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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Re: Looking at buying the 7" x 10" w/ Questions
Most of the out of warranty problems are with the speed controls; it's usually just a matter of replacing the power MOSFETs, there are some exceptions. Some of the play in the handwheels is inherent
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Roy
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#66425
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Re: Looking at buying the 7" x 10" w/ Questions
1. Yes, no problem if you listen to the machine to figure out a reasonable depth of cut. 2. No different than on any other engine lathe; the change gears for threading have to be installed manually -
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Roy
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#66424
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Re: Drill Rod
No x 3! Drill rod comes in 3 common types; water, air & oil hardening. They're all basically high carbon steel with various other alloying elements that affect hardening & toughness. Here are some
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Roy
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#66423
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Re: Pipe threading on a mini lathe ?
You need a taper attachment to cut a truly accurate tapered thread. Considering their uses, that's almost an oxymoron! Without a taper attachment, the work-around is to cut a stepped thread & refine
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Roy
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#66422
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Re: Digest Number 5845
Yes, I see it's gone now. But there are still lots of many different parts 3D modeled. There is a lot of different CNC models, routers, lathes, mills, etc. Some of the brackets/motors/parts are
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Armilite@...
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#66431
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Re: Retainer, cross slide screw (metric)
See if these look like what you have: http://home.comcast.net/~ajawam4/cross_screw_mount.pdf DWG - ACAD2000: http://home.comcast.net/~ajawam4/cross_screw_mount.DWG You can get the 3D models from
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WAM
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#66421
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