*reposted from Airsoft Mechanics where I also visit*
Wallace and Kumi were happy to show me their upcoming Revolution gearbox. I was asked not to spill the beans before they made proper press releases through various means. A lot has already been said and man their released studio shots are a lot nicer than what I could take at the show so I've not got much new to say. Still, I got to handle the parts directly and see what they were up to.
SchAWinggg!
Overall a very interesting gearbox. SystemA is using a similar piston to their PTW line of AEGs if not exactly the same one. I can't recall how many teeth the PTWs have, but if you've got one open take a look.
Anyhow, SystemA is using very similar avionics to their PTW. Looking through the sector to detect sector gear orientation to execute counted burst and semi. One thing I do like is that their FET board is very well heatsunk to a heavy strip of aluminum which is closely clamped to cast aluminum gearbox. Chuck in a bit of heat transfer goo and their Revolution gearboxes could have better heatsinking than their PTWs.
The gears look to be nicely milled. On closer inspection, the teeth look to have nice involute profiles, but without magnification and proper gauging saying much more would be uninformed hand waving. I forgot my hardness tester at home (dammit left it in the other jacket) so I couldn't measure hardness. Gear flanks were smooth though.
It looks like they've planned to accurately engage the motor bushing instead of letting it rattle around in loose fashion. The grooved motor hole makes me think that they've got a shoulder ring machined into the bearing motor bushing so when the gearbox is closed, it registers the bushing radially and axially. I suspect that the motor will directly mount to this gearbox instead of through a removable plastic grip a la TM.
Overall, the gearbox looks to be a very nice aluminum casting. No heavy flash and the sides close up nice and coplanar.