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| Boro Room -- For Boro-related tips, techniques, and questions. |
2010-10-02, 7:47am
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hi ho hi ho its off to ..
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Join Date: Oct 27, 2007
Location: Odessa, Ontario, Canada
Posts: 289
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What tips for a National 3A
I'm thinking of buying a premix National 3A to do some Boro work with I presently use a Nortel Mid range which is great but the flame is too large when wanting to work smaller items or in tight spots.
what size tips would be the best to start with ? OX2 /3 /4 or get a range
thanks
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2010-10-02, 2:59pm
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formerly Marella
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Join Date: Feb 19, 2007
Location: London, Ontario, Canada
Posts: 638
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Oooh, I'd love to hear some feedback too....I have the same setup, midrange with a minor on top.
I took a course at the Pittsburgh Glass Centre this summer, and Robert Mickelsen was teaching a flameworking course (it was full so I took another course), but they were using National 3A's for the networking pieces they did...spectacular!
http://www.mickelsenstudios.com/contents.html
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Gillianbeads (formerly Marella)
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2010-10-02, 3:03pm
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Senior Member
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Join Date: Feb 09, 2006
Posts: 219
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I have the national ox2-5 and they are good although you have to turn down the pressures on the smaller sizes I have found. I also have a HTC-1 and a HTC2
I would think you could do with a ox2 and ox4 and the HTC-1 If you are looking to go small you might look into the smith little jewlers torch or the meco midget. I use my small smith on a daily basis for small welds and details in places that the National cant reach. down side to the smith mini is you will need a inline regulator to turn the pressures way down.
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2010-10-04, 4:06am
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product of the universe
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Join Date: Sep 06, 2005
Location: Rutvegas Vt
Posts: 598
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This is the best tip i have ever used http://www.etsy.com/listing/31823332...or-lampworking I use the 55 hole tip. It's very hot and clean.
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Chris
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2010-10-04, 7:55am
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Senior Member
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Join Date: Sep 02, 2008
Location: Bloomington, IN
Posts: 952
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i wouldn't go with anything less than the ox-3. the 4 and 5 are also great.
must say though, that the ht and htc tips are worth a look. htc1 and htc 2 are great tips. nice center hole with a ring of holes around it. they also are MUCH more quiet than the ox tips
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2010-10-10, 4:27pm
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Senior Member
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Join Date: May 31, 2009
Posts: 368
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I can run my OX-3 at its maximum using 7lpm. My OX-1 consumes only 3lpm.
Here is a pic of my OX-3 running on 1/4psi propane and 10psi oxygen, 7lpm.
I also have a 18(i think) hole tip that gets red hot after a few min at 10lpm, so you need tanked for that.
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Melting boro with a National 3A and and two Devilbiss 5lpm 10psi concentrators.
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