Page 79 - Y-bearing-units

Table 2
Y-bearing unit designation system
1
Examples FYTBK 30 TR FY TB K 30 TR
SY 1.1/2 TF SY 1.1/2 TF
TUJ 50 TF TUJ 50 TF
PFD 40 PF D 40
Identification of housing type
J stands for dimensions to standard JIS 1559-1995
FY(J) Flanged housing
P Plummer block housing, pressed steel
PF Flanged housing, pressed steel
SY(J) Plummer block housing
TU(J) Take-up housing
Identification of unit design
– Base version; when flanged: square flange
C Flanged unit, round flange
D Flanged unit, triangular flange
F Plummer block unit, short base
H Plummer block unit, lower centre height
M Plummer block unit, higher load carrying capacity
T Flanged unit, oval flange
TB Flanged unit, oval flange
TF Flanged unit, oval flange, no relubrication facility
Identification of housing material
– Grey cast iron
K Composite
Z Grey cast iron zinc coated
R Stainless steel
Identification of size
Bearing units for metric shafts: in millimetres uncoded
12 12 mm bore diameter
to
100 100 mm bore diameter
Bearing units for inch shafts: in inches uncoded
3/4 3 /4 in. = 19,05 mm bore diameter
to
2 1/2 2 1 /2 in. = 63,5 mm bore diameter
Housings from grey cast iron or composite material
503 for Y-bearings of sizes 203, 203/12 and 203/15
to
520 for Y-bearings of size 220
Housings from sheet steel (not supplied as bearing unit)
40 40 mm housing bore diameter
to
90 90 mm housing bore diameter
Identification of inserted Y-bearing
FM Y-bearing with an eccentric locking collar, YET 2 series
KF Y-bearing with a tapered bore, YSA 2-2FK series
LF Y-bearing with SKF ConCentra locking
RM Y-bearing with grub screws, YAT 2 series
TF Y-bearing with grub screws, YAR 2-2F series
TR Y-bearing with grub screws, YAR 2-2RF series
WF Y-bearing with an eccentric locking collar, YEL 2-2F series
Other features
See table 1 “Y-bearing designation system”

77