Machining Two Stroke Engine Crankcase Casting
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- Опубліковано 5 жов 2024
- Machining the lower half of the 2 stroke crankcase. Im pretty sure this casting is usable as no major casting flaws were found up to this point.
Going forward I now have some options when it comes to work holding.
Coming along nicely. Cheers, Preso.
Thanks Mark! I just noticed you have a few videos up of the drill sharpener. I need to check that out.
Quality 5÷10
Great video. I am trying to learn enough to make the Boll Aero 18 engine. I see at time 2:17 you are drilling and reaming the hole for the crankshaft. I saw a similar workflow recommended for the ML Midge but I was worried the drill would wander and the reamer would just follow. Can you let me know if you had success just drilling and reaming? I was thinking about making a D-bit to drill/ream the crankshaft hole for my work, but Id like to not over complicate things.
If you dont have one yet, get yourself a spot drill and start your hole with that. Its a short, very stout drill with no flutes and the correct start angle so your drill bit doesn't wander at the start of your hole. Do not spot past or deeper the angled tip!
You should not have a problem with drill/ream procedure. Since you are a bit unsure, get some scrap and practice the whole procedure so you can feel confidant that your not going to scrap your lil Aero Engine. Good Luck!
Looks good, should be a nice engine. What airplane are you planning on putting it in?
I have a few top wing trainers that I saved from going to the dumpster. They need a few repairs and new covering. One of these planes should work good since this engine will be somewhat low power.