Belarus. - Need a crankshaft?

Honest John Back Room » Technical matters
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Sat 2 Oct 2021 22:41
Belarus. - Need a crankshaft? - focussed

www.youtube.com/watch?v=-inYCr-fV3Q

PPE flipflops must be worn when watching the video!

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Sun 3 Oct 2021 10:35
Belarus. - Need a crankshaft? - _

Like the "quality control"..

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Sun 3 Oct 2021 18:44
Belarus. - Need a crankshaft? - John F

Thanks - really interesting. What engine is it for? (It says Belarus on the packing box, but if you see the ending it looks as though the Dickensian workshop is in Pakistan.)

I'd like to see how they make a W12 crankshaft - truly a work of art.

www.pacificmotors.com/wp-content/uploads/imported/...g

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Sun 3 Oct 2021 20:18
Belarus. - Need a crankshaft? - focussed

Thanks - really interesting. What engine is it for? (It says Belarus on the packing box, but if you see the ending it looks as though the Dickensian workshop is in Pakistan.)

I'd like to see how they make a W12 crankshaft - truly a work of art.

www.pacificmotors.com/wp-content/uploads/imported/...g

It could be a cloned part for an old 3 cylinder Perkins which I think has family connections to a model of Massey Ferguson tractor. The Belarus connection is puzzling unless they copied and used that engine as well.

They look similar to these cranks ( scroll down the page)

www.mianautos.com/parts.php?currentpage=13&com...y**=1&category**=24

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Mon 4 Oct 2021 09:46
Belarus. - Need a crankshaft? - Andrew-T

<< It could be a cloned part for an old 3 cylinder Perkins which I think has family connections to a model of Massey Ferguson tractor. >>

Certainly has some connection with Perkins - I caught sight of that name cast into one of the Crankshaft webs.

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Tue 5 Oct 2021 12:12
Belarus. - Need a crankshaft? - edlithgow

Not that I have experience (used a lathe once I think, to cut threads in brass rod) but I was surprised to see so little use of lubrication/cutting fluid.

I would have thought it would prolong tool life and so save time and money.

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Tue 5 Oct 2021 16:09
Belarus. - Need a crankshaft? - John F

And I was dismayed (not surprised, as clearly a backwards place producing stuff designed about a century ago) not to see much eye protection.

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Wed 6 Oct 2021 00:52
Belarus. - Need a crankshaft? - focussed

Machining cast iron is usually done dry - no liquid coolant, but it depend on the grade and type of iron, there are dozens of different sorts.

Horrible stuff to machine, it makes a lot of carbon dust, I got filthy in my little workshop recently just milling a 6" x 4" x 1" square for a small surface plate, it gets in everywhere it shouldn't on machines and causes wear on slideways etc.

Edited by focussed on 06/10/2021 at 01:00

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Wed 6 Oct 2021 09:15
Belarus. - Need a crankshaft? - Andrew-T

Machining cast iron is usually done dry - no liquid coolant, but it depend on the grade and type of iron, there are dozens of different sorts..

I'd not thought about that - the crankshaft is clearly a casting, but I find it odd that crankshafts can be made of relatively brittle material with poor tensile strength ?

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Wed 6 Oct 2021 12:02
Belarus. - Need a crankshaft? - galileo

Machining cast iron is usually done dry - no liquid coolant, but it depend on the grade and type of iron, there are dozens of different sorts..

I'd not thought about that - the crankshaft is clearly a casting, but I find it odd that crankshafts can be made of relatively brittle material with poor tensile strength ?

Crankshafts have been made from nodular cast iron for decades. This material is not to be compared with ordinary grey cast iron, it can have double the tensile strength, elongation and impact resistance

The composition ensures that graphite forms spherical nodules instead of the flakes which make grey iron brittle. (Turbocharger turbine housings are also made from a cast iron which will contain a turbine wheel bursting from overspeed.)

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Thu 7 Oct 2021 06:10
Belarus. - Need a crankshaft? - edlithgow

Machining cast iron is usually done dry - no liquid coolant, but it depend on the grade and type of iron, there are dozens of different sorts.

Horrible stuff to machine, it makes a lot of carbon dust, I got filthy in my little workshop recently just milling a 6" x 4" x 1" square for a small surface plate, it gets in everywhere it shouldn't on machines and causes wear on slideways etc.

I suppose maybe the carbon makes it self-lubricating?

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Mon 11 Oct 2021 00:56
Belarus. - Need a crankshaft? - focussed

Yes it is self lubricating due to the free carbon as graphite in the iron.

However, modern practice on CNC machines is to use pumped coolant through the actual cutting tool, that's the white liquid that is an emulsion of water and soluble oil, because it eliminates the dust problem and washes the chips down away where they can be carried away on a conveyor.

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