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Babbitt

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molinegb

11-10-2023 05:33:49

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Who does babbitting of connecting rods? Inserts are worn out so rods would have to be poured. Not wanting to spend a fortune for 4 rods.

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molinegb

11-12-2023 05:12:03

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Re: Babbitt in reply to molinegb, 11-10-2023 05:33:49

Shells or insert is what I need. Throw is 3.010 wide and 2.125. Rod 2.250

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4wdtom

11-12-2023 04:49:52

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Re: Babbitt in reply to molinegb, 11-10-2023 05:33:49

For anyone looking to buy babbitt I just bought a bar from RotoMetals and it was a lot less than McMaster Carr. Came in a few days and seems good although I haven't used it yet. They have quite a few different alloys of babbitt so you need to decide which you need/want.

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Mike(NEOhio)

11-11-2023 13:30:07

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Re: Babbitt in reply to molinegb, 11-10-2023 05:33:49

I'll add a little more info. For engine bearings it's grade 1 babbitt. 91% tin, 4.5% copper and 4.5% antimony. Got this from the JD collector center. I bought a 5 pound ingot, $105 from Victory White Metals in Cleveland and I'll probably use a bit more than a pound. I made up some molds when at my old job. A mandrel and pouring ring for the mains and two-sided one for the rods. Can pour both sides at once. Made pressing tools and a puller for the sleeve on the blind bearing.

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Richard G.

11-12-2023 06:40:29

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Re: Babbitt in reply to Mike(NEOhio), 11-11-2023 13:30:07

Is that a JD H main bearing?

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Mike(NEOhio)

11-12-2023 10:31:16

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Re: Babbitt in reply to Richard G., 11-12-2023 06:40:29

It's the right side main. The H has the clutch/pulley on the camshaft. All the others it's on the crankshaft. I made a puller to extract the steel sleeve but used the bolt to push against the bottom of the cup and you can see the result. I found another housing at a show and this time used a cross plate and pipe to press against the thick edge of the housing. One of the sleeves has the babbitt cleaned out, the other is as it was pulled.

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Richard G.

11-12-2023 12:14:51

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Re: Babbitt in reply to Mike(NEOhio), 11-12-2023 10:31:16

I have a new right hand main bearing for my 41 H.
Are they machined to standard for the bearing?
A friend is letting me have it and I have not seen it yet.
Thanks.

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Mike(NEOhio)

11-12-2023 14:28:42

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Re: Babbitt in reply to Richard G., 11-12-2023 12:14:51

When they were current the replacement mains were on an exchange basis. I guess they thought the cranks would never wear. Mine was bad on the left side getting progressively less left to right including the rods and the crank had some scoring. I had it ground at a local shop. Told the guy only grind enough to clean them up and not worry about the size, I would machine to fit. The worst only needed .005 to .010 but he took them down over 020 and matched the mains and rods. And he didn't duplicate the radius in the corners. This place builds high end competition engines. I was a little disappointed but it will work.

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Richard G.

11-13-2023 05:29:26

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Re: Babbitt in reply to Mike(NEOhio), 11-12-2023 14:28:42

Thanks Mike.
I am hoping to just be able to slide the new bearing on.
I replaced the crank about 20 years ago with a rebuilt one.
It was built back up to standard.
The old one had a bit of wobble to it probably because someone let the flywheel hit a tree at some point.
Put new rebuilt rods in with the rebuilt crank.
Thanks again.

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Mike(NEOhio)

11-13-2023 13:27:08

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Re: Babbitt in reply to Richard G., 11-13-2023 05:29:26

You should be able to just take the nuts off and work it away from the case. The oil is supplied from a hole in the case and the line from the pump and the fitting is on the inside so there's no disconnecting of the oil line. The oil flows around the bottom stud and up through a passage drilled through the rib. Make sure that is clear on your new bearing.

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Richard G.

11-14-2023 05:10:06

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Re: Babbitt in reply to Mike(NEOhio), 11-13-2023 13:27:08

Thank you so much Mike.

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John Garner

11-11-2023 08:54:27

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Re: Babbitt in reply to molinegb, 11-10-2023 05:33:49

It's worth noting that there are several different alloys of Babbitt, and their mechanical properties differ. It's important when Babbitting to choose an alloy appropriate for the end use.

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caterpillar guy

11-11-2023 05:13:34

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Re: Babbitt in reply to molinegb, 11-10-2023 05:33:49

With Babbitt being so soft why would it be so big a deal. You can shave off extra sprue with a knife to get it closer to size then machine from there. I would think just from what little I know of machining that if you were to form it a bit smaller than the throws of the crank you could also machine it so they would be true and straight with the crank when installed. IT would also allow for a bit of in accuracy of the centering in the rod with the Babbitt. Since the shavings would be able to be melted down for more use later it would not be a total waste of material. Much like molding lead for jobs. Since most molds have a seam in them from the halves you get sprue which can be shaved off with a knife before most machining has to be done.

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Gary Reif

11-10-2023 17:36:19

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Re: Babbitt in reply to molinegb, 11-10-2023 05:33:49

I worked in a shop several years ago that had equipment to pour and rebore connecting rods it was a neat experience. We had a dedicated machine to set them up in to get the proper center to center distance and bore them parallel to the wristpin bore. I got to pour and rebore several sets of LA Case rods.

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Hemmjo

11-10-2023 15:39:10

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Re: Babbitt in reply to molinegb, 11-10-2023 05:33:49

I have never worked with babbit, but I have done lots of foundry work, brass and aluminum casting. Also lead sinkers and bullets.

Can you make a mold and cast babbit inserts instead of casting them directly into the rod?

If would take some machine work to make a good mold and perhaps finish the bearings after casting.

Just curious.

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Mike(NEOhio)

11-11-2023 04:47:38

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Re: Babbitt in reply to Hemmjo, 11-10-2023 15:39:10

The babbitt has to bind to the surface which has been tinned first. Also needs to be heated so the babbitt does not cool too quickly. Not an expert here but done some reading up on the process.

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molinegb

11-10-2023 14:58:30

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Re: Babbitt in reply to molinegb, 11-10-2023 05:33:49

Located in Canada so not so easy. Does one rod have to be shipped as example? Be easier if could find inserts/shells and could be poured here.

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Butch(OH)

11-10-2023 14:15:21

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Re: Babbitt in reply to molinegb, 11-10-2023 05:33:49

I third Hart's in Cecil Ohio. They have done several jobs for me including babbit and they are first rate

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560Dennis

11-10-2023 13:47:51

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Re: Babbitt in reply to molinegb, 11-10-2023 05:33:49

Harts Machine did my connecting rods for my Fordson and did my friends Cushman scooter. I highly recommend them .
Heres the link Link

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Mark-Ia

11-10-2023 11:52:30

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Re: Babbitt in reply to molinegb, 11-10-2023 05:33:49

Paul's Rod and Bearing in Parkville Mo.816-587-4747

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Richard G.

11-10-2023 10:07:08

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Re: Babbitt in reply to molinegb, 11-10-2023 05:33:49

I have poured a bunch of Model T main bearings.
Never done rods though.

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1948CaseVAI

11-10-2023 08:50:43

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Re: Babbitt in reply to molinegb, 11-10-2023 05:33:49

Keith Rucker of Vintage Machinery.org has many youtube videos of babbitt pours. I don't recall any connecting rods though but worth watching anyway.

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BarnyardEngineering

11-10-2023 07:12:30

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Re: Babbitt in reply to molinegb, 11-10-2023 05:33:49

Turn Wright Machine Shop has some pretty informative videos on pouring and working with babbitt on his Youtube channe.

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Mike(NEOhio)

11-10-2023 05:40:55

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Re: Babbitt in reply to molinegb, 11-10-2023 05:33:49

Hart's Machine service in Cecil, Oh does it. There are others. I'm going to pour my H rods and mains soon. Some say I'm crazy to try but it's something I want to do.

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Loosehandle

11-10-2023 07:32:38

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Re: Babbitt in reply to Mike(NEOhio), 11-10-2023 05:40:55

I've poured a Little Giant power hammer clutch pulley bearing, bored it afterwards works good.

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RCP

11-10-2023 06:34:51

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Re: Babbitt in reply to Mike(NEOhio), 11-10-2023 05:40:55

Mike

If you could figure out a way to spin the parts on the axis of the bore, I think you would get better results.

Rich

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Steve in VA

11-10-2023 05:47:40

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Re: Babbitt in reply to Mike(NEOhio), 11-10-2023 05:40:55

Want to do is why I do so much myself. Please let us know how it goes.

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