RWO 38mm Triple Blocks.......

[Sy-Revolution]

......breaking loads kilograms 900kg
max working loads kilograms 230kg
ball bearing

Would these be man enough for a kicker setup on a 36ft cruiser? Boom length 3.5m.


Cheers,

Crispin.

 

[stevebrassett]

As far as I am aware, ball bearing blocks are not recommended where the load does not move much - e.g. a kicker. The small movements under high loads wears the ball bearings out quickly. Plain bearings are better for this kind of load, and ball bearings are better for loads that move quickly, such as mainsheets or genoa sheets.

 

[Sy-Revolution]

Ahh.......... One learns something new every day on here! Thanks /forums/images/graemlins/smile.gif

 

[rogerdog]

Not ideal for the reason stated, ball bearings are poor for continual loads as the races become pitted by the constant point loading of the ball bearings (if enough load) ok we could get into the whole "will the tension be that constant" but - use a plain type bearing block, end of problem .

 

[Sy-Revolution]

Would around 40mm be big enough in plain bearings or should I go bigger?

 

[vyv_cox]

40 mm sounds like the size I have, although not the same manufacturer. I only have doubles and tighten them with a winch if necessary. They've been there a long time now, so I guess they are OK.