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Product information

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Recommendations

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Product data Page ................4 Mounting Page ..............57 Mechanical mounting Mounting using heat Larger bearings cannot usually be mounted in the cold state as the force required increases sharply with increas- ing bearing size. Therefore, the bear- ing or housing should be heated be- fore mounting ( âž” fig ).The requisite temperature differencebetween the bearing ring and shaft or housing bore depends on the seating diameter. Generally, a temperature of 60 to 80 °C above ambient is adequate to allow the rings to be easily mounted. The temperature to which a bearing can be heated also depends on the permissible temperature for the bear- ing which may be limited, for example, by the material of the seals. Note The following tools are suitable for mounting spherical plain bearings manufacturer• a mounting dolly ( Maintenance-free spherical plain bearings and rod ends having slid- ing contact surfaces containing PTFE should never be subjected to temperatures in excess of +280 °C. PTFE is completely inert below this temperature but at high- er temperatures (from approx. 320 °C) it rapidly decomposes. The fluorine compounds released during this process are extremely toxic, even in small quantities. It should also be remembered that the material is dangerous to handle once it has been over- heated even after it has cooled down again. âž” fig ) or lengthof tubing; the ring having an interfer- ence fit should generally be mounted first;• a dolly having two abutment surfaces( âž” fig ) for mounting simultaneous-lyon the shaft and in the housing;• for larger numbers of bearings, suit-able tools can be used in combin- ation with a press (
2 âž” fig ).When mounting spherical plain bear-ings, • on no account should blows be dir-ected at the bearing rings (
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3 âž” fig );the use of a industrial hammer and drift can also easily damage the rings;• the mounting force should never bedirected through the sliding contact surfaces ( âž” fig ); this could– damage the sliding contact sur-faces and/or– expand fractured or split bearingouter rings, which would cause an increase in the mounting force required.
4 5 6 Never apply the mounting force via the sliding contact surfaces Mounting a heated bearing Fig 6 Fig 7 53