On Friday, September 13, 2013 1:31:00 PM UTC-7, Eli the Bearded wrote:
My youngest has a Razor Scooter, looking something like this one:



http://www.target.com/p/razor-ultra-...r/-/A-11893958



The handle bar is a single piece T shape that slips on to a groved (looks

threaded, but seems to be a series of parallel notches) stem in the base.

Then a collar with two 7mm socket cap screws (a very difficult item for

me to find for sale) that secure the collar and clamp the bottom of the

T to the stem.



The problem is that the handlebar doesn't stay aligned with the wheel.

A bump or a crack will twist the wheel one way while the handlebar is

going the other, and oops, out of alignment.



The razor website sells replacement collars that use four of those screws,

for a better hold. Alas, those are for a different model and the collars

are a few mm too small.



I was thinking of taking it apart and applying red thread lock (loctite)

on the groves of the stem so that it gets second way of securing to the

handlebars.



I could, but am not enthusiastic about the idea, drill through things

and add some sort of cross piece, eg, a heavy duty cotter pin. Thread

lock seems less permanent than epoxy or welding, so if I need to take

it apart to repair or replace a piece I have that as an option.



How does that plan sound?



Elijah

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shipping from the razor website is a killer, too

seat post clamps on bicycles are a another type of "collar clamp". If you type in collar clamp in a search, that should get you to all types of the devices. Another thing, in the picture of the scooter from the target website, the slot cut in the tube doesn't line up with the opening in the clamp. So the clamping effect would be not at its best. Pat