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[machinist] VFD use with3PH achines - 220 A Precision Jewelers Lathe
- From: Lawrence London <lfljvenaura@gmail.com>
- To: machinist@lists.ibiblio.org
- Subject: [machinist] VFD use with3PH achines - 220 A Precision Jewelers Lathe
- Date: Mon, 2 Jun 2014 22:36:06 -0400
VFD use with3PH achines - 220 A Precision Jewelers Lathe
http://www.practicalmachinist.com/vb/general/precision-jewelers-lathe-285998/
http://www.practicalmachinist.com/vb/general/precision-jewelers-lathe-285998/
One like this I used many years ago , it's a watch makers lathe a to small for what your needs are. I would guess a Unimat or something better like a Swiss Weiss .
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Type hardinge into ebay, type schaublin into ebay...compare the results.
You will also find that things like expanding collets, emergency collets, or just standard collets are MUCH easier to find for a 5C spindle nose than a german or austrian? made machine....likely available at import prices as well.
The downside to the hardinge is that you'll likely end up dealing with 3 phase power....but it's not a problem, it's really not a problem. Seriously, it's not a problem, it costs you an extra $100 up front, and then you'll have full control over the speed of the lathe as well. (I can't get people to understand that 3 phase motors are really easy to deal with) -
To expand on three phase power, which is what almost all Hardinge lathes need: First, you must get a machine that uses 220 to 240 volt three phase power. Stay away from a machine that needs 440 or 550 volt power. It is easier to deal with a machine that has only one motor in it, so that means a belt drive step pulley machine. The old TR59 and 1946 model DV59 lathes have 3/4 HP motors. Avoid variable speed, like a post -1960 DV59 will have unless you want to deal with more complex control issues.
Originally Posted by snowman
Type hardinge into ebay, type schaublin into ebay...compare the results.
You will also find that things like expanding collets, emergency collets, or just standard collets are MUCH easier to find for a 5C spindle nose than a german or austrian? made machine....likely available at import prices as well.
The downside to the hardinge is that you'll likely end up dealing with 3 phase power....but it's not a problem, it's really not a problem. Seriously, it's not a problem, it costs you an extra $100 up front, and then you'll have full control over the speed of the lathe as well. (I can't get people to understand that 3 phase motors are really easy to deal with)
Now the easy part. Get a 1HP capacity 120 volt single phase in/240 volt three phase out VFD (AC drive) and hook it to the high speed motor inlet wiring on the lathe. Pick a VFD with digital display and a speed control knob and fwd/rev button. An enclosure with no holes for chips to enter is a good thing. Then you plug the thing into any household wall outlet and the lathe is running. You don't even need a 220 volt outlet in the shop.
Larry -
Ok, Hardinge comes up with 868 results on eBay while Schaublin 98 results. It seems Hardinge is a more common machine and a lot more accessories are sold for it.
For Hardinge, the machines I'm seeing are the DV59 and the HLV-H
Can anyone speak about the quality of these machines? Are there other brands that I should consider? I'm really a sucker for pride of ownership.
Originally Posted by snowman
Type hardinge into ebay, type schaublin into ebay...compare the results.
You will also find that things like expanding collets, emergency collets, or just standard collets are MUCH easier to find for a 5C spindle nose than a german or austrian? made machine....likely available at import prices as well.
The downside to the hardinge is that you'll likely end up dealing with 3 phase power....but it's not a problem, it's really not a problem. Seriously, it's not a problem, it costs you an extra $100 up front, and then you'll have full control over the speed of the lathe as well. (I can't get people to understand that 3 phase motors are really easy to deal with) -
I disagree with the 440/550 comment...it just adds another hurdle (and $100), but it's far from being insurmountable.
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06-02-2014, 10:12 PM #10
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The thing you need in a lathe like that is "flexibility" of workholding, and Hardinge invented the concept. My understanding it that a Schaublin 102 is a fine lathe, but the Hardinge 5c system is available everywhere, inexpensive, and versatile. A least in the Norhteast, accessories for Hardinge are common and inexpensive, compared to Schaublin. The Hardinge stuff is always available on ebay, though prices range from inexpensive to opportunistic, as with any high end gear.
Maybe you've already comparison shopped:
Page Title
"Early" hardinge precision bench lathes (ESM models) are often referred to as "split bed". Although the company predates Schaublin by quite a few years, it is a similar bed style. These are often available for under $500. For that price it should include a lever collet closer, a compound, and a tailstock. Or alternately, a bed turret and quick acting cross slide.
Catarcat Lathes
Later models (DV-) are referred to a dovetail beds, and tend to bring quite a bit more because they are still used for second operations in some production facilities. All he accessories are up-graded, too, but possibly overkill for your needs.
Hardinge DV-59, DSM-59, TFB-H, HC-AT, HSL-59 & HC Lathes
Hardinge HLV-H Lathe
Either brand, get as much tooling as you can. The bare bed and headstock of either brand should not cost much money at all; it will usually be more difficult & costly to add tooling than to get it as a package. (by "tooling" i mean lever collet closer, cross slides of various types, a tailstock, a turret, and all the small tools and holders that go on a turret. Plus collets, expansion collets, and chucks, etc)
good luck!
smt -
This is a TR59. Many thousands were made during WWII and look it. Simple to run. Will not cut threads, but why thread a ring? Ideal for rings from bar stock. Hardinge Lathe for Shop Garage or Restore in Good Running Condition Video | eBay
If you want to thread a ring, you want an HLV-H. Some would say it contends for the title best precision lathe ever made in America. If you want a brand new one, you have to buy a Taiwan copy. But there are well-rebuilt HLV-H machines available for a large price.
Larry -
06-02-2014, 10:16 PM #12
- Join Date
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- Location
- downhill from Twain\'s study outside Elmira, NY
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Read Tony's raves on the links provided to Hardinge stuff.Can anyone speak about the quality of these machines?
Schaublin has the cachet of being "rarer" and Swiss, but it is definitely _not_ a better lathe than a Hardinge.
After that, you just have to settle on the model type, and the condition, which ever way you finally go.
smt
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- [machinist] VFD use with3PH achines - 220 A Precision Jewelers Lathe, Lawrence London, 06/02/2014
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