Yep another great coupling from nearby 2 hours from where I'm based. I first saw it over a year ago, not sure how their developments is going.
There is nothing wrong with a Cardan shaft or CV joint but they have limitations that have been overcome with the Thompson coupling. Mostly power...
The big problem with cardan shaft couplings is that they are not constant velocity, so they exhibit vibration from the constant acceleration and...
Aluminium bearing carriers Yep, many Aluminium boats have Al bearing carriers whether stern tube or P bracket / strut. Some bearing suppliers...
The biggest problem I see is the overhang, that will cause the shaft to sag or even bend when left ashore with a heavy prop. We aim to get the...
I don't often feel I have to openly disagree with comments but UHMWPE does absorb water as do most composites to some degree, it can be small but...
You can fit shaft bearings as a clearance fit bedded on epoxy, some manufacturers recommend this approach. This makes fitting and removal much easier.
Yes, each manufacturer will also have their own data or should. Maritex bearings recommend 2ltr/min for a 1.5" water lubricated shaft bearing....
If you are pressing it in I'd leave it at 5" and then you have something to grab hold of when you need to change it. It certainly won't do any...
Seeing as bearing/bush material has been discussed, the fact that most people look at moisture absorption is a red herring in composites, acetals...
Sorry to disagree (I feel I have to correct this statement as it is a bit misleading) Vesconite does swell in water and it also has fairly high...
You can't use a CV coupling (aft of the thrust bearing) unless it is the hydradrive marine joint as this is the only one that will take the thrust...
I find that many vessels do not have standard sizes as supplied by the old style rubber in bronze bearings. The new materials can also be used as...
That's because they do run the engines for long periods in deep water (as you said without sand/silt). Bearings only wear during start up and run...
As I thought, this material is a phenolic cotton composite fibre layered. A more recent development (10 years old now) is Maritex from Perth...
Novasteen seems to be an older form of a phenolic and cotton material, quite good but possibly suffering from higher thermal expansion than...
The bearing friction at rest is a bit of a red herring as the rollers in oil will be a lot less than a dry rubber bearing, but once they are...
The results I've seen are quite conclusive. The boat was run with open shafts and engine loads were measured along with a video which picked up...
Tubes around the shaft have been used quite a bit and the efficiency gained has been measured on an oil filled system running on roller bearings...
There's been some hard evidence recently from UK pilot boat that showed wear rates at a third of that of a good quality rubber bearing, so the...
