Gallery, Projects and General > How to's
How to make a internal/external threading tool on your lathe
Lew_Merrick_PE:
--- Quote from: fatal-exception on August 25, 2010, 12:29:43 AM ---First off, i looked for quite some time at buying an internal threading tool that uses inserts, but the cost was rather prohibitive. Not to mention that they tell you that you need different inserts for different pitch ranges. BS I say. I'm not spending hundreds on pro tool holders and inserts. I don't need to do production threading, so I can't justify the purchase.
--- End quote ---
Please note the qualifier "I don't need to do production threading." So long as sharp-corner v-threads are what you need, this will work fine. However, if your work is subject to inspection to any of the formal standards, you will be in a world of hurt. Each pitch has a specific radius at the root/crest (external/internal) thread that is required to qualify under formal standards.
I realize that I am being pedantic here and that most here would not need to meet formal standards, but the caveat is something that should be known -- even by those who have no need of the formal standards compliance in their work.
Artie:
Ive had a thought, if we can make this thing turn in a half circle while being used internally, we can use it like the swing up tool Bogs wrote up.... the head is spinning this over.... I might investigate this further... liked the concept, but fo rexternal threading I cant se a benefit over a 60 deg tool... internally though.... oportunities.... :proj: :nrocks:
Bogstandard:
Artie,
I have already come up with an easy design that 'should' work for as a swing up internal thread cutting tool, both left and right hand, and it would use a cutting tool made similar, but not quite the same design as this one shown here.
Unfortunately I can't see it being put into metal for a fair while as I have a massive backlog that needs to be cleared up first.
When eventually it gets to the top, unlike the other one, it will all come as a one lump post, just to make sure the idea and concept isn't pinched and put into production before it is finished and proved on here.
Maybe someone else would like to come up with an idea and preempt me by showing it on here.
Bogs
Divided he ad:
--- Quote ---Maybe someone else would like to come up with an idea and preempt me by showing it on here.
--- End quote ---
Hehe.... I could just use the design you told me about when I was over at your house last month John :poke: :lol:
Obviously I won't, not that kind of chap :thumbup:
Upside is.... I know what people are talking about on this whole thread due to the multiple conversations Bogs and myself have had over my fear of threading issues :beer:
Paul, nice work as far as I see.... Not upto some standards apparently, but if it works.... :thumbup: Basically I'm liking the whole thread :doh: What a loverly pun for 8am :)
Ralph.
Artie:
Pssssssttt...... Ralph..... :wave:
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