XOU25/560 bearing
News & Updates
XOU25/560 bearing
Why the XOU25/560 Crossed Roller Slewing Bearing Exists
The XOU25/560 is a single-row crossed cylindrical roller slewing ring with an external gear and double seals. Its 458 mm bore, 690 mm outside diameter and 75 mm width sit in that useful middle ground where a machine needs a compact, geared rotary joint but not a custom forged ring. The crossed roller layout lets one bearing take radial loads, axial loads in both directions and tilting moments, so the surrounding structure can stay simpler.
At a glance
- Specification: Value
- Model: XOU25/560
- Series: Crossed roller XOU
- Type: Crossed cylindrical roller slewing rings with external gear
Because the gear teeth are cut on the outside diameter, the XOU25/560 is normally used with a pinion that drives the outer ring while the inner ring carries the table, mast or turntable. This is a practical arrangement for slow and moderate-speed indexing. It is not a high-speed spindle bearing, and it should not be selected purely by bore size. Load direction, gear torque, mounting flatness and seal environment matter just as much.
Applications and Operating Conditions That Suit It
Use this bearing where rotation is intermittent or moderate, where the drive pinion engages an external gear, and where the load includes a combination of axial thrust, radial load and overturning moment. Typical fits include industrial turntables and positioners, small swing drives, rotary packaging tables, welding manipulators, inspection platforms and light material-handling rotators. In many of these machines, the 690 mm outside diameter gives enough bolt circle and tooth capacity for a compact gearbox without making the frame oversized.
The double sealing is a meaningful advantage in dusty workshops, outdoor equipment and washdown-adjacent areas. It is not a substitute for a defined lubrication plan, but it helps retain grease and keep coarse contamination away from the roller path. The nylon cage is suitable for the kind of controlled industrial duty described here; it should not be treated as a licence to run at elevated temperatures or with aggressive chemicals. If the application has high shock, continuous high torque, or a very dirty environment, review the duty with FIJ before locking the design.
Specification Snapshot
| Specification | Value |
|---|---|
| Model | XOU25/560 |
| Series | Crossed roller XOU |
| Type | Crossed cylindrical roller slewing rings with external gear |
| Bore diameter (d) | 458 mm |
| Outside diameter (D) | 690 mm |
| Width (B) | 75 mm |
| Weight | 90 kg |
| Cage | Nylon |
| Number of rows | Single |
| Precision grade | P0, P6, P5 |
| Sealing | Double sealed |
Selection Checks Before Ordering
A size check is only the first step. The XOU25/560 must be matched to the actual load case, the pinion geometry and the mounting interface. Before releasing a purchase order, work through the following checks:
- Confirm the combined radial, axial and moment loads, including shock and start-stop torque, against the bearing rating for your required life.
- Check the external gear data: module, tooth count, pressure angle and pinion centre distance must match the drive design.
- Verify mounting flatness, bolt circle, bolt size and clamp length; a slewing ring can be distorted by an uneven mating surface.
- Decide the precision grade — P0, P6 or P5 — based on runout, positioning accuracy and cost rather than habit.
- Agree lubrication, relubrication interval and seal protection for the site conditions; double sealing does not remove the need for maintenance access.
- Confirm the part number and drawing revision against the bearing number reference before ordering.
For machines with high overturning moments, check the bolt preload and the stiffness of the structure above and below the ring. The bearing can be correct on paper and still run badly if the housing is flexible. Also confirm whether the customer needs a metric drawing package, inspection records or a specific precision grade; those details affect lead time and should not be left to the order acknowledgement.
Ordering Notes and Fit
The XOU25/560 is supplied as a metric, single-row crossed roller slewing ring with an external gear. Its 90 kg weight calls for proper lifting points during assembly. Keep the ring in its packaging until the mounting surface is ready, and do not remove the seal or cage protection unnecessarily. If you are comparing drawings, use the model number, dimensions and gear data as a set — a similar bore and outside diameter does not guarantee the same load capacity or tooth form.
FIJ can review your load case, pinion data and mounting drawing, and recommend the appropriate precision grade and sealing configuration. Browse the product catalog for related slewing ring options, or send the application details for a direct selection check.
Request a quote: Send your XOU25/560 requirements, load data and delivery target to FIJ for a tailored quotation.