Self-aligning PETP top roller bearings type 6BF


The 6BF PETP bearings are designed to be mounted as top bearing in a GRP or metal tube (like our 6D bearings). Below table lists the tube inner diameter (Db) and the available shaft diameters. Df = Db + 10 mm.
Click on the picture for a larger view.

Db
(mm)

RUDDER SHAFT dia. "D"

Code Number

80

30 to 45 mm

6BF080030 to 6BF080045

100

30 to 60 mm

6BF100030 to 6BF100060

120

30 to 72 mm

6BF120030 to 6BF120072

140

30 to 95 mm

6BF140030 to 6BF140095

170

41 to 125 mm

6BF170041 to 6BF170125

200

58 to 160 mm

6BF200058 to 6BF200160

The safe working load of the bearings is in direct relation with the shaft diameter. Please look on the 6T bearing page for the working load in relation to the shaft diameter.

The applications for the 6BF series bearing:
The 6BF PETP self-aligning roller bearings are designed to be mounted as top bearing in a GRP or metal tube (like our 6D bearings). The bearing is made of PETP (also known as Arnite, Ertalyte, Sustodur & Ultradur), so it doesn't consist of any metals. The bearing ball can be easily dismounted out of the housing for installation safety or replacement when any damage in the future may happen.

The mounting of the 6BF series bearing:
The 6BF bearing should be mounted in the tube with Sicaflex 221 or 291 or equivalent. A groove is turned in the outer housing to allow a local concentration of Sicaflex. An O-ring in the bottom of the housing will help to keep the Sica around the bearing. We advise to cut a small hole in the tube and inject the glue. This will make sure the complete bearing is glued around. Please see the picture at the right. Click for larger view

The dismounting of the 6BF series bearing:
Click for larger view In the case of damage or any unforeseen circumstance,  the internal part of the bearing, the so called ball with rollers can easily be removed by rotating it 90 and pulling it out of the groove. The outer housing should never be removed. A light film of grease should be between the ball and housing. No grease is allowed inside the bearing, between the rollers.