The SX011880 crossed roller bearing is a large-bore, high-capacity precision bearing with a 400 mm bore, 500 mm outside diameter and 46 mm width. It is designed for large rotary tables, industrial scanners, optical positioning equipment and heavy precision test systems.
The bearing provides a dynamic axial load rating of 385 kN, a static axial rating of 1,699 kN, a dynamic radial rating of 244 kN and a static radial rating of 833 kN. Its approximate mass is 24 kg.
An integrated inner ring and circumferentially split outer ring enable one bearing position to support radial, axial and tilting-moment loads. LYDL can supply P5, P4, P2 or customized accuracy, together with application-specific clearance, preload and lubrication.
When replacing an INA/Schaeffler or another brand bearing, provide the complete designation, suffix and operating conditions. Dimensional similarity alone does not confirm equivalent preload, running torque, coating, accuracy or load performance.
SX011880 Crossed Roller Bearing Overview
The SX011880 crossed roller bearing is a large-aperture precision bearing with dimensions of 400 × 500 × 46 mm. Its approximate mass is 24 kg.
The bearing uses an integrated inner ring and a circumferentially split outer ring. Cylindrical rollers are arranged alternately at 90 degrees, allowing one bearing position to support radial loads, axial loads and overturning moments.
Its 400 mm through-bore provides substantial space for hollow shafts, torque-motor components, optical paths, scanner assemblies, cable groups and rotary service connections.
SX011880 provides a major capacity increase over SX011868. It is intended for large precision mechanisms where the 340 mm bore or load capacity of SX011868 is insufficient.
For an overview of the full dimensional range, visit the LYDL SX crossed roller bearing series. Use a clear product photograph showing the 400 mm through-bore, integrated inner ring and split outer-ring structure. The visible product marking should display LYDL SX011880.
The listed load ratings are catalogue reference values. They should not be treated as the maximum permissible payload of the complete rotary platform.
Final selection must consider radial and axial forces, load offset, overturning moment, acceleration, shock, speed, operating cycle, lubrication and required service life.
Load ratings from different manufacturers should not be mixed in one calculation. Bearings with identical external dimensions may use different internal geometries, roller quantities, materials and rating methods.
Why Choose the SX011880?
400 mm Central Passage
The large bore can accommodate a hollow shaft, large torque-motor rotor, optical path, scanning components, cable groups or rotary connections.
This simplifies the integration of electrical, hydraulic, pneumatic or optical components through the center of rotation.
High Static Axial Capacity
SX011880 provides a static axial rating of 1,699 kN. This offers substantial capacity for heavy fixtures, stationary loads and slowly indexing platforms.
The bearing rating must still be assessed together with the actual moment load, contact safety and mounting-structure deformation.
Increased Radial Capacity
The dynamic radial rating is 244 kN, while the static radial rating is 833 kN. These values represent a significant capacity increase over smaller SX models.
Compact Combined-Load Arrangement
One crossed roller bearing position can support loads in multiple directions. This can reduce the axial length and mechanical complexity of a large rotary structure.
Configurable Precision
P5, P4, P2 and customized accuracy options are available. The correct grade should be selected using the allowable system runout, positioning error and rotational repeatability.
Main Applications
Large Direct-Drive Rotary Tables
SX011880 can support large torque-motor platforms requiring a 400 mm hollow passage. The bore provides space for the motor rotor, encoder, cables and rotary services.
Motor heat, rotor balance, starting torque and continuous operating temperature should be evaluated together with bearing preload.
Industrial CT and Nondestructive Testing Systems
The bearing can support large scanning platforms used for industrial computed tomography and nondestructive inspection.
The wide central opening provides space for scanning components and test objects. Low runout and controlled rotational velocity are important for image consistency.
Telescope and Electro-Optical Positioning
SX011880 can support telescope mounts, electro-optical platforms and large mirror-positioning mechanisms.
Wind load, drive backlash, cable resistance, vibration and center-of-gravity offset must be considered during selection.
Heavy Calibration and Assembly Fixtures
The bearing can support precision fixtures for large-component calibration, alignment, assembly and testing.
Fixture weight, payload eccentricity, reversing torque and emergency-stop loads should be included in the complete load spectrum. Combine four realistic application scenes with short English labels:
Direct-Drive Table
Industrial CT System
Optical Positioning
Calibration Fixture
Use consistent industrial lighting and natural colors. Equipment proportions should remain realistic and mechanically credible.
*The SX011868 C0r value shown follows the current LYDL SX series dataset and should be confirmed against the applicable quotation drawing.
The SX011868 crossed roller bearing should be considered when a 340 mm bore is sufficient and lower mass is preferred.
The SX011860 crossed roller bearing provides a more compact 380 mm outside diameter for equipment that only requires a 300 mm central opening.
SX011880 is appropriate when a 400 mm passage or its significantly higher axial and radial capacity is necessary.
Evaluating a Large Rotary System
Bearing capacity should not be evaluated from payload weight alone. Large equipment often applies considerable overturning moment because the load center is located away from the bearing center.
The engineering review should include:
Worktable and fixture mass
Maximum payload
Payload center-of-gravity offset
Motor or reducer forces
Acceleration and deceleration
Reversing torque
Emergency-stop loads
Cable-chain and hose resistance
Wind load for outdoor equipment
Housing and flange deformation
A high-capacity bearing cannot compensate for a flexible support structure. The flange and housing should be analyzed using the same maximum-load conditions.
Accuracy and Rotational Performance
LYDL can supply SX011880 in P5, P4, P2 or customized accuracy classes.
P5 is appropriate for many industrial positioning systems. P4 or P2 may be selected for scanning, calibration or optical equipment with more demanding runout limits.
Final system accuracy also depends on:
Shaft and housing geometry
Mounting-face flatness
Flange parallelism
Clamping deformation
Rotary-table rigidity
Drive-system eccentricity
Encoder installation
Payload deflection
Thermal expansion
A P2 bearing installed in an inaccurate or flexible structure will not automatically produce P2 system-level rotation.
Internal Clearance and Preload
Internal clearance generally produces lower friction torque and greater tolerance of mounting or thermal variation.
Controlled preload can improve angular rigidity, reversal accuracy and platform settling time. It may be preferred for direct-drive tables and scanning equipment.
Excessive preload can increase starting torque, operating temperature and sensitivity to flange deformation. The motor must provide sufficient torque under the selected preload and lubricant conditions.
For large direct-drive systems, specify permissible starting torque, running torque and torque variation.
Suffix and Designation Explanation
Suffixes may identify internal clearance, preload, coating, accuracy or design generation. Their meanings are manufacturer-specific.
Examples used in Schaeffler technical documentation include:
RL0: reduced internal clearance
VSP: defined preload
RR: Corrotect-coated configuration
A: may identify a particular design generation
An SX011880-A-VSP should not automatically be replaced by an unsuffixed SX011880.
The complete suffix, original drawing and operating conditions must be reviewed before replacement approval.
Replacement and Interchangeability
SX011880 and LRC 40046 may be used as dimensional interchange references. Functional interchangeability requires additional verification.
Confirm:
Complete original designation and suffix
Bore, outside diameter and width
Dimensional tolerances
Accuracy and runout limits
Internal clearance or preload
Starting and running torque
Axial and radial load ratings
Material and heat treatment
Lubricant
Coating or corrosion protection
Inspection and traceability documents
LYDL can review the original label, drawing, catalogue data or inspection report before confirming replacement feasibility.
Third-party trademarks are used only for technical identification and comparison. Their use does not imply authorization, affiliation or original-brand manufacture.
Mounting and Flange Design
The circumferentially split outer ring requires continuous and uniform retention. It should be clamped by a rigid housing cover or flange.
A reference adjacent construction may use 24 × M20 flange screws. This does not mean the bearing itself contains integrated mounting holes.
The final screw quantity, size, strength class and tightening torque must be calculated according to the actual structure and operating loads.
Both mounting surfaces should be flat, parallel, clean and free from burrs. Uneven clamping may distort the raceways and increase rotational torque.
Tighten the flange screws gradually in a diagonal sequence. Rotate the bearing during tightening and monitor changes in starting or running torque.
Retaining elements locate the split ring during handling and assembly. They should not be treated as the primary structural load path.
Handling the 24 kg Bearing
SX011880 weighs approximately 24 kg and requires suitable lifting equipment.
Support the bearing evenly at multiple points. Do not lift it by only one section of the split outer ring.
Keep the bearing in its protective packaging until the installation area is clean and ready. Prevent impact, contamination and accidental ring separation.
Do not strike the ring during installation. Apply installation force uniformly to the appropriate bearing ring.
Thermal Behavior
Large torque motors, scanners and drive components can transfer heat into the bearing and surrounding structure.
A temperature difference between the inner and outer rings may change the effective clearance or preload. Aluminum housings expand more than bearing steel.
The thermal review should consider:
Motor heat
Housing material
Shaft material
Continuous operating time
Cooling method
Ambient temperature
Inner-to-outer-ring temperature difference
Check running torque and accuracy after the equipment reaches its normal operating temperature.
Lubrication and External Sealing
The standard SX011880 is open and does not contain integral seals. External protection is required where dust, coolant, moisture or outdoor contamination may enter the raceways.
Select grease according to speed, load, oscillation angle, temperature and maintenance interval. Avoid excessive grease because it may increase torque and heat.
Optical, CT and calibration systems may require low-noise or low-particle lubricant. Outdoor applications may need enhanced corrosion and moisture protection.
LYDL Manufacturing and Quality Control
LYDL can manufacture SX011880 using GCr15 or GCr15SiMn bearing steel. Accuracy, clearance, preload, lubricant and marking can be configured according to customer requirements.
Manufacturing and inspection may include:
Raw-material verification
Precision turning
Heat treatment and cryogenic stabilization
Raceway grinding and superfinishing
Roller manufacturing and optical sorting
Precision dimensional measurement
Deep cleaning and demagnetization
Controlled preload assembly
Starting and running-torque testing
Radial and axial runout inspection
Final visual inspection
Laser marking
Rust prevention
Inspection items, measurement methods and acceptance limits should be agreed before production.
Inspection Documents and Export Packaging
Available documentation may include:
Material certificate
Hardness report
Dimensional inspection report
Radial and axial runout report
Starting or running-torque record
Clearance or preload record
Individual traceability information
Packaging photographs
Individual anti-rust protection, protective wrapping, shock-resistant material and reinforced export wooden cases can be provided.
Moisture protection, lifting labels and orientation markings should be specified for sea freight or long-term storage. Use real inspection and packaging photographs. The bearing marking, individual package label and wooden-case information should consistently display SX011880.
These sources provide general engineering and comparison information. Final SX011880 selection should be based on the confirmed LYDL specification, operating conditions and approved drawing.
Information Required for an Accurate Quotation
Please provide:
Required quantity
Complete bearing designation and suffix
Required accuracy class
Clearance or preload requirement
Radial and axial loads
Tilting moment or payload offset
Maximum and continuous speed
Operating cycle
Operating temperature
Housing and shaft materials
Lubrication and sealing requirements
Corrosion-protection requirements
Inspection-document requirements
Delivery destination and required date
Frequently Asked Questions
1. When should SX011880 be selected instead of SX011868?
SX011880 should be considered when the application requires a 400 mm through-bore or significantly higher axial and radial load capacity.
2. Can SX011880 support a large direct-drive torque motor?
It can be suitable, but motor heat, rotor balance, bearing preload, starting torque and continuous operating temperature must be evaluated together.
3. How does the 24 kg mass affect the rotary system?
Bearing mass contributes to total system inertia and handling requirements. The table, fixture and payload normally contribute additional inertia that must also be calculated.
4. Is SX011880 suitable for a vertical rotary axis?
Potentially, but continuous gravitational moment, drive braking, lubricant distribution and retaining-flange design require specific review.
5. Does the 24 × M20 reference mean the bearing has mounting holes?
No. It refers to a possible adjacent flange arrangement. The standard SX011880 does not contain integral mounting holes.
6. What causes image errors in an industrial CT rotary platform?
Potential causes include bearing runout, encoder error, table deformation, drive-speed variation, thermal expansion and inaccurate workpiece positioning.
7. How should SX011880 be transported and stored?
Use a reinforced case, moisture protection and clear lifting markings. Store the bearing horizontally in a clean, dry environment unless an approved alternative is specified.
8. What information is most important when replacing another brand?
Provide the complete designation, suffix, accuracy, preload or clearance, torque limits, lubricant, coating, operating loads and original inspection requirements.
Request an SX011880 Quotation
Send LYDL your complete SX011880 designation, quantity, required accuracy, preload or clearance and operating conditions.
You can contact LYDL for SX011880 pricing and technical support to request drawings, inspection documents, application review and export-delivery information.
Combine four realistic application scenes with short English labels:
Use real inspection and packaging photographs. The bearing marking, individual package label and wooden-case information should consistently display SX011880.