[quote=jander14indoor] use slices off teflon tubes. I find the black plumbign O-rings to heavy and when the twist, they defeat the purpose!
Stiff enough to stay open when wound, but soft enough so the edges don't damage the rubber.
Low cost, I priced replacing the RC car antenna cover I bought 4 or 5 years ago (the remaining length is getting pretty short) with a new piece and its only 2 or 3 dollars. And I've cut a LOT of rings for the clinics I run from the piece I started with. You can also scrounge them from old ball point pens, spray bottles, etc. for nothing.
Wt, very low. A pair for SO is only .03 gm or so (you could probably go lighter but I don't want to risk the ring failing), less than 2 percent of the 1.5 gm SO max. Maybe I'm clumsy, but I lose more turns getting wound motors without O-rings off a winder and torque meter.
I dont understand how your O-rings weigh so little. What is the OD/ID?
2008 NY BLG Champ
2010 NY Helicopter Champ