PhotoLYS 204 2F
Y-Bearing Plummer Block Units With Grey Cast Iron Housing "S"
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LYS 204 2F
Cross references
| Manufacturer | Designation / part number |
|---|---|
| SKF | SY 20 WF |
| INA | RASE20-N |
| SNR | EXP204 |
| SNR | EXPE204 |
| NTN | UELP204D1W3 |
Type equivalents according to FKL's interchange table (Ball Bearings and Bearing Units catalogue, section 3.3). Each designation has been checked for this size in that maker's own catalogue; compare the dimensions before ordering.
What the designation means
2F- One lip rubber metal seal + flinger, on both sides
Technical specifications
Dimensions and load ratings – symbols refer to the technical drawing.
| Symbol | Parameter | Value |
|---|---|---|
| d | Bore diameter | 20mm |
| L | Overall length | 127mm |
| A | Housing contact surface width | 34mm |
| A1 | Width of the top of the housing | 23mm |
| H | Housing height | 63.8mm |
| H1 | Distance from the contact surface to the bearing axis | 33.3mm |
| H2 | Housing foot thickness | 14mm |
| Jmin | Min. distance between the holes | 89mm |
| Jmax | Max. distance between the holes | 104.5mm |
| N | Diameter of attachment slot | 13mm |
| N1 | Length of attachment slot | 20.7mm |
| s1 | Distance from locking device side face to raceway centre | 26.6mm |
| kg | Mass | 0.62kg |
| Cdyn | Dynamic load rating | 12.7kN |
| Co | Static load rating | 6.55kN |
| Pu | Fatigue load limit | 0.28kN |
F SEAL / F SEAL (2F)
Dual sealing, protection cover placed on the inner ring protects against rough impurity particles and makes the labyrinth with the sheet part of the seal; then the sealing S type, with the labyrinth between the sheet part and the rubber lip that conducts the contact sealing. The friction and speeds are the same as with S but has much better protection against rough impurity particles. It is very good sealing system: the sheet part protects the seal from the soil, dust and rough particles. At the same time makes the labyrinth with the rubber part. The rubber part provides the contact sealing that prevents the penetration of the finer impurities, water, moisture, steam etc. Suitable for heavier conditions due to better protection against foreign matters. It is used with the Y bearings (standard).
Overview of all sealing types
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View entire category · Housing Type S (72)
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