Bugatti straight 8 cylinder with blower, design, 3D printed molds, castings , machining, assembly

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michelko

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Hi lules
do you use a hardened shaft? i belive the needle bearing will wear an unhardend shaft quickly.

Regards Michael
 

awake

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Camshaft project , there are a double overhead camshaft
The square profile on each cam has the function of facilitating the timing, the hole is for spring pin
The shaft is 8 mm supported by 5 needle bearings


View attachment 117412
I would think you would need the gear teeth to go all the way around ...

:):):)
 

Foketry

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Those are great looking cams. Good idea with the square👌.
I used a kind of fork that matched the lobe of the cams to adjust the cams. Your solution looks way more accurate.
How do you machine the cams? Any pictures from the setup?

Regards Michael
Hi Michael
here is my setup, Now I am milling the intake cams
They are obtained from ground bar, C45 steel
The most suitable steel would be 115CrV3, which I purchase from GHW modelbau in Germany, in Italy I cannot buy small quantities of this steel, only tons , this steel is easy to harden with high hardness in water

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Foketry

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the head is made up of 3 parts, 2 side boxes carrying camshafts and one central part with the spark plugs, valves and combustion chambers
Also the head of the original engine is in 3 parts

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Foketry

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Camshaft cover assembled with only 3 brackets of 5, 2 are casting waste, to be redone
Everything will have to be sandblasted and finished

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