If you are only using an allen wrench / key you will need to use aOk, you guys have me worried, I just installed my mm adaptor and don't want to goof it up. I don't have a torque wrench (I know, I know hf has them cheap) and just tightened as much as dared. How hard/easy would it be to strip those threads? I worry about aluminum, having some bad experiences in the past.
Just a little word of advice on using set screws for this application.......check them and tighten them frequently if necessary. I can almost guaranty you they will come loose.....loctite or not.I have also had some trouble with the adapter slipping. It hasn't ruined my spokes yet, but it is a concern especially as I'm planning to install a 79cc predator some time later this year. The adapter will slip and hit my spokes. So what I did was went to Home Depot and bought two #10-32 x 3/4 set screws. I've got a buddy who has a drill press and tap set. I'm planning to drill and tap it next weekend. I'm going to use both set screws at slightly opposite angles toward the hub. I'm pretty confident that this will keep it from slipping. It also doesn't require cutting or grinding, or disassembling the wheel. Not knocking the OP, I think he had a good idea too. Right now I just can't afford a dremel or bits for it. So I came up with a different idea.
ok if anyone is still reading this and interested even after all my anxious rants!! i now finally got this dang hub adapter to stop slipping. I came to terms that just having it clamped with even 20lbs of force was not enough to keep that dang adapter from slipping. i have an ezqmatic tranny so i assumed because its such a beast that there was just too much power with that baby to keep a just clamped adapter still.
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What this should have told you is that 20 ft lb isn't tight enough. I was having the same problem. I solved it with 25 ft lb.