Quote:
Originally Posted by lurkingknight
forum ate my post yesterday, but AoE correction is not about making the sector pickup meet the piston pickup at 12:00. It's about creating the situation where the two meet with as much surface area contact as possible. Your final resting place could be 12:00 but that depends on the gearbox shell and all other components as tolerances are all slightly different. Too much of an angle can drive the angled tooth of the sector into the face of the pickup that will eventually shear the back of the piston off. At least in my mind's eye.
Also I agree with wind_comm that you may need to leave more of the 2nd and 3rd teeth on while just completely removing the 1st normal tooth. You just want enough room for the sector to clear the rack. I run m110s in my guns and have not seen any sort of wear that would indicate the setup won't work.
Also you mentioned polycarb pistons in your other thread. POLYCARB IS CLEAR it's a material that's meant to take object to object impact force on a single vector. It does very poorly when you start twisting and pulling at it. It does not resist shear forces well. While the pickup tooth is a point of contact, the rest of the piston body is subjected to shear force where the pickup meets the body. It will crack or tear.
What you want is a polymide piston, this material is often mislabeled as polycarb, but CARB IS CLEAR. mide is not. That's how you tell the difference. This is just me repeating info from someone who knows the material better. I myself only use nylon fiber pistons with metal racks. Nylon fiber is reinforced with fibers much in the same way that fiberglass or carbon fiber works in principle, or in the construction world, you have rebar in concrete and fiber reinforced concrete.
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well actually, I don't even completely remove the 1st normal tooth (I call it the 2nd tooth btw) I take it down to where it clears the pickup, and if the sector gear doesn't like it, it'll just wear itself down harmlessly.
also, the 3rd tooth at 50% height generally clears for me, and if it doesn't it'll wear down harmlessly.
use polycarb in your bullet-resistant windows and hockey rink glass. until we find something better, glass-fibre reinforced nylon is where it's at.
also, Lonex reds are AMAZING, but REALLY REALLY need to be lightened. A LOT.
also, if you have the luxury of going to a local store to inspect your potential new SHS piston in person, DO IT. even if it is $20 in person rather than $8.50 from HK. they're great pistons, but have quite a few issues, so an inspection beforehand is priceless. (also you get to chill at an airsoft store for a while. usually motivation enough.)
as far as AoE correction, I generally don't even go for 12:00. after factoring sorbo compression, I shoot for flush tooth-to-tooth contact. for some pistons/sectors, it's quite a ways away from 12:00. do keep in mind that I'm a crazy idiot who has a 1/4" sorbo pad AND the stock cylinder head pad on top. still doesn't reach 12:00. =D