Re: Pipe threading on a mini lathe ?
You can use the compound to cut the taper with no problem; what you can't do is cut threads on a taper without a taper attachment. Roy
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Roy
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#66446
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Re: Pipe threading on a mini lathe ?
A second option is to insert a mill boring head sideways in the tail stock. You can use the screw adjuster to accurately set the taper. You will need a 60 degree center on a piece of stock Later....
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Randy Smith
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#66445
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Re: Pipe threading on a mini lathe ?
You can buy a tool called a "nipple chuck" for this very purpose. Alan
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Alan Muller
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#66444
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Re: Pipe threading on a mini lathe ?
I need to be able to create/re-thread close pipe nipples and initially figured to use the lathe to do it. However, I ended up taking the 'easy' way out - I fabricated an expandable mandrel out of 1"
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olduhfguy <phbrush@...>
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#66443
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Re: Pipe threading on a mini lathe ?
No I actually meant the headstock, I have a couple of "antique lathes" and giving the headstock a little bit of yaw is much easier on them than on the Mini! Doing the same on the mini, well you will
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John Kiely
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#66442
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Re: Pipe threading on a mini lathe ?
John,did you mean to say offsetting the tailstock? Offsetting the headstock would be more trouble than it's worth. You did give me an idea though,how about putting a 60¡ã point on a short round ,off
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mike kolchins
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#66441
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Re: Pipe threading on a mini lathe ?
John, That might work for very short sections of pipe, as they'd need to be between centers.
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Bill <mister.bill@...>
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#66440
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Re: Looking at buying the 7" x 10" w/ Questions
Tom, The power and righty required for a given depth of cut and feed rate are dependent more on tool geometry than anything else. With the proper tool geometry you will be able to take a much heavier
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OldToolmaker
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#66439
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Re: Pipe threading on a mini lathe ?
In one of my lathe books there is a profile for a usable approximation of tapered pipe thread intended for single point cutting. Bear in mind that normal pipe thread has a helical leakage path and
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Alan Muller
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#66438
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Re: Pipe threading on a mini lathe ?
My thought on this, is "Who needs a tapered thread?" My answer is "Pipefitters". When I was a pipefitter, I had a nice tripod vise and a set of pipe dies. I still have 'em, but haven't used 'em for 50
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MERTON B BAKER <mertbaker@...>
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#66437
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Re: Pipe threading on a mini lathe ?
That is how it's done on the Unimat DB/SL, and the Sherline. Both types have a pin to realign the HS. On the 7xs, the top slide can be used to cut short tapers, and even long ones, If necessary. Mert
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MERTON B BAKER <mertbaker@...>
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#66436
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Re: Pipe threading on a mini lathe ?
A pipe threading machine cuts rough taper threads, because that is all that is required to join pipes to fittings,it cuts fast and in one pass. A machine taper thread is a totally different animal. To
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john baird
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#66435
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Re: Pipe threading on a mini lathe ?
I don't think I would recommend this but has anyone tried offsetting the headstock a fraction of a degree?as can be done on older lathes? My little mini has it's cowl removed now and it would be
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John Kiely
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#66434
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Re: Retainer, cross slide screw (metric)
One of the advantages of the button head screws is that you can use a ball end Allen wrench in an electric screwdriver to provide power feeds for the top & cross slides. If you use your top slide to
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MERTON B BAKER <mertbaker@...>
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#66433
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Re: Pipe threading on a mini lathe ?
You can certainly cut a taper that way, Chris, but the problem is how to cut a thread along that taper; that's when you need either CNC or a taper turning attachment to do a good job. Assuming the
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andyf1108
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#66432
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Re: Online metal supplier
Hi Mark, Discount Steel has a location just northwest of Fort Worth, Texas, where I have done business with them on several occasions by calling in orders and picking them up. They seem to be good
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Tom King
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#66430
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Re: Online metal supplier
Take a look at their shipping charges for small quantities. Can easily double the cost. Gordon
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Gordon
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#66429
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Re: Retainer, cross slide screw (metric)
thanks gerry, andy and ajawa, thats the part I was looking for, and it has all of the dimensions!
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Stefan
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#66428
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Online metal supplier
Has anyone in the group bought stuff from www.discountsteel.com? I was pricing some 6061 aluminum bar and they had the best price I've seen -- less than half the price of the competition. CRS bar
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Mark Kimball
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#66427
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Re: Pipe threading on a mini lathe ?
You can also use a protractor to adjust the compound to get VERY close. This one is CHEAP but surprisingly accurate. http://www.harborfreight.com/multipurpose-angle-finder-1028.html Chris
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Chris Bailey <cbailey73160@...>
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#66426
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