Omega Owners Forum
Chat Area => General Discussion Area => Topic started by: Gaffers on 16 March 2011, 18:20:12
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Kevin very kindly lent me his tap and die kit to do a couple of jobs, one of which was to drill out a stud from a seagull block. The second job is to fit a fuel line adaptor into a fuel cap to convert the fuel system ready for the boat.
I have now discovered that the tap I need is a 1/2 nc18 which is not in the kit. I have searched the web and the bay of Es but to no avail.
So I turn to the bretheren for assistance, does anyone know where I may be able to get one from?
TIA :y
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Kevin very kindly lent me his tap and die kit to do a couple of jobs, one of which was to drill out a stud from a seagull block. The second job is to fit a fuel line adaptor into a fuel cap to convert the fuel system ready for the boat.
I have now discovered that the tap I need is a 1/2 nc18 which is not in the kit. I have searched the web and the bay of Es but to no avail.
So I turn to the bretheren for assistance, does anyone know where I may be able to get one from?
TIA :y
Sorry, Guffer, just checked my 21-piece metric set and I don't recognise that size.
It apparently contains:
M3 x 0.5, 4 x 0.7, 5 x 0.8, 6 x 1
M7 x 1, 8 x 1.25, 10 x 1.5, 12 x 1.75
1/8 NPT
Double Dutch to me. ;)
Practically unused set. In fact, I can't even remember why I ever bought it! :-?::) ;)
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That's an unusual size - even SnapOn don't list a 1/2" NC18 tap, and they seem to have pretty much everything you could think of .. the closest they get is 1/2" NF20.
You're positive it's NC18?
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Kevin very kindly lent me his tap and die kit to do a couple of jobs, one of which was to drill out a stud from a seagull block. The second job is to fit a fuel line adaptor into a fuel cap to convert the fuel system ready for the boat.
I have now discovered that the tap I need is a 1/2 nc18 which is not in the kit. I have searched the web and the bay of Es but to no avail.
So I turn to the bretheren for assistance, does anyone know where I may be able to get one from?
TIA :y
Is it not perhaps a typo.: and is a std. 1/2" UNC 13 thread? :-/
http://www.carbidedepot.com/formulas-tap-standard.htm
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@ Debs : Pass, I know it is 1/2 but when I used the guage in KW's kit it showed 18. His kit only has NC so I guess that it must be NC18?
Unless UNC13 and NC18 are very very similar? I defer to other people's expertese on this one :y
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http://www.goliathinternational.com/
anything in there?^^
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@ Debs : Pass, I know it is 1/2 but when I used the guage in KW's kit it showed 18. His kit only has NC so I guess that it must be NC18?
Unless UNC13 and NC18 are very very similar? I defer to other people's expertese on this one :y
as debs chart the 13 and 18 are threads per inch so should be easily identifiable.
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@ Debs : Pass, I know it is 1/2 but when I used the guage in KW's kit it showed 18. His kit only has NC so I guess that it must be NC18?
Unless UNC13 and NC18 are very very similar? I defer to other people's expertese on this one :y
as debs chart the 13 and 18 are threads per inch so should be easily identifiable.
My money is on a standard NF20 thread rather than NC18..
Is there 1" of thread, Guffer? If so, stick a rule against it and count the threads ;)
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Yeh, check it carefuly, on 1/2 inch UNF is 20 and UNC is 13.
If its into a cast block then it often is UNC if there is any load on it and would most likely be a stud (with UNF at the other end of the stud). low load is sometimes UNF but then it tends to be a bolt.
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Just double checked: the 13 and 20 do not fit the guage but the 18 fits perfectly :-?
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the 13:
(http://i287.photobucket.com/albums/ll138/mrgaffney/SU1BRzAwMjAuanBn.jpg)
the 18:
(http://i287.photobucket.com/albums/ll138/mrgaffney/SU1BRzAwMjUuanBn.jpg)
The 20 is a similar result to the 13
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Are you sure its 1/2 and not 9/16?
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My money is on a tapered thread. 1/4 NPTF perhaps? Outer diameter just over 1/2" and 18TPI.
Kevin
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Ah.. brainfart.
It's -5AN, for which the SAE thread size is 1/2-20: http://en.wikipedia.org/wiki/AN_thread
Which explains the 20tpi, but not where you can get a tap to match - but it's a direction, at least. Is there a pirtek near you, or other hydraulic hose supplier? They might well have the required tap since they deal commonly with AN fittings..
[edit] Assuming it's not Kevin or Mark's suggestions :)
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I tried a 9/16 nut on it earlier, it was very loose as it tighten but it did bite. Not sure it would be water-tight though hence why I thought it was 1/2, that and multiple references on the web to this type of adaptor being a 1/2 thread......
.... but if 9/16 nc18 is more likely then I will try and find that :y
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Ok I saw some dutch in the threads above......anyone care to translate ;D
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I reckon take it to an engineering shop and slip them a tenner to thread it in their lunch hour. Roe engineering in Fleet worth a call? Probably plenty of options closer to you, though. Failing that, AHC in Camberley would be a good bet. Take it along and they'll at least tell you what it is and possibly sell you a tap.
I have a UNF tap and die set, BTW. Goes up to 1/2-20 but doesn't sound like it'll help?
Kevin
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Sounds like a plan Kevin. I think you're right about the 1/4 nptf. I'll give them both a try tomorrow :y
Are you around Sunday for me to return your kit?
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Guffer with what i saw a few weeks ago and with my navy life as an engineeeeeeeeer why have the lads not got what you need have you asked :-?
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Guffer with what i saw a few weeks ago and with my navy life as an engineeeeeeeeer why have the lads not got what you need have you asked :-?
Trust me, I spent many an hour rumaging but as this was a tapered thread it is different. If a LR has any it comes as parts of a replacement part thus difficult to pinch.... in fact its impossible due to the new fault reporting system.
I also have got the seagull working now so once i have this and a couple more modifications done she'll be ready to get slapped on the back of Jenny :y
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"Tap and Die".......
.....`sounds like it might be a very-dodgy plumbing firm. ;D
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"Tap and Die".......
.....`sounds like it might be a very-dodgy plumbing firm. ;D
Or even the start of a very interesting thread. [smiley=laugh.gif]
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Failing that, AHC in Camberley would be a good bet.
You need to get out more Kevin, they moved to Farnham ages ago ;D
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Failing that, AHC in Camberley would be a good bet.
You need to get out more Kevin, they moved to Farnham ages ago ;D
Who should be getting out more? ::) ::) ;D
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Failing that, AHC in Camberley would be a good bet.
You need to get out more Kevin, they moved to Farnham ages ago ;D
Who should be getting out more? ::) ::) ;D
;D ;D
Only knew that because we were working next door to the fire station last September and needed a 6" core drill, at least that's my excuse and I'm sticking to it :)
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.......working next door to the fire station........
:-* Ooooh-lovely.......Firemen! :-*
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Failing that, AHC in Camberley would be a good bet.
You need to get out more Kevin, they moved to Farnham ages ago ;D
I know they have a branch in Farnham. Has the Camberley one gone?
Oh, well, I have no reasons to visit my old home town now. And, actually, that suits me fine. ;D