Timken - Ball Bearing Housed Units

BALL BEARING HOUSED UNITS
BALL BEARING HOUSED UNITS • MACHINE UNITS
MACHINE UNITS
A complete machine unit consists of either a standard (SM) or heavy (SMN) series wide-inner-ring
ball bearing, an inner and outer sealing cap, a retaining wire and self-locking collar, or an integrally
sealed bearing and collar. These units are available as bearing replacements for Timken power
transmission units such as the SA, SAO, DSA and DSAO pillow blocks, and C and Co cylindrical
cartridges or special housings.
A TYPE
These are available in two types, A and B, as described below.
COLLAR
WIRE
A CAP
B CAP
BEARING
A-TYPE
Fig. A-27 shows a machine unit with an A-type bearing
carrying the designation MUA (standard series) and MUOA
(heavy series). It consists of a wide inner ring, open type or
one-piece R-seal bearing, collar, caps and wire. The “caps” are
two steel members which comprise a non-integral frictionless
labyrinth seal. The inner member is pressed on the inner ring
and rotates with it. The outer member is pressed in the housing
against the face of the outer ring and is held in place by the round
retaining wire.
COLLAR
WIRE
A CAP
B CAP
BEARING
B-TYPE
Fig. A-28 is the same as fig. A-27, except that the bearing is B-type
and the seal on the collar side is either a labyrinth seal (as shown)
or a one-piece R-seal. In the latter case no wire is supplied.
The designation of the machine unit is MUB (standard series)
or MUOB (heavy series). The B-type bearing is mounted in the
spherical housing seat by means of two slots milled diametrically
opposite each other in the housing. The bearing can be inserted
at right angles and swiveled into position. No additional shoulders
or snap rings are required to locate this type.
COLLAR
WIRE
A CAP
B CAP
BEARING
A TYPE
B TYPE
Fig. A-27. MUA, MUOA.
Fig. A-28. MUB, MUOB.
COLLAR
WIRE
A CAP
B CAP
BEARING
B TYPE
TIMKEN ® HOUSED UNIT CATALOG • Download 3D Models and 2D Drawings at cad.timken.com A-161