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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.
Click on the pictures for a detailed view.
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PART NO. |
RUDDER SHAFT dia. |
BODY dia. |
D RUDDER TUBE dia. T |
HEIGHT H |
WEIGHT |
WORKING LOAD (max) |
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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
|
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41060-41069
|
60 to 69mm |
99mm
|
90mm
|
115mm
|
0,85kg |
4500kg
|
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41070-41079
|
70 to 79mm |
109mm
|
100mm
|
115mm
|
0,90kg |
5100kg
|
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41080-41089
|
80 to 89mm |
119mm
|
110mm
|
115mm
|
1,0kg |
5700kg
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41090-41094
|
85 to 94mm |
128mm
|
110mm
|
156mm
|
1,9kg |
8900kg
|
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41095-41104
|
95 to 104mm |
138mm
|
120mm
|
187mm
|
2,3kg |
12800kg
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41105-41114
|
105 to 114mm |
148mm
|
130mm
|
187mm
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2,5kg |
14000kg
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41115-41124
|
115 to 124mm |
158mm
|
140mm
|
182mm
|
2,7kg |
15300kg
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41125-41134
|
125 to 134mm |
168mm
|
150mm
|
187mm
|
2,9kg |
16600kg
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41135-41144
|
135 to 144mm |
178mm
|
160mm
|
182mm
|
3,1kg |
17900kg
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41145-41154
|
145 to 154mm |
188mm
|
170mm
|
182mm
|
3,3kg |
19200kg
|
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41 +
shaft dia. |
155 to 350mm |
CUSTOM
MADE |
CUSTOM
MADE |
CUSTOM
MADE |
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CUSTOM
MADE |
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The applications for the 41000 series bearing: |
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The 41000 series Jefa rudder bearings are
the first type of roller bearings that were produced by Jefa marine. In
the past 20 years more than 10.000 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. |
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