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Discussion Starter · #1 ·
I've been searching for months for a local deal on a surface grinder. I'm looking for a 6x12 and I just missed a deal on a Boyer Shultz in great shape near Locust Valley last month.

Anyway, I came across this one here: http://www.ebay.com/itm/Harig-Super-612-Surface-Grinder-/331630346890?hash=item4d36b5828a
The price is right provided it runs. My question is, is it worth it? I won't be able to test it before I buy.

The nice thing is I can still find Harig replacement parts but the price is insane!! Spindle bearings go for $350 and an oil pump is $475!

I don't even know what to look for; all I know is I need one and I will have to get a vfd to convert it to single phase power. Any help, info, tips are greatly appreciated!!
 

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I've been looking at getting one for years. If you wait you can pick them up for next to nothing it better condition then the one you linked too.

The magnetic chucks cost bucks new so you want one with it

All of this stuff if made to run in a factory so if it works when you buy it that's probably it. You won't need parts. If not they are probably out there.

Occasionally you'll see like new manual machines for a grand. Those go quick. Call right away if you see one of them.

Some knife guys will convert the head to a belt grinder. That looks really cool

They are extremely messy. I want one to grind recoil lugs and 1911 frame rails. That's it. I can buy the lugs ground and mill my rails so I haven't pulled the trigger yet.
 

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Discussion Starter · #4 ·
I've been looking at getting one for years. If you wait you can pick them up for next to nothing it better condition then the one you linked too.

The magnetic chucks cost bucks new so you want one with it

All of this stuff if made to run in a factory so if it works when you buy it that's probably it. You won't need parts. If not they are probably out there.

Occasionally you'll see like new manual machines for a grand. Those go quick. Call right away if you see one of them.

Some knife guys will convert the head to a belt grinder. That looks really cool

They are extremely messy. I want one to grind recoil lugs and 1911 frame rails. That's it. I can buy the lugs ground and mill my rails so I haven't pulled the trigger yet.
My plan is to eventually convert it to run 2x72 belts after my wallet recovers. They have tons of machines for sale up in CT. I may have to grab my trailer and take a drive up there. I saw a like new Sanford 6-12 for 1k the other day. It was gone before I could finish reading the description lol

I even tried to budget in a New tormach 6-12 auto but the 4k+ price tag spoiled that in a hurry.

Thanks for your help!
 

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Discussion Starter · #5 ·
Sorry I have nothing useful to add but I just gotta say
S***'s gettin serious
and
Your gonna need a bigger shed.

LOL
Yes sir I am trying and getting a little better with each one. I wish I didn't live in crookhaven since I'm limited to 144 square feet. Time to get the hammer out and start building before the snow comes...My fiance is going to be thrilled about this one lol
 

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I've been searching for months for a local deal on a surface grinder. I'm looking for a 6x12 and I just missed a deal on a Boyer Shultz in great shape near Locust Valley last month.

Anyway, I came across this one here: http://www.ebay.com/...=item4d36b5828a
The price is right provided it runs. My question is, is it worth it? I won't be able to test it before I buy.

The nice thing is I can still find Harig replacement parts but the price is insane!! Spindle bearings go for $350 and an oil pump is $475!

I don't even know what to look for; all I know is I need one and I will have to get a vfd to convert it to single phase power. Any help, info, tips are greatly appreciated!!
AFA 3 phase goes, you can make a phase generator using a comparable electric motor or just replace the one that's in there (better option)
 
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AFA 3 phase goes, you can make a phase generator using a comparable electric motor or just replace the one that's in there (better option)
I think he'll be better off with the VFD since it gives you variable speed with a 0-5V control signal or a digital input, which is real handy for automation.

I would want power feed for quality, and wheel dressing, I could do without a magnetic chuck for non-production tasks since a litte cerromelt will fixture your blade to a plate. I don't have a surface grinder, occasionally I grind something with my mill and the key is lubricant to control what otherwise becomes a nasty abrasive dust that is not cool on the bedways. Usually I can flycut a surface flat enough if I tram the head first, then take the cut marks out with a stone.
 

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Discussion Starter · #8 ·
I think he'll be better off with the VFD since it gives you variable speed with a 0-5V control signal or a digital input, which is real handy for automation.

I would want power feed for quality, and wheel dressing, I could do without a magnetic chuck for non-production tasks since a litte cerromelt will fixture your blade to a plate. I don't have a surface grinder, occasionally I grind something with my mill and the key is lubricant to control what otherwise becomes a nasty abrasive dust that is not cool on the bedways. Usually I can flycut a surface flat enough if I tram the head first, then take the cut marks out with a stone.
I want power feed to save my arms along with what you mentioned but it comes at a massive price and weight penalty from what I see out there. I just bought the tormach superfly fly cutter and may end up using that to get it close and the grinder for finish passes. I cant even setup a dust collector because it will be used for a lot of titanium and some zirconium.
 

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Umm...have you tried to work with titanium before? You might be in for an unpleasant surpise. A bipolar stepper and timing belt and pulley mounted to a homemade bracket and your machine's handwheel and controlled by a $30 Arduino will give you essentially a one-axis CNC grinder which would be real handy for tasks like "grind up to a line, reverse, repeat". Another option for a power feed is a copier motor- slow, powerful gearhead motor. I have one I could give you, you can pay me back by posting some more knife porn pics.
 

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Discussion Starter · #10 ·
Umm...have you tried to work with titanium before? You might be in for an unpleasant surpise. A bipolar stepper and timing belt and pulley mounted to a homemade bracket and your machine's handwheel and controlled by a $30 Arduino will give you essentially a one-axis CNC grinder which would be real handy for tasks like "grind up to a line, reverse, repeat". Another option for a power feed is a copier motor- slow, powerful gearhead motor. I have one I could give you, you can pay me back by posting some more knife porn pics.
Yes, I've been working with it. Solid carbide cutters are the only thing worth using on the stuff as its likes to smear and grab hold of dull tools. And of course it work hardens like a s.o.b. However I actually prefer it to hardened stainless blade material. My band saw won't touch the stuff unless its a brand new blade which it quickly ruins after 1 knife worth of material. I tried a piece of aluminum for the first time the other day....wow what a difference! Zirconium is the worst! Like titanium but far faster to self ignite.

I will definitely be coming to you to ask questions on how to setup auto feeds once I get a little more established. I do want to try and learn the basics first to set a foundation of practical machining knowledge if that makes sense. Crawl before I walk so to speak. Thank you for the offer. Here's a picture of my latest project for kicks anyway lol. Still a little more work to do but its coming along.
 

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