It really comes down to the actual swivel itself....
The design!!
Ease of servicing the swivel to keep it serviceable
If there are failures?
How long will a replacement bearing take to get to me?
How often they are failing?
And why they are failing?
Is the vacuum running through the wand sucking out all the grease promoting early wear?
The bearing replacement, how hard or how easy it is for me to replace or do I have to get a shop with a hydraulic press to do it? Or do I have to send it back to the manufacturer for refurbishment?
How much do the bearings cost to manufacture(effects wand price) and also the effects the cost to buy a replacement bearing outside of warranty.....
So far NOONE has made a swivel bearing wand that can answer these questions....
Dang and Conway and MYTEE all make wands with bearings that need to be replaced
Toms wand has to be sent back to Tom for replacement
Dangs wand-please correct me if I’m wrong or design has changed but if the groove for the drop in bearings wears the plenum is worn as the plenum is the outer race, making it irreparable and requiring a new plenum
MYTEEs bearing on the shaft can be replaced but it’s a major PITA and by the time alloy bearing on the tube has worn, it’s most likely worn into the brass outer race in the plenum and even with new bearing replacement on the shaft, there’s too much wear in the brass plenum sleeve for it to work like new again, so all that effort to half fix is damn annoying
