Author Topic: Need some input on buying a Stamford Generator Head  (Read 1159 times)

Randybee1

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Need some input on buying a Stamford Generator Head
« on: December 05, 2020, 10:29:51 PM »
Hey guys, I have a Kubota D905 engine that I plan to run at 1800 rpm and would like to direct drive a "good" generator head. I'm looking at this Stamford (now Cummings) 8.2 Kw head.
Any Pros/cons with this set up? I actually have 3 ST heads I bought about 10 years ago but I'm thinking this head is way better? Any input appreciated

Randy

https://centralgagenerator.com/product/164-8-2kw-double-bearing/

32 coupe

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Re: Need some input on buying a Stamford Generator Head
« Reply #1 on: December 06, 2020, 04:55:22 AM »

Yes, those are fine heads.
I have done the same thing with the smaller Mitsubishi engines.

If you search for some of my past posts there are several pics of a build or
two you might get some ideas from.

Gary


Metro 6/1 turning a ST 7.5 KW gen head
Changfa 1115 turning a ST 15 KW gen head
Ashwamegh 2/25
John Deere 110 TBL
New Holland TC 30

"I was sitting here reading this thinking what an idiot you are until I realized it was one of my earlier posts !"

32 coupe

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Re: Need some input on buying a Stamford Generator Head
« Reply #2 on: December 06, 2020, 04:58:18 AM »

To add, I machined a hub for.the engine side and used a Lovejoy coupler.
Look on ebay and you can find the couplers.for.a reasonable price.
I also used a Honda radiator and a temp controlled fan and it works great.


Metro 6/1 turning a ST 7.5 KW gen head
Changfa 1115 turning a ST 15 KW gen head
Ashwamegh 2/25
John Deere 110 TBL
New Holland TC 30

"I was sitting here reading this thinking what an idiot you are until I realized it was one of my earlier posts !"

32 coupe

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Re: Need some input on buying a Stamford Generator Head
« Reply #3 on: December 06, 2020, 05:09:56 AM »

I forgot to mention the mounting bracket for the stamford clone heads will flex quite a bit
and I had to add a "brace" from the engine to.tje gen head to keep the coupler spiders from
self destructing.

Metro 6/1 turning a ST 7.5 KW gen head
Changfa 1115 turning a ST 15 KW gen head
Ashwamegh 2/25
John Deere 110 TBL
New Holland TC 30

"I was sitting here reading this thinking what an idiot you are until I realized it was one of my earlier posts !"

Randybee1

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Re: Need some input on buying a Stamford Generator Head
« Reply #4 on: December 06, 2020, 10:24:14 AM »
Thanks Gary, Appreciate the feedback. I already have the hub mounted and a LoveJoy just setting around waiting for some Love from a Gen head. What/how/why does the Stamford head flex? Are they not mounted to the frame like an ST head would be?

Randy

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Re: Need some input on buying a Stamford Generator Head
« Reply #5 on: December 06, 2020, 02:28:11 PM »
The clone head has a bent metal "bracket" that you bolt it
in place with. It will flex abit. I chewed up a few spiders before
I figured it out.
Look for my earlier posts and I think the pics are easier to see.
I used a piece of 3/8" threaded rod. There is a hole at the top
of the clone head it will fit thru and I made a simple bracket that
bolted to the back of the engine then adjust as needed.

Gary

Metro 6/1 turning a ST 7.5 KW gen head
Changfa 1115 turning a ST 15 KW gen head
Ashwamegh 2/25
John Deere 110 TBL
New Holland TC 30

"I was sitting here reading this thinking what an idiot you are until I realized it was one of my earlier posts !"

32 coupe

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Re: Need some input on buying a Stamford Generator Head
« Reply #6 on: December 06, 2020, 02:40:38 PM »

I have 2 ST heads I purchased about 15 years ago and they are fine. Good solid units.
However, I also have 2 purchased within the last few years and they are junk.
They won't deliver proper voltage without an internal regulator. And then they raise hell
with an unbalanced load. Some of the later units had aluminum windings.
They are fine for 120 or 240 ONLY, but not both.

With that said, it's true that the clone heads have a much better sign wave but if your
loads are not  critical your early st heads may be fine.

Gary


Metro 6/1 turning a ST 7.5 KW gen head
Changfa 1115 turning a ST 15 KW gen head
Ashwamegh 2/25
John Deere 110 TBL
New Holland TC 30

"I was sitting here reading this thinking what an idiot you are until I realized it was one of my earlier posts !"

Randybee1

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Re: Need some input on buying a Stamford Generator Head
« Reply #7 on: December 06, 2020, 06:30:55 PM »
Thanks Gary, I'll make a bracket when I get the head. Critical loads?.. Kids that keep getting more and more sophisticated gaming software but the real critical load is my wife!... can't have the TV go on and off like it does with my 10hp Honda gasser.

Randy

hwew

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Re: Need some input on buying a Stamford Generator Head
« Reply #8 on: December 25, 2020, 03:51:05 PM »
Randy, there are different flywheels for the D905. Is yours a D905BG? The D905BG has a larger diameter flywheel that is used for 1800 rpm generators. The smaller diameter flywheels are best for higher operating speeds. If yours is a BG series and you have the matching housing, it would be easy to mate it to a direct drive single bearing SAE setup.

Here is the topic on the direct drive build I did years ago. http://www.microcogen.info/index.php?topic=1743.0
« Last Edit: December 25, 2020, 08:49:52 PM by hwew »

Randybee1

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Re: Need some input on buying a Stamford Generator Head
« Reply #9 on: December 26, 2020, 12:11:07 AM »
It has the big flywheel. I got this maybe 10 years ago. The engine runs beautifully but the gen head on it was shot. It was set up to run at 1800 rpm. It's next in line after I finish Rev3 of the Cat build. All I need for the D905 is the Gen head. I have the stub shaft already mounted and a Love Joy coupler just waiting for some love from a gen head.

hwew

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Re: Need some input on buying a Stamford Generator Head
« Reply #10 on: December 26, 2020, 01:07:18 AM »
Did it come with a single bearing head? If it did I would imagine it came with the proper housing also.
If you have the correct correct housing and flywheel why not use a single bearing head directly mounted to the housing. Iím not a 100% sure but I think they use a SAE 5 housing with an SAE 6.5 drive plate.

Central Georgia Generator sells them and they have all the info and most likely all the parts to help build a nice compact generator. I found single bearing generator heads are the simplest way to go. Much less to go wrong. No worries of chewing up love joy spiders, cracking mounts or alignment issues. ;) Itís nothing to mount a generator head on that Kubota setup.

https://centralgagenerator.com/product/8-2-kw-single-bearing/

Iím not trying to twist your arm :) just sharing what Iíve experienced.

If you might be interested in finding more out about a single bearing setup ask for Tom Osborne, he knows his stuff. Great guy. He is one of our vendors on microcogen and been helping our members for over 10 years. Let him know your a member of microcogen and listerengine.

Henry
« Last Edit: December 26, 2020, 03:44:00 AM by hwew »

Randybee1

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Re: Need some input on buying a Stamford Generator Head
« Reply #11 on: December 26, 2020, 12:26:35 PM »
Thanks Henry, A single bearing head never crossed my mind. When the time comes (hopefully in a month or 2) I'll look into it more. I already have the stub shaft mounted but it does seem like it would be easier to just direct bolt the gen head to the engine. BTW, come to think of it the original gen head was a direct bolt on so single bearing is making more sense.

I've had these engines/ST heads for over 10 years now and am finally getting around to doing something with them. I bought a Redstone from John F, built an I-beam platform for it and put an ST on it but never hooked anything up. I just wrapped it up and put in storage. I did the same thing for the Listeroid I bought from George @Uttepower. I'm finally to the point in my life that I can start working on these. So much to do though. I still have to reassemble  my '73 Ford F100 and rebuild the transmission on my '74 ford Econoline and lets not forget about my '72 Vega Wagon that I want to restore to its original condition (I'll be keeping the original 4 cyl engine). Oh.. and then there's the 11115 Laidong and the '86 Turbo Diesel Jetta.

Randy

hwew

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Re: Need some input on buying a Stamford Generator Head
« Reply #12 on: December 26, 2020, 01:37:16 PM »
Randy, if you able, single bearing is the way to go.

Sounds like you have some good projects coming up. Iím working on a 1988 Ford F-150 with a 4.9, 5 speed. Only 69,000 miles. Converting the ignition system to A Dura Spark ll distributor to trigger an MSD 6AL controller. The fuel injection system is being converted to Holleyís 2300 Snipper EFI system.
Got tired messing with the OEM equipment. I hope to have it running soon.

1972 Chevy Vega Wagon, Nice! The last year when they looked good. They are starting to become collectors. A person down the road has a yellow one. It looks very nice.

hwew

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Re: Need some input on buying a Stamford Generator Head
« Reply #13 on: December 26, 2020, 02:01:02 PM »
The larger diameter flywheel is the one designed for 1800 rpm generator use.
The smaller diameter is for higher rpm use.
« Last Edit: December 26, 2020, 02:03:18 PM by hwew »

hwew

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Re: Need some input on buying a Stamford Generator Head
« Reply #14 on: December 26, 2020, 02:11:34 PM »
The Bell Housing one the left is used with the larger diameter flywheel.

The one on the right is for the smaller diameter flywheel. Itís deeper than the one on the left.