Using a die

This topic has 9 replies, 6 voices, and was last updated 13 March 2011 at 06:32 by Ian S C.

Viewing 10 posts - 1 through 10 (of 10 total)

Author

Posts
11 March 2011 at 22:52 #65364
tsb
Participant
@tsb
What diameter bar do I need, to use a 6mm die.
Advert

11 March 2011 at 22:52 #5442
tsb
Participant
@tsb
11 March 2011 at 23:31 #65365
Mogens Kilde
Participant
@mogenskilde92996
Well – If you mean to cut a metric M6 thread, you should use a Ø6 mm bar – approx. 1/4″ in imperial measure

Mogens

Edited By David Clark 1 on 13/03/2011 10:31:21
12 March 2011 at 00:00 #65366
dcosta
Participant
@dcosta
Hello Mogens!

Because I am interested in information You may have in Your site related to opening thread in bar using die, I visited Your site but could no found that information.

Can You please be more specific on the way to find that information in Your pages? Please…

Thanks in advance

Dias Costa
12 March 2011 at 07:45 #65368
JasonB
Moderator
@jasonb
I think the link is just part of Mogens signiture, not a link to using a Die.

David, Morgens link also takes you to his commercial site where you can buy plans, is advertising in this form permitted on the forum??

Jason
12 March 2011 at 07:53 #65369
Terryd
Participant
@terryd72465
Hi tsb and Dias,

Any metric thread is measured and signified by the nominal diameter of the male thread e.g. the bolt. Hence M4 is made from 4mm bar, M6 from 6mm bar, M8 from 8mm bar and so on. When using a tap to cut a thread the nominal diameter of the hole is measured from the bottom of the thread, plus a bit of clearance. these tapping diameters are to be found in standard tables.

You can get a very useful free utility program giving all the information about threads and much, much more data from Colin Usher’s site, it is called ‘Model Engineers Utilities‘.

Regards

Terry

Edited By Terryd on 12/03/2011 07:54:35
12 March 2011 at 08:26 #65371
JasonB
Moderator
@jasonb
Unless its a rolled thread which uses smaller than nominal bar but thats a bit outside ME practice

Same with tread forming taps they use a larger tapping drill

J

Edited By JasonB on 12/03/2011 08:28:39
12 March 2011 at 10:26 #65374
Ian S C
Participant
@iansc
Jason, related to rolled threads, a few months ago I was given a few fluteless taps,2BA, 6BA and 8BA, the tapping sizes are a wee bit bigger than normal, as the thread is not cut, but formed much the same as a rolled thread. I was a wee bit worried as my book says machine only, and the smallest should be run in at 22,000rpm, so I put a 6BA tap in my tap wrench, took a bit of aluminium , drilled it,and put the tap through, it just sailed through, much easier than a conventional one, the 2BA went just the same, tried it on brass, just the same. They are not for use on steel. Ian S C
12 March 2011 at 13:14 #65385
JasonB
Moderator
@jasonb
Yes good in softer materials, though I probably wouldn’t risk the smaller sizes in hard brass.

J
13 March 2011 at 06:32 #65397
Ian S C
Participant
@iansc
Jason, I tend to agree.

I suppose that the nearest thing that one could find for rolling external threads would be one of those machines for threading spokes, it uses three rollers, and is hand cranked. Its not impossible to find one of these, I got one at a second hand shop in Christchurch NZ about 20 years ago, it went to a collector working in a bike shop. It had a complete set of rollers. Ian S C
Author

Posts