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 TD | where | SY = |  |
| K = |  |
||
| 20 = |  |
||
| TD = |  |
||
| FYWK 50 LTHR | where | FY = | |
| W = | |
||
| K = | |
||
| 50 = | |
||
| L = |  |
||
| THR = | |
||
| Inch unit: | |||
| SY 2 11/16 LF/AH
| where | SY = | |
| 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
|
| FY | Square flanged housing |
| FYA
| 3-bolt bracket flanged housing |
| FYC |
Round flanged housing |
| FYM | Square flanged housing, higher load carrying capacity |
| FYT(B) | Oval flanged housing |
| P | Plummer block housing, pressed steel |
| P .. R | Plummer block housing, pressed steel, rubber seating ring included |
| PF
| Round flanged housing, pressed steel |
| PFD | Triangular flanged housing, pressed steel |
| PFT | Oval flanged housing, pressed steel |
| SY | Plummer block housing, normal base |
| SYF | Plummer block housing, short base |
| SYH | Plummer block housing, normal base, lower centre height H1 |
| SYM | Plummer block housing, normal base, higher load carrying capacity |
| TU | Take-up housing |
| Housing material |
| – | Grey cast iron |
| D | Spheroidal 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)
|
| L | Suitable 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 (→ |
| Y | Suitable for ECW end cover |
| Z | Short base unit with inch thread |
| Inserted Y-bearing |
| FM | Y-bearing with an eccentric locking collar, YET 2 series |
| KF | Y-bearing with a tapered bore on an adapter sleeve, YSA 2-2FK series
|
| LD, LDW
| Y-bearing with SKF ConCentra locking, YSPAG 2 series |
| LF | Y-bearing with SKF ConCentra locking, YSP 2-2F series |
| RM
| Y-bearing with grub screws, YAT 2 series
|
| TA | SKF 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 |
| WF | Y-bearing with an eccentric locking collar, YEL 2-2F series |
| WR | Y-bearing with an eccentric locking collar, YEL 2-2RF series |
| Suffixes - other features
|
| AH | Y-unit for air-handling application |
| VL065 | Zinc-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 (→ ).
|
