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FAG
Four Point Contact B. FAG QJ309 -MPA
- Technical data
- Inner diameter
- 45 mm
- Outer diameter
- 100 mm
- Width
- 25 mm
- Seal
- None, open bearing
- Cage
- Brass cage
- Clearance
- Normal radial clearance
- Running accuracy
- Tolerance class P0/PN2 / ABEC 1
- Groove(s) on outer ring
- Without groove
- Design
- Split inner ring
- Temperature range
- -30 to +150 °C
- Weight
- 1,02 kg
| Scale quantity | Your discount | Unit price |
|---|---|---|
| 10 | 4,98 € | 94,71 € |
| 20 | 9,96 € | 89,73 € |
Four Point Contact B. FAG QJ309 -MPA
The FAG QJ309-MPA four-point bearing (45x100x25 mm) accommodates high axial loads in both directions whilst requiring minimal axial installation space.
The QJ309-MPA four-point bearing is a single-row rolling bearing with a split inner ring that transmits axial loads in both directions. With key dimensions of a 45 mm bore, 100 mm outer diameter and 25 mm width, this roller bearing requires little axial installation space. This open bearing from FAG Rolling Bearings features a solid brass cage and standard radial clearance. It is available in standard tolerance class P0/PN (ABEC 1), designed for operating temperatures ranging from –30 to +150 degrees.
What is the QJ309-MPA four-point bearing suitable for in industrial plant?
This four-point bearing is primarily suitable for designs in which predominantly axial forces act from both directions. This design is often used as a pure axial bearing in combination with a separate radial bearing. Thanks to the split inner ring, the bearing accommodates more rolling elements, which increases its axial load capacity. As the outer ring has no groove, it is secured in the housing using conventional stop shoulders and clamping rings.
What advantages does the split inner ring of the QJ309-MPA offer during installation?
The two-piece inner ring simplifies installation, as the outer ring with ball cage and the two inner ring halves can be fitted separately. The component is not self-retaining, which allows you to establish fits on the shaft and housing independently of one another. During design, ensure that both inner ring halves are fully axially secured during operation. When selecting a lubricant, ensure it is suitable for the temperature range of -30 to +150 degrees.
What are the dimensions of the QJ309-MPA four-point bearing?
The roller bearing has a bore of 45 mm, an outer diameter of 100 mm and a width of 25 mm. These standardised dimensions allow it to be fitted in existing assemblies. It is manufactured to tolerance class P0/PN or ABEC 1 for standard precision in mechanical engineering.
What is the function of the brass cage in the QJ309-MPA four-point bearing?
The brass cage guides the balls evenly along the raceway and prevents direct contact between the rolling elements. Brass is characterised by high strength and thermal stability. This makes this type of cage suitable for demanding operating conditions within the permissible temperature range of between -30 and +150 degrees.
Why does the QJ309 four-point bearing have a split inner ring?
The split inner ring allows a greater number of balls to be fitted into the bearing during assembly than is possible with solid rings. This increases the axial load-carrying capacity in both directions. Furthermore, the non-self-retaining design facilitates the separate installation of the outer ring, ball cage and inner ring halves onto the shaft and housing.
What type of lubrication does the QJ309-MPA open four-point bearing require?
As this roller bearing is designed as an open bearing without integrated sealing washers, you must protect the lubrication point from dirt using the housing or external seals. Depending on the system, lubrication is provided using lubricating oil or grease. The lubricant selected should be suitable for operating temperatures ranging from -30 to +150 degrees.
In which directions can the bearing absorb axial forces?
Thanks to its special raceway cross-section, the QJ309-MPA four-point contact bearing accommodates axial loads in both axial directions. Under load, the balls contact the raceways at defined contact points. Where the load is predominantly axial, such a bearing often replaces two angular contact ball bearings arranged in a mirror-image configuration, thereby saving valuable installation space.
What does the specification of the standard radial bearing clearance for this bearing mean?
The standard radial bearing clearance refers to the factory-set internal radial clearance prior to installation. It is designed for standard fits and standard operating temperatures. Under normal temperature conditions ranging from -30 to +150 degrees, this ensures that the necessary operating clearance for low-friction bearing operation is maintained.
Schaeffler Technologies AG & Co. KG
Industriestraße 1-3, 91074 Herzogenaurach, Germany
info.de@schaeffler.com, https://www.schaeffler.de/de/meta/impressum/
10005487