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Nikhil.. I have Sieg C6 lathe. Make sure that there is no slack and impurities in the spindle that it can give measurement errors on the test bar. Spindle bearings should be cleaned and greased with bearing grease every 5 years if there is no abnormal wear or noise. Abnormal wear or noises...

Emers.. I spend 2,5 year to complete the Stuart triple expansion steam engine with the manual tools and jiggs etc. 😊 Not a new beginner project as this engine is the most complex and dificult to machine, many machinists give up part way through construction so part completed models are...

minh-thanh It works well if you produce a camshaft as I described in a previous post instead of a camshaft grinder because it is easier to make a camshaft whether you use these methods: Edgar Westbury's, method: Use the lathe to make curved side camlobe. As described in Edgar Westbury's...

Found the picture of 2 difference MMB .35 INLINE , information not available..

Hello old mate!,.. when in the period the engine was produced? :)

I saw this for a lot of year since, brand unknown. Very rare, near impossible to get info from internet.

C_Mario Same here I did not know about this company CAD-Modellthechnik-Jung until I came across what you wrote about the V2 engine, so I discovered everything was not complete in the drawing and description. For beginners, it is best to ask the experienced what is easiest to make a 4 stroke...

Andrew,.. But you already tried o_O all 6 cam shafts in same engine as in post #25 where you wrote here: "Mechanicboy, they have very limited info on the cam angles, It has taken me 6 different cam grinds to get close to getting one to run correctly, and I am still working on it Cheers Andrew...

c_mario and all folks... Here is the instruction from CAD + Modelltechnik-Jung ...😩 "Nockenwelle Die Nockenwelle wird aus einem Stück mit anschließender Härtung gefertigt. Dazu die Nockenwelle in einem Härteofen, bei 900 °C, ca. 10 min lang erhitzen und anschließend in Öl abschrecken. Auf ein...

Exactly, I messed with the letter in the order, .. It should be TDC = Top dead center :p I has edited to correct text..

Mis-wrote the text.. 10 degree before TDC begins intake valve to open and 20 degree after TDC begins exhaust to close.

It looks good, .. you have to try it until you see that not a lot of fuelmix is spit out of the carburetor since it is not economical when the unused fuel is throwed out of the engine.

c_mario 131 degree are a bit too much, it means 131 x 2 = 262 degree in valve timing when I am thinking the fuel mix is blowing out of carburettor. For a normal high speed engine is set to 250 degree for intake and 255 degree for exhaust and the overlap is 30 degree with 10 degree before TDC...

Minh-Thanh.. The main problem: Where is the center of point to set radius 11 mm to create cam profile. 4 mm distance is not easy to set point to create camlobe. And where is the whole angle on the camlobe? See at the drawings who are marked with green. There is not timing diagram to show. It...

You can use Bob Shore's method of milling the camshaft: Mill the first flank and then turn slow the indexing head 240 degrees while continuing to mill the base circle until you stop 240 degrees and mill the last flank. To turn 240 degrees using the indexing head you need 18 holes disc. 26 turns...

Yes, I can't see where is the angle of the camlobe on the drawings as you showed. Hence it's so difficult to make the correct camlobe without degree of camlobe to open/shut the valve in right timing. See at this picture as you can see this lift periode is 120 degree on both camlobe, this is...

Exhaust Cam Cylinder 1 0 Degrees, Inlet Cam Cylinder 1 114 Degrees Exhaust cam Cylinder 2 135 Degrees, Inlet Cam Cylinder 2 249 Degrees ??? Do you have the plan of the camshaft and camlobe in degree to show?

This is normal when you get a little pulsating pressure in the carburettor during idling due to overlap, but do not throw out the mixture of the carburettor at higher speeds. It is the gas velocity that must be high enough until the mixture is not forced out of the cylinder after BDC before the...

It spits a mist of fuel mixture out of the carburetor = too high overlap or too late closing of intake valve in valve timing. You will probably need to make a new camshaft with the right timing.

I have already installed in model steam tugboat and automatic boiler water level control system with phototransistor has worked just as well since 2016. I have not experienced crushing of glass tubes. Crushing of the level glass tube can occur if you tighten the nut too hard or do not check that...