Lower Roller Bearings type 41000


Type 41000 bearing

The table below shows all key dimensions of the 41000 series bottom roller bearings. The measurement T is the outside diameter for the rudder tube or the lip seal which will be mounted inside the bearing housing. To achieve the working load above 89 mm, two sets of rollers will be mounted.
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PART NO. RUDDER SHAFT dia. BODY dia. D  RUDDER TUBE dia. T HEIGHT H WEIGHT WORKING LOAD (max)
41030-41039 30 to 39mm 69mm 60mm 90mm 0,35kg 2000kg
41040-41049 40 to 49mm 79mm 70mm 90mm 0,50kg 2500kg
41050-41059 50 to 59mm 89mm 80mm 115mm 0,65kg 3900kg
41060-41069 60 to 69mm 99mm 90mm 115mm 0,85kg 4500kg
41070-41079 70 to 79mm 109mm 100mm 115mm 0,90kg 5100kg
41080-41089 80 to 89mm 119mm 110mm 115mm 1,0kg 5700kg
41090-41094 90 to 94mm 128mm 110mm 156mm 1,9kg 8900kg
41095-41104 95 to 104mm 138mm 120mm 187mm 2,3kg 12800kg
41105-41114 105 to 114mm 148mm 130mm 187mm 2,5kg 14000kg
41115-41124 115 to 124mm 158mm 140mm 182mm 2,7kg 15300kg
41125-41134 125 to 134mm 168mm 150mm 187mm 2,9kg 16600kg
41135-41144 135 to 144mm 178mm 160mm 182mm 3,1kg 17900kg
41145-41154 145 to 154mm 188mm 170mm 182mm 3,3kg 19200kg
41 + shaft dia. 155 to 350mm CUSTOM MADE CUSTOM MADE CUSTOM MADE   CUSTOM MADE

The applications for the 41000 series bearing:
The 41000 series Jefa rudder bearings are the first type of roller bearings that were produced by Jefa marine. In the past 30 years more than 25.000 of these bearings have been produced. This bearing is typically suitable for GRP or wood core cruising yachts where a light revolving and backlash free rudder system is required that will not be stretched to the limits as on racing yachts. The bearing is also perfect as hull bearing for skeg rudders as the skeg will prevent the shaft from bending. The disadvantage of this bearing is the fact that due to the high tolerances between the shaft and bearing it has to be glassed in combination with the shaft present in the yacht. For one-off projects this is mostly not a problem. For production environments Jefa marine can supply a dummy shaft (a rudder shaft without the part that normally sticks out beneath the hull). This bearing should not be used in aluminium and steel hulls. It's better to use the 43000 series self aligning bearings for these types hulls.
The bearing can be sealed by a rudder tube or double lip seal inside the top register.

Service information:
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