bjorn Posted February 17, 2009 Report Share Posted February 17, 2009 Nothing long, since I could not find a review on this item when the purchasing I thought I would write one myself. First impression - simple cardboard box with the words "fine steel" on it, although it really is very lightweight aluminium as stated on Ebaybanned webpage. Next just some pictures from the gearbox itself... Notice the strange forging? marks at the and of the cylinder area inside the gearbox? Can anyone verify for sure what they are. As in if this gearbox is forged and then CNC-d or something else? Also what kind of strength comparison can I expect from this when compared to regular die-cast gearboxes such as G&P or G&G. In the cold? More coming later tomorrow when I should be able to get to installing Element 300% gears in it with M120 spring and other Marui M4 parts. Stay tuned, Bjorn Quote Link to post Share on other sites
DarkLite Posted February 17, 2009 Report Share Posted February 17, 2009 (edited) In all likeliness this, along with almost every other "CNC" part in Airsoft, has been machined from a rough cast. Machining from Billet is ludicrously expensive and generally not always worth it. Edited February 17, 2009 by DarkLite Quote Link to post Share on other sites
TANGO91 Posted February 18, 2009 Report Share Posted February 18, 2009 Looks good so far, looking foreward to more, but I would be really interested in some torture test, like M170 springs and such just to see if it breaks. Quote Link to post Share on other sites
bjorn Posted February 18, 2009 Author Report Share Posted February 18, 2009 Sorry for the bad image quality. Overall - everything fits in the gearbox nicely, no problem when installing, only the Element 300% gears make a lot of noise. Atm M100 spring in there, shoots 112-114m/s. Ok ROF. If anything new happens, I will post it here. Bjorn Quote Link to post Share on other sites
uscmCorps Posted February 19, 2009 Report Share Posted February 19, 2009 In all likeliness this, along with almost every other "CNC" part in Airsoft, has been machined from a rough cast. Machining from Billet is ludicrously expensive and generally not always worth it. Can't speak for other manufacturers... but any part manufactured by DYTac that is stated as being CNCed is in fact started off from Billet. I've personally seen it go from Billet to end product. Totally OT, I'm just saying that there are definite exceptions to the rule. As for this "CNC" gearbox, I'm pretty sure it started from a rough casting. Quote Link to post Share on other sites
bjorn Posted February 19, 2009 Author Report Share Posted February 19, 2009 Can't speak for other manufacturers... but any part manufactured by DYTac that is stated as being CNCed is in fact started off from Billet. I've personally seen it go from Billet to end product. Totally OT, I'm just saying that there are definite exceptions to the rule. As for this "CNC" gearbox, I'm pretty sure it started from a rough casting. Strength wise how does a rough cast compare to a billet? B. Quote Link to post Share on other sites
DesertFoxRomel Posted February 19, 2009 Report Share Posted February 19, 2009 Not as strong. Casting is the same process they use for potmetal gearboxes, and which are notorious for snapping. If they cast it out of steel, and then machine it, that would be better. 7075 aluminum is great, *same stuff they used in M16s*, but I don't know how much stronger it is compared to potmetal, as it isn't forged or presumably heat treated. Quote Link to post Share on other sites
DarkLite Posted February 19, 2009 Report Share Posted February 19, 2009 Can't speak for other manufacturers... but any part manufactured by DYTac that is stated as being CNCed is in fact started off from Billet. I've personally seen it go from Billet to end product. Totally OT, I'm just saying that there are definite exceptions to the rule. As for this "CNC" gearbox, I'm pretty sure it started from a rough casting. Fair enough, but they're an exception. Even the more expensive, reputable brands do this: Sheriff and SD, for example, CNC their slides from a casting, not billet. To be honest, in most cases it really doesn't matter. Yes, from billet is stronger, but in machined from casting is strong enough for airsoft uses 90% of the time. Quote Link to post Share on other sites
tosuzu Posted February 20, 2009 Report Share Posted February 20, 2009 What size bearing does this thing use? Quote Link to post Share on other sites
TANGO91 Posted February 20, 2009 Report Share Posted February 20, 2009 8mm bearings i believe Quote Link to post Share on other sites
bjorn Posted February 20, 2009 Author Report Share Posted February 20, 2009 8mm bearings i believe Correct! B. Quote Link to post Share on other sites
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