Mark V8

iTrader: (2)

Does anyone know what grade of steel is used in steel flywheels?
I'm going to have to make a one off flywheel and can't find out what grade of steel is generally used, there are plenty of tough steels out there but I assume it needs to be resistant to "picking up" or gauling where the clutch plate rubs.
Any advice welcomed
cheers
Mark

Doug

Billet not forged for strength and durability I.e workable with out cracking or shattering .





Regards Doug .

pee vee

garage 19 might be able to help on here!

fudgeee had one made by him i think!

GARETH T

im sure my mate in work used k600,,, ill ask him tomorrow and post

Mark V8

iTrader: (2)

Doug, I'm really after specific grades like EN8, EN24 etc and it will have to be from a billet for cheapness.

Cheers Gareth T, I had not thought of using K600(EN30B I think) as it is a steel that tends to get used for through hardening but it is plenty tough enough. Can you let me know how he got on?
Number 1 choice for me at the moment is P20 as it is super tough but can pick up when it's metal on metal, not that the friction material on the plate is metal . P20 can be nitrided and the surface gets glass hard to around 0.010" depth but this just adds to the expense and hassle.

Pee Vee, I did ask Garage 19 a while ago and at the time he did not know what the grade was. That might of changed now with any luck.

keep the ideas coming

Mark

GARETH T

well he made the flywheel a few years ago, and i know its still going strong

GARETH T

BTTT,,, ive had a chat too my friend,, and he did make it out of k600, but he also said he made another from EN8 and that was fine

Anonymous

Ive seen them in EN8 before and they have stayed in one piece

ian sibbert

We have made them out of EN24T...a little more expensive but we've never had any trouble...

paul16v

En8 does wear quite easily over time en24 is alot tougher steel, used to make alot of electric motor shafts from en8 steel and when i have machined flywheels in the past they are made out of alot tougher stuff so i would say en24 would be a safe bet.

markk

iTrader: (2)

en24t is mine

Garage19

Mark,

Finally getting that V8 conversion sorted then?

Did plenty of research into this before i got the first batch of flywheels made as i too was worried about them picking up.

Most steel flywheels on the market are made from EN8. For example all the ones you can find in the burton catalogue are, even the integral ring gear ones.

So EN8 is perfectly usable.

EN24 is slightly better, but is about £15 extra per billet.

Mark V8

iTrader: (2)

Cheers chaps, EN8 seems a bit soft really so it's a toss up between P20 and EN24.
V8 conversion is going to take a while I have far to much DIY on the go to spend much time on it at the moment apart from doing a few AutoCad drawings of the parts I need in the evenings.

Mark