for all normal use and serve well for years.|
|John Rudd||02/09/2018 20:22:36|
|1396 forum posts|
I have three sets of their t' n' d's...Metric/UNF\UNC etc...served me well, although I managed to break an M12 die....It is undersized for the job at an Inch in diameter...
My BA set is from Tracy tools, another set from RDG as well as ME sizes from them too...Then I have the odd HSS sizes gifted to me...
|Bill Phinn||02/09/2018 23:04:10|
|371 forum posts|
Toolstation's 40 piece Silverline tap and die set, currently priced at £34.84, is described as "made from tungsten steel". I bought a set chiefly because it contains taps and dies of two different pitches for each size, and it struck me the set might be useful for that reason.
I've also got the Aldi set, which was £14 when I bought it a few years ago. I think that one is just carbon steel. The first holes I ever tapped were with the Aldi set - 8 blind M3 holes in mild steel about 10mm deep. Fortunately I tapped all the holes successfully even though the only tap supplied was a taper tap.
I think the taps and dies in both sets are serviceable but I don't think the same can be said for the supplied tap and die wrenches, which seem nearer in consistency to cheese than metal. Fortunately there are plenty of better wrenches to be had for not much second hand.
|Rik Shaw||03/09/2018 09:24:09|
1365 forum posts
I bought an unused 45 piece "tungsten steel" tap and die set made by HILKA from the boot a fortnight ago for a fiver. I have only used the 8mm tap once in a lump of MS by hand and it threaded the hole as well as a DORMER HSS would have. However, I would not expect it to stay as sharp for as long as a top quality HSS version.
|Russell Eberhardt||03/09/2018 13:26:57|
2600 forum posts
Most of my taps and dies are carbon steel including some Dormer branded ones. I never use them at high speed, and thus high temperature, so see no need to pay extra for high speed steel. Most of mine have lasted 50 years and many were not new even then.
It has been said that carbon steel holds a better edge than HSS but I can't say I've noticed the difference.
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