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0 pointslumberjack5y ago0 comments

Why such high tech? CNCs have been around for ages and can do the job just as well.

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3 comments · 2 top-level

terramex5y ago· 1 in thread

3D metal printed pistons are ~10% lighter because they can have more sophisticated shape at the same strength. Reportedly this allows Porsche to increase RPM and get about 5% extra horsepower. It is still an experimental technology, not used in any road car. This is how they look like: https://images.hgmsites.net/hug/porsche-3d-prints-piston-for...

microcolonel5y ago

I think that there are fewer parts in a common home firearm (an AR-15, even bolt bolt action firearms) that this applies to, since the most complicated parts are in the bolt carrier group, where mass and density are generally desirable as far as I'm aware. I don't think that there are small arms parts that really benefit significantly from sintering vs machining in terms of weight savings.

warmwaffles5y ago

So CNCs are great, but there is some benefits to the powdered printing. Better oil galleries that you can not accomplish with CNC machines.

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