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Y-bearing unit SKF SYFJ 504
- Manufacturer Part Number
- SYFJ 504
- Brand
- SKFOfficial brand
- Category
- Bearing housings
- Subcategory
- Y-bearing unit
Other brands in this category
Ask us about alternatives. Equivalence is verified for each reference and application.
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Description
SKF SYFJ 504 is a y-bearing unit reference, within Bearing housings. Request a quote for SYFJ 504 via WhatsApp or email with the quantity you need; we respond promptly with lead time and equivalents.
The SKF SYFJ Y-bearing unit is an assembled unit that combines a cast iron housing with an insert ball bearing, ready to mount on shafts and bolt to the structure. It is used to guide rotating shafts in equipment where a compact, self-aligning unit with simple maintenance is needed. MR Accesorios Industriales supplies this line as an official brand, backed by more than 80 years in the industrial sector.
The SYFJ designation identifies a square flange housing of the Y family. The letters indicate the housing type and the insert's fixing system; the number that follows (504, 505, 509, etc.) is associated with the shaft diameter for which the unit is intended, according to the manufacturer's table. To choose the correct part number, you must cross-reference that number with the actual shaft size and the type of fixing the insert accepts. At MR we help you interpret the nomenclature if you send us the complete part number.
These housings appear in belt conveyors, packaging lines, mixers, fans, centrifugal pumps and transmission lines in food, chemical and materials plants. In Argentina they are widely seen in material handling equipment and agricultural machinery, where the cast iron housing withstands dust and vibration. The square flange allows bolting them to sheet metal or structural profile with four screws, which simplifies assembly and field replacement.
To select the housing, check that the shaft diameter matches the part number and that the expected radial and axial load is within what the insert accepts. The insert bearing's sealing protects against dust and splashes; if the environment is very dirty, additional protection is advisable. During mounting, seat the flange flat, tighten the screws in a cross pattern and check that the shaft turns without effort. The insert's lubrication is usually permanent, but under severe conditions it may require replenishment.
Y-bearing units are interchangeable between manufacturers that follow the same mounting standard and shaft diameter. When replacing a unit, compare the shaft diameter, the flange hole pitch and the insert's fixing type (set screw, eccentric or adapter). Having a similar part number is not enough: real interchangeability depends on those dimensions. If you have doubts, send us a photo of the part and the shaft measurements.
If you need the SYFJ housing for a running unit, write to us on WhatsApp with the complete part number (for example, SYFJ 504, SYFJ 505 or SYFJ 509) and the shaft measurements. At MR Accesorios Industriales we will quote you and advise you so that you get the correct unit. We can also look at alternatives within the same family if the exact part number is not available.
This description provides guidance on the product type. Check the configuration and dimensions of this reference.
Dimensions
Dimensions and tolerances: Send us the part number via WhatsApp and we'll confirm dimensions, sealing, and internal clearance against the manufacturer's data sheet.
Frequently Asked Questions
- How do I know which SYFJ part number corresponds to my shaft?
- The number that follows SYFJ is linked to the shaft diameter according to the manufacturer's table. Measure the shaft with a caliper and cross-reference that value with the designation. If you do not have the table, send us the measurement and the old part number by WhatsApp and we will confirm the equivalent.
- Does the insert bearing come lubricated from the factory?
- Yes, inserts in this family usually come with permanent lubrication for normal conditions. In environments with dust, moisture or high temperature, lubricant may need to be replenished. Ask us about the maintenance schedule for your application.
- Can only the insert be replaced, or does the whole housing have to be changed?
- In general, the insert can be removed and replaced separately, as long as the housing is in good condition. Check that the new insert has the same shaft diameter and fixing type. If the housing is dented or deformed, it is advisable to change the complete unit.

