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Number Drill Sets & Ba Tap sets

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Dusty13/12/2011 10:17:55
498 forum posts
9 photos

 

 

Posted by Martin Walsh 1 on 12/12/2011 17:23:20:
Posted by gerry madden on 12/12/2011 15:02:59:
Taps and dies supplied by one source (if my memory is correct) are claimed to be made in "HQS" (high quality steel?). Does anyone know what material specification is actually used ?
 
Gerry
 
 
I think the term HQS is that the tap is made out of the highest quality C45 Carbon steel
Best Wishes Martin
 

 

I think that C45 is of a similar spec to EN8

 
 

 

 

 

Edited By Dusty on 13/12/2011 10:18:44

Robert Dodds13/12/2011 10:50:48
324 forum posts
63 photos
Is nobody going to offer advice based on the material range that is going to drilled or tapped?
Few would expect to work Silver Steel or Stainless with even the best carbon steel tools unless it was in an emergency repair or something yet these materials often.feature in quite small models.
Bob D
Billy Mills13/12/2011 12:47:30
377 forum posts
Bob, you have to read between the lines on a lot of questions.If you seek advice on drills taps and dies that suggests someone is starting out in the hobby so they need the general run-of-the-mill tooling for general work with easy to work materials- could be wrong but the questioner is an early poster and there is no other data.
 
So there is no point in talking about machining exotic materials at this level, that would ony create complexity where none were needed. That kind of answer can only follow on from specifying the particular material.
 
Sometimes however your crystal ball can get foggy, there was a question a while ago about stopping machines rusting in a workshop. All kinds of helpful comments about keeping North European workshops warm and dry were made then the initiator revealed he lived in the Tropics.
 
Billy.
Terryd13/12/2011 16:50:45
avatar
1946 forum posts
179 photos
Posted by Robert Dodds on 13/12/2011 10:50:48:
Is nobody going to offer advice based on the material range that is going to drilled or tapped?
Few would expect to work Silver Steel or Stainless with even the best carbon steel tools unless it was in an emergency repair or something yet these materials often.feature in quite small models.
Bob D
 
Hi Bob,
 
I'm not sure about stainless having never really much experience using it except to know that it work hardens easily while working it, but silver steel is supplied at around 27 Rockwell while good carbon taps are supplied to cut materials up to 45 Rockwell. So decent carbon taps and dies should cope easily with silver steel. I've never had any problems with that combination. Having said that I'll probably break the next carbon tap I use in Silver Steel now that I know that I shouldn't use it.

Best regards

Terry
Mike13/12/2011 16:59:21
avatar
713 forum posts
6 photos
About 25 years ago a retired engineer gave me the full BA taps and dies set, all carbon steel, in a very neat compartmented mahogany case. All but the very smallest have been used on silver steel, yet all are still sharp enough to use, and, touch wood, I have never broken one tap. Just used one of the links in this thread to discover what it would cost to replace the complete set. Can't believe how lucky I was - I'll raise a glass to the dear old boy's memory tonight!
Martin Walsh 113/12/2011 23:39:46
113 forum posts
2 photos
Posted by Sid Herbage on 13/12/2011 00:36:18:
Posted by gerry madden on 12/12/2011 15:02:59:
Taps and dies supplied by one source (if my memory is correct) are claimed to be made in "HQS" (high quality steel?). Does anyone know what material specification is actually used ?
 
 
Sounds like a typical Far-East euphemism to me.

 

Posted by Dusty on 13/12/2011 09:28:15:
On the contrary Sid. This is a British Company who claim that the taps and dies are manufactured in the U.K. I have used their tools for more years than I care to remember and have no complaints.
 
The company mentioned above the taps and dies I think are made in India
if you log on to www.totem-forbes.com  it is a intresting website looking at the pictures
they have very good facilites and the factory is very modern and up too date
I have used totem branded taps and dies and they are very good quality
they must be one of the very few that still manufacture BA and Imperial sizes
Best Wishes Martin
 
 

 

Edited By Martin Walsh 1 on 13/12/2011 23:42:14

Dusty14/12/2011 09:06:04
498 forum posts
9 photos
Hi Martin
It just goes to show that you can read into an advert what you want to see. Having re-read the advert, I now read that the claim is the boxes and tins are made in U.K. Appologies to Sid it appears he may be right. Not withstanding any of that, I endorse Martins comment that the 'kit' is good, and I have no complaints.
Bazyle17/12/2011 12:52:29
avatar
6956 forum posts
229 photos
I endorse the comments about imperial sets being a wast of money nowadays, for Europeans anyway. It is easy to become a tool collector rather than a modeller.
 
I suggest a block of wood drilled with lines of holes for each tap size with holes for tapping and clearance drills. Saves making mistake because you thought you had learned the tapping size and didn't look it up. Then only fill it as needed. Later on when you have all the ones you really need but want to satisfy the collector instinct allow yourself to purchase one size at each exhibition you go to.
 
On the Totem/Forbes site linked above click on the 'Domestic Network' button - bit of a giveaway.
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