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Sunnen Honing Machine
August 12, 2011
8:29 PM
JohnLawson
Tacoma, WA
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I have a Sunnen MBB1660 hand stroker with lots of extra tools and fixtures, many mandrels and stones and at least one exdxxternal hone and a 5" chuck.

These are going for $3900 for the bare machine. I need space, so I'll sell the complete setup for $3500 cash

Must be picked up in Tacoma, WA.

Machine has had very little use and is like new.

(253) 474 5465

Here's your chance, Tyler. Split a ten-thousandth and get a finish of 3-5 micro inches.

August 12, 2011
11:41 PM
Tyler
Seattle, WA
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Sold! I've been looking for one on Ebay for over a year and haven't found one locally. I'll give you a call tomorrow or Sunday. I'm in Suncadia right now but we are heading home tomorrow. It might take me a week or two to organize moving it, but I can give you the cash this week. What does it weigh? About 600 lbs?

The nice thing is you're welcome to come and use it anytime you need it!

T

NOTE: I work full time and I'm attending college full time as well. So if it takes me a few days to respond, please don't take it personally. If it's urgent please send me a Private Message.
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August 13, 2011
6:33 PM
Alexander m
Montreal
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If I'm not mistaken the honing machine is used to polish the inside of a engine cylinders. Tyler, I'm not sure how often you hone engine blocks, but $3500 seems like a lot for what it does couldn't a $20 power drill honing machine get you by. Sorry if I'm imposing my opinion but that amount could get you a really good lathe, mill, surface grinder or a combinations of those and I don't see the real value of that machine. However if you are refurbishing dozens of engines then by all means.                 

The best laid schemes on mill and lathe, Go often askew, -Bobby Burns, If he was a machinist.  
August 13, 2011
9:43 PM
Tyler
Seattle, WA
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I understand your concerns Alex, but I'm one of those guys who doesn't like regrets. And I know I would eventually regret passing on this deal. For one thing, I know I'll have a need for the machine for at least two projects in the near future … whenever I actually find time to work in the shop again. So while I won't be using it regularly, I will have a need for the honing machine occasionally. I've used the machine on one project already (several months ago when I was trying to get my flame eater to run) and I was amazed at how well the machine works. It's definitely the cadillac approach to honing a cylinder (as apposed to a wooden dowel wrapped in sand paper, or a brass lap, etc). And to put things in perspective, I easily spent over 100 hours on the engine, but at least half of that time was spent fussing with the fit of the pistons to the cylinder. I think I remade them 4 or 5 times before finally asking John for the use of his Sunnen.

I wasted weeks agonizing over that engine when I could have spent 15 minutes at the honing machine (that's literally how quick it was to hone the cylinder to a glass-like finish) and had a working engine. So I asked myself that age-old question. What's my time worth? And better yet, what's my frustration level worth? I'm not a highly skilled machinist. I'm an enthusiast with hack-level skills. I'm willing to pay for excellent tools when I think they might give me an edge (even if that edge an illusion – I know a lot of machinists that produce excellent work with cheap chinese tools – but I need all the help I can get). And I'm even more willing to pay for tools when they save me time or make a task easier to perform.

John's machine is literally like-new despite being a 1977 model. He said that he's only used the machine on a dozen or so projects in all these years. The price for the bare-bones honing machine in 1977 with no accessories was about $3,000. That translates into about $11k in todays dollars. I found a new machine online that was a scratch-and-dent model for $10k – but it was just the machine, no accessories. 

Now, would I pay $10k for a new honing machine? Absolutely not. I could never justify that. I wouldn't even pay $3500 for a like-new machine like Johns. So for me the price was still a stretch until I remembered how much extra tooling he had for the machine. He easily has 5k in tooling and stones. He has an almost complete set of arbors (one seems to be missing, but I bet we find it when we move the machine) and a full set of stones for both outside and inside honing. Some of the more common sizes he has duplicates or triplicates of. And only a few sizes have even a hint of oil on them (supporting the claim that he's only used the machine 10 or 12 times). He also has most of the major accessories that you can buy for the machine. So to equip a shop with the machine and tooling he's got would cost a lot of capitol. 

One more reason I couldn't pass up the machine is because I know the machine's history. I've personally used the machine and can attest to the shape that it's in (it's literally like new, even though it's from the 70's) … and having used the machine I can also say that once you've used a quality honing machine you'll never want to fuss with a copper lap or a $16 break cylinder hone from Shucks. 

And one last reason I couldn't pass it up. I could easily sell it anytime for at least what I'm paying for it. Granted, it might take some time to find a buyer – it's a pretty specialized machine. But I would never loose money on it. As far as I can see the only downside to the purchase is tying my money up in a capitol expense like this for however long I keep it. But that's no different than any other machine I've purchased. The difference here is, I'm not paying the "new" price. I'm paying used price on a machine that will retain it's value – assuming I don't damage it in some way. 

So anyway, no I won't use the machine regularly like I use (or used to use when I had time) my lathe, but when you need something honed and you've used a Sunnen, it's hard to think of doing it any other way. So consider me crazy if you must, but it think it's a great deal. And since John's a personal friend, I'm glad I'll be keeping the machine "in the family" so to speak. Sorry for the long reply. Sometimes being able to type fast is a curse. 

NOTE: I work full time and I'm attending college full time as well. So if it takes me a few days to respond, please don't take it personally. If it's urgent please send me a Private Message.
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August 14, 2011
12:01 AM
Alexander m
Montreal
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That is indeed a great machine and at real bargain, but I don't think that it is the right bargain. I'm sorry to say this but it seams to be a bite of a waist to buy a machine with the intent of only using it occasionally. There are ways to get around this, if all your ding is to make small engines then a large reamer may be sufficient alternatively you could use a tool post grinder with a small wheel about 3/4 the hole size to preform an internal surface grind in steel. $3500 is about the price of my lathe with some of the tooling and I use it almost none stop, but for the rare operations it may be more practical to give it to a professional machine shop.

The best laid schemes on mill and lathe, Go often askew, -Bobby Burns, If he was a machinist.  
August 14, 2011
8:49 AM
JohnLawson
Tacoma, WA
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Well, Tyler came over and bought it last night. He used it to finish his flame eater when none of what you mentioned produced a bore smooth and tight fitting enough to allow operation.

You failed to mention lapping, which is much more tedious and hit or miss than honing.

In the past, all commercially produced model airplane engines were finished using a Sunnen honing machine.

All bullet swaging dies commercially produced are finished with a Sunnen honing machine.

Some gunsmiths use a Sunnen to fit pistol barrels to bushings and to modify revolver cylinder chambers.

I'm sure that in the future, Ty will write up his honing projects so that you will understand the merits of honing over other methods of finishing.

August 14, 2011
8:58 AM
JohnLawson
Tacoma, WA
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Tyler, that "missing" arbor is still chucked up in the machine, right where you left it after honing your flame eater bore.

I also forgot t mention that the Sunnen is equipped with a large range of EXTERNAL hones. There is no way that any machinist living can produce an even external surfaces of 3-5 micro inches in a lathe without using an external hone.

It all depends on what you want to turn out. Model engines aren't the only things that can be finished in the Sunnen. Bushings and bearings used in the shop come to mind; none of the alternative methods of finishing can match honing.

At 81, I still learn new things every day. You can learn a great many new things by following this forum, if you decide to keep an open mind. And, those of us who grew up wearing hand-me-down, patched clothes often have a hard time realizing that some people can afford things that we can only dream about. Now, at the end of my life, I'm finally able to build some guns for myself that I have built for others in years past…

August 14, 2011
9:32 AM
GarethBell
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JohnLawson said:

Tyler, that "missing" arbor is still chucked up in the machine, right where you left it after honing your flame eater bore.

Hahaha.

Nice to see you posting John.

Stand back.
August 15, 2011
10:16 PM
sammy
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January 13, 2011
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Tyler, if you haven't picked it up yet, I can give you a hand.

Sammy

August 16, 2011
6:13 PM
JohnLawson
Tacoma, WA
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Tyler, you will need to determine the oil capacity and bring 5 gallon containers and pick up a drill operated pump with pickup and delivery hoses; the one I have is useless.

Spent today cleaning up around the Sunnen so it will be easier to remove it. (Groan.) Getting there.

Boy, can I ever use the floor space!

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