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View Full Version : Hardinge Dovetail Bed ?



NAIT
02-27-2004, 06:26 PM
There is a machine in the toolroom where I work that is called a "Hardinge Dovetail Bed". It looks like a simple lathe with no carriage and no tailstock. The headstock has a collet system.

What is this machine and what is it used for ?

SGW
02-27-2004, 07:08 PM
Sounds like what is known as a "second operation lathe." Other people undoubtedly know more about their use than me, but my understanding is they're used for specific (generally fairly simple) operations for which a full-blown screwcutting lathe is unnecessary.

x39
02-27-2004, 07:49 PM
Sounds like the machine is a toolroom type that is missing some parts. I may be wrong, but I don't think the second operation machines or the DV-59 model maker's lathes have a dovetail bed.

NAIT
02-27-2004, 08:42 PM
<font face="Verdana, Arial" size="2">Originally posted by SGW:
Sounds like what is known as a "second operation lathe."...my understanding is they're used for specific (generally fairly simple) operations for which a full-blown screwcutting lathe is unnecessary.</font>

Turns out to be Hardinge Model HSL-59 "Simple Operation Lathe" - a really weird-looking lathe with a dovetail bed about 10" long and no tailstock. See http://www.lathes.co.uk/hardinge/page10.html for a photo. The entire lathe sits on a pan about 2'x2'. Contrary to what I said above, it does have a sort-of carriage.

So what would this lathe be used for and why would Hardinge put its prestigious name on such a simple lathe ?

There are a couple on EBAY: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3800169368&category=57032 and http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3800672145&category=57032

[This message has been edited by NAIT (edited 02-27-2004).]

Evan
02-27-2004, 08:50 PM
My guess is that it is a very well made simple lathe.

J Thornton
02-27-2004, 11:08 PM
NAIT
I agree with SGW. A second operation unit or for a very simple machining job in a production shop.
For example if you needed 10,000 pins with a chamfer on both ends. Order ground & polished bar stock. Put a bar feeder behind that lathe and clamp a stop to the bed. Use a form tool in one station to cut both front and back chamfers and put a cut off blade in the other. One push and pull and you have your part. Hit the collet lever and feed out the stock.Use a chute to catch the parts in a basket and you don"t even have to touch them. After you make your 10K pins change the collet or reset the stop and make your next order.
At one point I worked in the track link pin & bushing dept. We made the same basic things (Pins & bushings) 2shifts a day for several years only the size varied,
As to why Hardinge would make something like this: they want to sell machines and the buyer dosen"t need or want all the bells and whistles. If Hardinge wouldn't make it someone else would be happy to.


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Jesse

JCHannum
02-27-2004, 11:11 PM
All of what Jesse said plus it will accept all the tooling for a Hardinge lathe. Many shops use both styles for different work and don't need to invest in very expensive additional tooling for these machines.

wierdscience
02-28-2004, 12:12 AM
We had a sec.op turret lathe by Hardinge,very handy,The lathe you guys have is good for blanking too,it can be fitted with a parting tool holder that mounts directly to the headstock and parts off close to the spindle nose,you can run a piece of material through the headstock and part off whatever lengths you need all day long,great for making spacers out of tubing.Wish I had one.

[This message has been edited by wierdscience (edited 02-27-2004).]

J Thornton
02-28-2004, 12:42 AM
Thinking back to my days in pin & bushing another thing is that when a company buys a machine they usually don't think about reselling it so they only purchase what they need to do the job. Run it till it dies. All but one piece of equipment in the department came from one of the other plants. All antiques, but fairly well maintained. The bushings, on the other hand, were rough cut in the automatic screw machine dept. from tubing. They had pulled a 6 spindle Acme out of the scrap heap to use specifically for cutting bushings. It had so much slop in it that it would only hold about .125" in length. We took care of the variation on tracer lathes.
Several years after pin & bushing was shipped off to another plant they were still using that Acme. Just not for anything that had a critical tolerance in length.

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Jesse

J Thornton
02-28-2004, 12:53 AM
Wierd

Look more closely at NAIT's second posting, both of those e bay items are still up for bid. Now's your chance. http://bbs.homeshopmachinist.net//smile.gif http://bbs.homeshopmachinist.net//smile.gif

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Jesse

wierdscience
02-28-2004, 01:53 AM
Welp,there goes my mad money http://bbs.homeshopmachinist.net//biggrin.gif

wierdscience
02-28-2004, 01:57 AM
Rats!One is in LowerPodunk,Egypt and the other has that@*!@#$%tapered spindle nose!Oh well maybe next time.

Milacron of PM
02-29-2004, 11:12 AM
The common name for the HSL 59 is simply a "speed lathe", as the most common use is chucking work to be polished which is typically done at high rpm. The Hardinge is different from most other speed lathes in that it does have that little bed for accesories....so I suppose "simple function lathe" is not a bad description either....but the likley comment from an old timer would be "we need these polished, go over to that Hardinge speed lathe"

The longer tailstock/turret versions, the DV and DSM 59 lathes do have dovetail beds.