How it's made - Omega forged pistons - Part 2
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- Опубликовано: 19 сен 2019
- We visit Omega pistons to see the fascinating process of machining a forged 73.5mm A-Series racing piston.
Part 1 - • How it's made - Omega ...
Part 3 - • How it's made - Omega ... 
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Fun watching, being a CNC machinist and programmer on 4 axis VMC's and lathes for 10 years. Now they have the ones that would machine the entire piston in one operation. 9 axis with duel chucks opposite one another. Turning, milling, drilling, tapping, boring. Out with the complete part. Amazing. Love these guys with all the years they've dedicated to the industry. Keep up the great work!!
Woo, i love these series of how things are made. Keep it up MED Race Technologies!
Must say I really really love watching these videos! I work in inspection and don’t get in a machine shop anymore so it’s great to watch
Venda de tornos mecanicos
Great work! Only thing that I gotta say is it’s specific not pacific :-D . But pistons look great👏🏻
I'd hate to have to make a set of those out in the shed!
Keep it coming!!
great video thanx to everyone infront of camara and behind, I have always wonder how are engine pistons made, this video answer my question it's amazing to see process of a raw almenium to an awesome perfect machined PISTON!!!!!!
Thank you. You might like part three if you haven't seen it already - ruclips.net/video/K2qQ6OL6vRU/видео.html
I feel great ease knowing that my engine upgrades are made by these sweet looking men.
Would you not be confident in the parts if The men where ugly
Cool, that's like it's been rolled many times like the Cyberpunk and Starship steel.
how proud i am when i saw Proton's poster. hahaha
Interesting.. Because modern cast and forged pistons aren't actually round, they are slightly oval at the top and oval in the opposite direction at the skirt end. We are talking a few thousandths of an inch, but enough for it to be visible and measurable by a feeler gauge. Back in the early days, they are perfectly round.
Once upon a time (around the 1930's to 1950's) forged pistons weren't anything special. And were put in just about every car engine from low end Austin and Morris cars to Packards and so on. With diamond polished sides, mirror finished I might add. This was easily possible due to the aforementioned roundness.
Edit: ruclips.net/video/ieF3d_YBUh4/видео.html
For those curious about how die cast pistons were produced in quantity and polished up back before the days of CNC. Start the video at 9:55 😉
Motorcycle pistons are perfectly round, i measured it right now.
@@JK-nd7ez That is actually interesting.. Never worked on a bike myself, closest I've gotten to that type of engine is a 25cc hedge trimmer 2 stroke. Its piston was perfectly round too. But I have several V8 pistons knocking about, and they are oval top and bottom. Though only by a few thou, but enough to be seen when installed into an engine.
@@JK-nd7ez Motorcycle pistons are also oval, you will find that they tend to be round on the lands either side of the ring grooves because the thermal expansion is more even there. If you measure the skirt it should be smaller across the pin axis than on the thrust faces.
@@JK-nd7ez if a round piston is used you would have to run a lot of clearance to allow the expansion of the areas that expand the most, thus would mean a lot of rattle which is why pistons are oval, you put the bore clearance to suit the largest part of the piston which makes it quiet running, then the smaller areas of the piston can expand without seizing.
@@Omega-Phil motorcycle pistons have around 0.05 to 0.07 clearance and i repeat i measured it and they are round
I am from Indonesia, I am grateful for the knowledge you provide😀
Iya infonya keren. Sayangnya youtube di Indonesia kebanyakan isinya ga guna
3:55 - from the windooooow to the wall.....
Hi , do you guys make pistons for classic / vintage motorcycles , or would it depend if you had a forged blank that was close ,I am finding it difficult to buy anything but a JP piston JPO1032 , needs to be 3.250 + .030 with a 1.812 comp height , for a 49 Matchless G80 . great video thanks for sharing . Cheers.
Top tip: Because the RUclips algorithm no longer picks up and suggests previous / follow on parts of a series, you may want to explicitly add links in the description. For example, I was shown a link to this video (part 2) while watching something else, but now I have no obvious way to go back and view part 1. Just sayin'.
Good tip, thanks.
Exactly what just happened to me. I see that link to part 1 is in the description....nice!! 😉😉😉
When you see how much work, skill and technology there is to make a piston they seem very inexpensive.
But they ain't
@@zacharyherrington8829 yeah no. make them yourself.
@@marklowe7431 don't know what planet your on 900$ for the ones I need
@@zacharyherrington8829 $900 is great value. Lot cheaper than buying a CNC and all the time spent learning piston design. Calc your comp / quench height spend 900 and your done.
@@marklowe7431 you don't impress me i disagree with you on everything you say.say something actually intelligent besides spend money
Can I ask if you know what type of ring sets will be going on these pistons before you make each set, and whether you have to program your CNC machine around the availability of specific off the shelf or custom made rings? For example if someone in racing is being sponsored by Omega a piston and con rod maker, and that rider/driver is being sponsored by a certain piston ring maker, there has to be that consideration when planning how you make them I guess?!
Omega would make the pistons to suit the rings that the customer wants to supply if the customer doesn't want to use Omega rings. They would need the ring widths and the radial width of the rings too.
Why don't you use a newer mill-turn cnc so you are doing only 1 to 3 machining operations per piston.
May i know how you guys make the piston ovality and vertical drop? using cnc machining?
Part 3 is coming very soon and we go into detail on that...
It’s amazing to me they aren’t more expensive than they already are.
are reliant 850 pistons available?
Just for a comparison, Porsche's 4.0 has a bore of 102.70mm x stroke of 80.40mm.
I like piston you company make.
Piston you what brand name.
I whont piston fof sale in thailand
احيك من الاردن
I think you mean eccentrically not concentrically when machining the dish
heeey i see a lot the Pistons and i need Two piston's for a BSA 71 SCRAMBLER 650 .. or
700 (new piston and new measure or 750 ) .. cheers ..
You could contact Omega and ask if they have a retailer of BSA pistons. We only supply those for A-Series engines.
@@MEDEngineeringTechVideos what is A seroes bro
Are they really forged? Seems moore like stamped
Yes
Now this is very interesting I restore interesting, sometimes so called exotic engines, my pist suppler in the US is good but I would like to use UK engineering if possible do you do one engine sets or large runs
It's usually prohibitively expensive with forged pistons, sadly, as you'd need to fund the forging tool itself.
@@MEDEngineeringTechVideos hi are you connected with the company I ask because I don't recognise race teck thanks tooling in not to much of a problem for us we tooling for some very rare engines and sell to high end restorers some of these components cost over £30,000 each and a crank came be over £50,000 plus. I am in Turkey at the moment but will be back soon I will make contact then
@@kennethmoxon7337 We're the main retailer of Omega pistons for the BMC A-Series. You may be best to contact Omega direct on this one.
@@MEDEngineeringTechVideos thank you for your reply sorry I did not recognise the respected name we deal in mark specifics generally v12 and v16 units so called exotics so we will make contact direct as you say
Dishide piston not good we need dome piston give more high presure.
dished pistons are for big bore or turbo applications so that combustion chamber doesn't have to be messed with.
Turbos increase The air density.with a flat piston or in the case of a hemi engine a domed piston you would get detonation.
Hi friends any have 2stroke cylinder made RUclips I'd
Why do you want an oval?
Theres more metal in the sides of the piston around the pin bosses than the skirts. Its machined oval so it becomes round at full running temperature. Tapered small at the top, largest at the bottom for the same reason. Tricky eh!
Interesting how much taper or out of round-ness are we talking about?
Actual measurement will change as a percentage of piston size but it will be easily seen with a set of vernier calipers. Stick a properly clearanced piston into a cylinder bore top first and it will be surprisingly loose fitting as they are also given extra clearance around the ring lands as its preferable that the lands dont touch the bore in operation so piston material does not get dragged down and pinch the rings.
@@beachboardfan9544 Ovality can be anything from .008" (.2mm) up to over .040" (1mm). Some pistons don't have a normal ovality, some need an ovality on the skirt that is too much to continue around the sides and it would reduce the sides too much so the ovality is reduced as it gets towards the pin axis area. Some pistons have up to five ovalities on them. It's all to suit the thermal idiosyncrasies of each engine.
@@watsisbuttndo829 Technically the amount of metal doesn't alter the amount of expansion but it does alter the rate of expansion. If you get two 100mm discs 10mm thick, leave one solid and put a 90 mm hole in the other, when they are both at the same temperature they will both be the same size. Obviously the solid one takes longer to absorb the heat right through. The main reasons for expansion at the sides are, cooling in the block usually isn't as efficient between liners, (some blocks are Siamese and have no water between them) and also the heat generated by the pin rotation, in particular if there isn't enough clearance in the small end of the rod the pin can get very hot, this heat conducts along the side panels and into the skirt at that point. Omega recommend .0012" clearance in a small end. On pistons that have a press fit pin ie; held tight in the con rod and no circlips, they hone the pin bore out more. On some of the mini pistons where both types of pin are used, they are honed to suit the press fit pins which isn't detrimental to the fully floating version. Also the Omega pistons aren't biggest at the bottom, but they are the smallest at the top ;)
$900 each? Wow!
That's for a set of four.
It's not over anyone's head either: Cam ground as in piston isn't round
+/- 10 micron "Go/No Go" on ring grooves
Anyone can make one of these if you work for a living.. Cannot be counterfeited....
O dear Lord.... Can they????
Piston cbr 150R or gl100.?
Please comen and suskrep my canel..
To many setups on too many different machines means trouble and stacking of tolerances. Three machines and three chuckings is all that’s needed. No wonder you don’t see so many older English cars.
All them years and the snotty little git pays him peanuts