Withdrawal Sleeves
| Number | |
| Brand | URB |
| Classification | Adapter and Withdrawal Sleeves |
Withdrawal sleeves (see sketch below) are slotted steel sleeves that have a tapered outer diameter on one side and a thread on the large
diameter on the opposite side.
Standard withdrawal sleeves have tapered outers, taper 1:12 except for withdrawal sleeves of series AH 240 and AH 241 having tapers 1:30.
URB Withdrawal Sleeves are supplied without lock nut as standard.
URB Withdrawal Sleeves are produced in two different designs as standard.
Beside the standard design (see figure a), larger withdrawal sleeves from bore diameter 200 mm onwards are also available with oil bores
and oil distribution ducts as required for applying the oil injection method as shown in figure b. URB withdrawal sleeves that are foreseen
with facilities for an application of the oil injection method are designated “AOH...”
When withdrawal sleeves are used, the bearing inner ring must to be supported by an effective suface contact, such as a shaft shoulder,
(see figure a). Where larger radii bearing journals and shaft shoulders are necessary for strenght reasons, (e.g. where such radii become
larger than the bearing fillet, suitable distance rings must be applied.)
In each case the withdrawal sleeves must be secured against axial displacement loosening by means of lock nuts (see fig. c) or end plates (fig. d).
