cam drawing and the first 2 milled cams, before hardening
Bugatti straight 8 cylinder with blower, design, 3D printed molds, castings , machining, assembly
- Thread starter Foketry
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Help Support Home Model Engine Machinist Forum:
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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
- Joined
- May 3, 2012
- Messages
- 105
- Reaction score
- 28
Hi lules
do you use a hardened shaft? i belive the needle bearing will wear an unhardend shaft quickly.
Regards Michael
do you use a hardened shaft? i belive the needle bearing will wear an unhardend shaft quickly.
Regards Michael
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
I would think you would need the gear teeth to go all the way around ...
yes, correct, better to have all teeth around
In the end the result should be this , but with all the teeth around
the camshafts are almost complete, the timing is missing, it will be done in the end
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
Also the head of the original engine is in 3 parts
my plastic model painted and smoothed and aluminum casting
After milling the first check with camshaft
on the left the central part of the head with the seats for the spark plugs and the water chamber for cooling
on the left the central part of the head with the seats for the spark plugs and the water chamber for cooling
Assembly test
Small progress after 2 weeks of vacation :
Bushing cap for camshaft
Bushing cap for camshaft
Assembled caps bushes
The original engine, here I can see the camshaft cover and the fixing brackets
Drawing of fixing bracket to be 3D printed to make the casting mold
Camshaft cover assembled with only 3 brackets of 5, 2 are casting waste, to be redone
Everything will have to be sandblasted and finished
Everything will have to be sandblasted and finished
head and overhead valves
it is the first time that I build an engine with overhead valves and I do a first test with a single valve
it is the first time that I build an engine with overhead valves and I do a first test with a single valve
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