Designation system

The complete designation for a Y-bearing or a Y-bearing unit consists of a basic designation with or without one prefix and/or one or more suffixes.

For details about Y-bearing designation system, refer to Y-bearings.

Y-bearing units

Designation examples and the applicable options for Y-bearing units are given below.
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Examples


Metric unit:
SYK 20 TDwhereSY =
K =
20 =
TD =
FYWK 50 LTHRwhereFY =
W =
K =
50 =
L =
THR =

Inch unit:
SY 2 11/16 LF/AH
whereSY =
2 11/16 =
LF
AH =

Applicable options for Y-bearing units

Housing/unit type

J stands for dimensions in accordance with JIS 1559-2009 for normal base plummer block, flanged and take-up housings

W at the end of the housing series designation identifies an SKF Food Line Y-bearing unit or housing
FYSquare flanged housing
FYA
3-bolt bracket flanged housing
FYC

Round flanged housing

FYMSquare flanged housing, higher load carrying capacity
FYT(B)Oval flanged housing
PPlummer block housing, pressed steel
P .. RPlummer block housing, pressed steel, rubber seating ring included
PF
Round flanged housing, pressed steel
PFDTriangular flanged housing, pressed steel
PFTOval flanged housing, pressed steel
SYPlummer block housing, normal base
SYFPlummer block housing, short base
SYHPlummer block housing, normal base, lower centre height H1
SYMPlummer block housing, normal base, higher load carrying capacity
TUTake-up housing

Housing material
Grey cast iron
DSpheroidal graphite cast iron
K
Composite
R
Stainless steel

Size identification
Bearing units for metric shafts: bearing bore uncoded
12
to
100
12 mm
to
100 mm
Bearing units for inch shafts: bearing bore uncoded
1/2
to
3
1/2 in. (12,7 mm)
to
3 in. (76,2 mm)
Housings made of cast iron, composite, composite for SKF Food Line or stainless steel
503
to
520
for Y-bearings of sizes 203, 203-008, 203/12 and 203/15
to
for Y-bearings of size 220
Housings made of pressed steel (not supplied as bearing unit)
40
to
90
40 mm housing bore diameter
to
90 mm housing bore diameter

Additional housing features
A
Next smaller size than normal (inch units only)
LSuitable for ECL end cover
N

Relubricable execution of composite housing.

In case of SKF Food Line Y-bearing units only used in combination with suffix VZ1A2 (→ )

YSuitable for ECW end cover
ZShort base unit with inch thread

Inserted Y-bearing
FMY-bearing with an eccentric locking collar, YET 2 series
KFY-bearing with a tapered bore on an adapter sleeve, YSA 2-2FK series
LD, LDW
Y-bearing with SKF ConCentra locking, YSPAG 2 series
LFY-bearing with SKF ConCentra locking, YSP 2-2F series
RM
Y-bearing with grub screws, YAT 2 series
TASKF Food Line Y-bearing with grub screws, YAR 2-2RF/VE495 series
TD, TDW
Y-bearing with grub screws, YARAG 2 series
TF
Y-bearing with grub screws, YAR 2-2F series
TH
SKF Food Line Y-bearing with grub screws, YAR 2-2RF/HV series
THR
SKF Food Line Y-bearing with grub screws, YAR 2-2RFGR/HV series
TR
Y-bearing with grub screws, YAR 2-2RF series
WD, WDW
Y-bearing with an eccentric locking collar, YELAG 2 series
WFY-bearing with an eccentric locking collar, YEL 2-2F series
WRY-bearing with an eccentric locking collar, YEL 2-2RF series

Suffixes - other features
AHY-unit for air-handling application
VL065Zinc-coated bearing inner ring bore and side faces
VZ1A2
Relubricable execution of SKF Food Line Y-bearing unit with composite housing, only used in combination with suffix N (→ ).
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