Gear Cutter Value

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Gear Cutter Value

New postby Pete Cronos » Thu Apr 26, 2018 9:26 pm

I have a Gear Cutting Machine that I am trying to determine fair market value so I can offer it for sale.
It comes with 53 index plates.
See photos
Any info appreciated
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Re: Gear Cutter Value

New postby 4brokenow » Thu Apr 26, 2018 10:17 pm

Pete,

Which model is that? Any idea?

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Re: Gear Cutter Value

New postby Marty101 » Thu Apr 26, 2018 11:23 pm

WOW.
Just had to comment. :shock: That's all I have!!
Keep winding things,
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Re: Gear Cutter Value

New postby Pete Cronos » Fri Apr 27, 2018 2:17 am

Hullhorst Tools is the only marking on the machine.
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Re: Gear Cutter Value

New postby 4brokenow » Fri Apr 27, 2018 2:34 pm

May be another dumb question but what do you use in the tooling to actually cut the profile?

Is it possible this machine is a one-off?
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Re: Gear Cutter Value

New postby Stephan » Sat Apr 28, 2018 7:01 am

I did a search on Hullhorst and there is not much about made by them. They go back to the 1900's
All I could find was a number of specialized cutting machines for making armatures.
https://www.worthpoint.com/worthopedia/ ... -137748711

By the look of the machine it looks to me it "might" have started life as a bench top surface grinder of some sort.

Bit like this - http://www.graysonline.com/lot/0015-300 ... 50-x-125mm

Some were very basic like this one - http://www.practicalmachinist.com/vb/an ... er-277241/

It appears to have been altered to its current purpose.

The gears look like a set of change gears from something else again. They are marked for a different maker. Again modified to suit.

This is the sort of thing Model Engineers are very good at doing. making something out of something else.
It appears to have been well made.

As for value I doubt you will find another. It will be more a case of who wants it and how badly.

Someone into making clocks would love it.
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Re: Gear Cutter Value

New postby Pete Cronos » Sat Apr 28, 2018 11:49 am

You can use Bergeon or Thornton or other brand of gear cutters. You could also make your own cutter and arbor that you could
use to cut gears.
I am not sure what this machine initial use was but it now includes a large group of index plates ( Could be change gears) that
can be used in indexing for gear cutting. Also someone could mount a different type of indexer if wanted. It looks like someone
took the time to convert it to a decent gear cutting machine.
It came out of a clock makers shop a few years ago.
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Re: Gear Cutter Value

New postby Pete Cronos » Sat Apr 28, 2018 11:54 am

A while back when I attempted to do some research on this machine another
person contacted me that also had the same machine. His had bad bearings and he
gave it to me. I still have it but not sure if it is complete since the precious owner
had disassembled it in his attempt to replace the bearings. It did not include any
accessories. So actually I have two machines but accessories for only one.
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Re: Gear Cutter Value

New postby Stephan » Sun Apr 29, 2018 12:44 am

I would try contacting a local to you model engineering club or web site.
I know there are a number of different clock plans available and there are numerous other projects those guys build that need gears.
Model traction engines for example.
I was a member of such a club here and know the club owned a small gear hobbing machine that was available for members to borrow for gear making purposes.
They may be able to give you some idea of value and might even put an add up for you within their group.
My train club has done this a few times when approached by people looking to dispose of something interesting.

One very popular tool is the Quorn tool and cutter grinder. Lots of them about and all home made even though many don't look it.
http://www.lathes.co.uk/quorn/index.html
They usually sell for a good price.
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Re: Gear Cutter Value

New postby Stephan » Sun Apr 29, 2018 12:58 am

It just occurred to me that this bloke http://www.lathes.co.uk/ would be worth contacting.
He may know a bit more about Hullhorst and would be interested to see your machine and might wish to add it to his already massive machine tool data base.
I had a quick look and couldn't see it mentioned.
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Re: Gear Cutter Value

New postby Pete Cronos » Fri May 04, 2018 11:05 am

If anyone is interested I am going to offer it for $1500 and see if any interest develops.
It is in Northeast Arkansas but I do some traveling and may be able to meet someone
to cut down on travel.
Thanks
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