Suffixes T - Z

TWindow-type cage of fabric reinforced phenolic resin, rolling element centred
TAWindow-type cage of fabric reinforced phenolic resin, outer ring centred
TBWindow-type cage of fabric reinforced phenolic resin, inner ring centred
TBTSet of three matched single row deep groove or angular contact ball bearings; two bearings arranged back-to-back and the third in tandem
TFTSet of three matched single row deep groove or angular contact ball bearings; two bearings arranged face-to-face and the third in tandem
THSnap-type cage of fabric reinforced phenolic resin, rolling element centred
TNInjection moulded cage of polyamide 66, rolling element centred; for needle roller bearings, the cage is glass fibre reinforced
TNHInjection moulded cage of glass fibre reinforced polyetheretherketone (PEEK), rolling element centred
TNHAInjection moulded cage of glass fibre reinforced polyetheretherketone (PEEK), outer ring centred
TN9Injection moulded cage of glass fibre reinforced polyamide 66, rolling element centred
TRThree single row deep groove ball or cylindrical roller bearings, matched to give equal distribution of radial load
TTSet of three matched single row deep groove or angular contact ball bearings arranged in tandem
U
  1. U combined with a one-figure number identifies a taper roller bearing, cone or cup, with reduced width tolerance.

    Examples:
    • U2: Width tolerance 0+0,05/0 mm
    • U4: Width tolerance 0+0,10/0 mm
  2. Y-bearing without locking collar
  3. Y-bearing locking collar without grub screw
UPSpecial tolerance class for machine tool spindle bearings; dimensional accuracy approximately to ISO tolerance class 4 and running accuracy better than ISO class 4
VFull complement bearing (without cage)
V...V combined with a second letter, identifies a variant group, and followed by a three- or four-figure number denotes variants not covered by "standard" designation suffixes. Examples:
VA Application oriented variants
VB Boundary dimension deviations
VE External or internal deviations
VL Coatings
VQ Quality and tolerances other than standard
VS Clearance and preload
VT Lubrication
VU Miscellaneous applications
VA201Bearing for high-temperature applications (e.g. kiln trucks)
VA208Bearing for high-temperature applications
VA216Bearing for high-temperature applications
VA228Bearing for high-temperature applications
VA301Bearing for traction motors
VA305Bearing for traction motors + special inspection routines
VA3091Bearing for traction motors with aluminium oxide coated outside surface of outer ring for electrical resistance up to 1 000 V DC
VA320Bearing for railway axleboxes according to EN 12080:1998
VA350Bearing for railway axleboxes
VA380Bearing for railway axleboxes according to EN 12080:1998
VA405Bearing for vibratory applications
VA406Bearing for vibratory applications with special PTFE bore coating
VA701Bearing for paper machines
VA820Bearing for railway axleboxes according to EN 12080:1998
VC025Bearing with specially debris-heat-treated components for applications in heavily contaminated environments
VE240CARB bearing modified for greater axial displacement
VE447Shaft washer with three equally spaced threaded holes in one side face to accommodate hoisting tackle
VE552Outer ring with three equally spaced threaded holes in one side face to accommodate hoisting tackle
VE553Outer ring with three equally spaced threaded holes in both side faces to accommodate hoisting tackle
VE632Housing washer with three equally spaced threaded holes in one side face to accommodate hoisting tackle
VG114Surface-hardened pressed steel cage
VHFull complement cylindrical roller bearing with self-retaining roller set
VGSInner ring raceway of cylindrical and needle roller bearings pre-ground only, for cylindrical roller bearings replaced by /VU001
VL0241Aluminium oxide coated outside surface of outer ring for electrical resistance up to 1 000 V DC
VL0271Aluminium oxide coated outside surface of inner ring for electrical resistance up to 1 000 V DC
VQ015Inner ring with crowned raceway for increased permissible misalignment
VQ424Running accuracy better than C08
VT143Extreme pressure grease with a lithium thickener of consistency 2 to the NLGI Scale for a temperature range –20 to +110 °C (normal fill grade)
VT378Food grade grease with an aluminium thickener of consistency 2 to the NLGI Scale for a temperature range –25 to +120 °C (normal fill grade)
VU001Preground raceways
WWithout annular groove and lubrication holes in outer ring
WTGrease fill for low as well as high temperatures (e.g. –40 to +160 °C). WT or a two-figure number following WT identifies the actual grease. An additional letter or letter/ figure combination as mentioned under “HT” identifies filling degrees other than standard.

Examples:
  • WT or WTF1
W20Three lubrication holes in the outer ring
W26Six lubrication holes in the inner ring
W33Annular groove and three lubrication holes in the outer ring
W33XAnnular groove and six lubrication holes in the outer ring
W513Six lubrication holes in the inner ring and annular groove and three lubrication holes in the outer ring
W518Six lubrication holes in inner ring and three lubrication holes in outer ring
W64Solid Oil filling
W77Plugged W33 lubrication holes
X
  1. Boundary dimensions altered to conform to ISO standards
  2. Cylindrical runner surface (track runner bearings)
YPressed brass cage, rolling element centred; different designs or material grades are identified by a figure following the Y, e.g. Y1
Z
  1. Combined needle roller bearings with cover
  2. Shield of pressed sheet steel on one side of the bearing
2ZZ-shield on both sides of the bearing
ZWDouble row needle roller and cage assembly
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