Need help with a tire swing. Can you help me find a heavy load swivel?

See images here: Imgur -- Imgur

I put in a tractor tire swing and tried to overbuild it, as we have 4 crazy kids and they all have crazy friends. We've had as many as 14 little guys on the swing at a time. So, I tried to find a swivel that would allow the swing to spin. This one worked well for a few years, then as it's been used over time, the swivel has almost frozen up. There has to be a swivel out there that can take a lot of weight and still spin.

GOAL: Give the tire swing the ability to swing and swivel with a load. Usual load would be 3 children. Max load - 400lbs - I'd like to find something that will accomplish the goal with the max load, for the least amount of money.

I was thinking something like this: http://ift.tt/1FUg0tm
But I'm not smart enough to know if this is correct for the application, or how to read the weight abilities of the unit.

Any recommendations?
TIA.

Submitted May 31, 2015 at 04:16AM by NachoDynamite http://ift.tt/1cqgKKO